DHC Working Group Y. Cui Internet-Draft H. Wang Intended status: Standards Track L. Sun Expires: September 22, 2016 Tsinghua University T. Lemon Nominum I. Farrer S. Zoric Deutsche Telekom AG March 21, 2016 YANG Data Model for DHCPv6 Configuration draft-ietf-dhc-dhcpv6-yang-01 Abstract This document describes a YANG data model [RFC6020] for the configuration and management of DHCPv6 servers, relays and clients. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on September 22, 2016. Copyright Notice Copyright (c) 2016 IETF Trust and the persons identified as the document authors. All rights reserved. Cui, et al. Expires September 22, 2016 [Page 1] Internet-Draft DHCPv6 YANG Model March 2016 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2. DHCPv6 Tree Diagrams . . . . . . . . . . . . . . . . . . . . 3 2.1. DHCPv6 Server Tree Diagrams . . . . . . . . . . . . . . . 3 2.2. DHCPv6 Relay Tree Diagrams . . . . . . . . . . . . . . . 12 2.3. DHCPv6 Client Tree Diagrams . . . . . . . . . . . . . . . 15 2.4. Notifications Mechanism for DHCPv6 . . . . . . . . . . . 20 3. DHCPv6 YANG Model . . . . . . . . . . . . . . . . . . . . . . 22 4. Security Considerations (TBD) . . . . . . . . . . . . . . . . 86 5. IANA Considerations (TBD) . . . . . . . . . . . . . . . . . . 87 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 87 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 87 7.1. Normative References . . . . . . . . . . . . . . . . . . 87 7.2. Informative References . . . . . . . . . . . . . . . . . 87 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 89 1. Introduction DHCPv6 [RFC3315] is widely used for supplying configuration and other relevant parameters to clients in IPv6 networks. This document defines a DHCPv6 YANG data model, containing sub-modules for the configuration and management of DHCPv6 servers, relays and clients. A single YANG model covering all of these elements provides an operator with a common interface for the management of the entire DHCPv6 deployment in their network. Since the publication of the original DHCPv6 specification, there have been a large number of addional documents that update the protocol's operation, add new functions and define new options. The YANG model described in this document incorporates all relevent changes. A full list of the documents which have been considedered in the development of this model is included in Appendix A. IF - Commment - Does anyone have this list? Cui, et al. Expires September 22, 2016 [Page 2] Internet-Draft DHCPv6 YANG Model March 2016 It is worth noting that as DHCPv6 is itself a device configuration protocol, it is not the intention of this document to replace the configuration of DHCPv6 options and parameters using the DHCPv6 protocol with the configuration of DHCPv6 options using NETCONF/YANG. The DHCPv6 client model is intended for the configuration of the DHCPv6 client function and also for obtaining read-only state data from the client which has been learnt via the normal DHCPv6 message flow. This gives an operator a better method for managing DHCPv6 clients and simplifies troubleshooting. 1.1. Terminology The reader should be familiar with the terms defined in DHCPv6 [RFC3315] and other relevant documents. The DHCPv6 tree diagrams provide a concise representation of a YANG module to help the reader understand the module structure. The meaning of the symbols in these diagrams are as follows: o Brackets "[" and "]" enclose list keys. o Braces "{" and "}" enclose feature content. o Parentheses "(" and ")" enclose choice and case nodes, and case nodes are also marked with a colon (":"). o Symbols after data node names: "?" means an optional node, and "*" denotes a list and leaf-list. o Abbreviations before data node names: "rw" means configuration data (read-write), and "ro" means state data (read-only). 2. DHCPv6 Tree Diagrams 2.1. DHCPv6 Server Tree Diagrams +--rw dhcpv6 +--rw server +--rw serv-attributes | +--rw name string | +--rw duid duidtype | +--rw enable boolean | +--rw interfaces-config* string | +--rw ipv6-address? inet:ipv6-address | +--rw description? string | +--rw pd-function boolean | +--rw stateless-service boolean | +--rw rapid-commit boolean Cui, et al. Expires September 22, 2016 [Page 3] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw vendor-info | +--rw ent-num uint32 | +--rw data* string +--rw option-sets | +--rw option-set* [option-set-id] | +--rw option-set-id -> /dhcpv6/server/option-sets/option-set | +--rw new-or-standard-option* [option-code] | | +--rw option-code uint16 | | +--rw option-name string | | +--rw option-description string | | +--rw option-reference? string | | +--rw option-value string | +--rw user-class-value? string | +--rw enterprise-number? uint32 | +--rw store-client-link-layer? boolean | +--rw preference-option | | +--rw enable boolean | | +--rw preference-value uint8 | +--rw sip-server-option | | +--rw enable boolean | | +--rw sip-server* [sip-serv-id] | | +--rw sip-serv-id uint8 | | +--rw sip-serv-domain-name string | | +--rw sip-serv-addr inet:ipv6-address | +--rw dns-config-option | | +--rw enable boolean | | +--rw dns-server* [dns-serv-id] | | | +--rw dns-serv-id uint8 | | | +--rw dns-serv-addr inet:ipv6-address | | +--rw domain-search-list string | +--rw nis-config-option | | +--rw enable boolean | | +--rw nis-server* [nis-serv-id] | | +--rw nis-serv-id uint8 | | +--rw nis-serv-addr inet:ipv6-address | +--rw nis-plus-config-option | | +--rw enable boolean | | +--rw nis-plus-server* [nis-plus-serv-id] | | +--rw nis-plus-serv-id uint8 | | +--rw nis-plus-serv-addr inet:ipv6-address | +--rw info-refresh-time-option | | +--rw enable boolean | | +--rw info-refresh-time yang:timeticks | +--rw cli-fqdn-option | | +--rw enable boolean | | +--rw server-initiate-update boolean | | +--rw client-initiate-update boolean | | +--rw modify-name-from-cli boolean Cui, et al. Expires September 22, 2016 [Page 4] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw timezone-option | | +--rw enable boolean | | +--rw tz-posix string | | +--rw tz-database string | +--rw ntp-server-option | | +--rw enable boolean | | +--rw ntp-server* [ntp-serv-id] | | +--rw ntp-serv-id uint8 | | +--rw ntp-serv-addr inet:ipv6-address | | +--rw ntp-serv-mul-addr inet:ipv6-address | | +--rw ntp-serv-fqdn string | +--rw sntp-server-option | | +--rw enable boolean | | +--rw sntp-server* [sntp-serv-id] | | +--rw sntp-serv-id uint8 | | +--rw sntp-serv-addr inet:ipv6-address | +--rw network-boot-option | | +--rw enable boolean | | +--rw boot-file* [boot-file-id] | | +--rw boot-file-id uint8 | | +--rw suitable-arch-type* uint16 | | +--rw suitable-net-if* uint32 | | +--rw boot-file-url string | | +--rw boot-file-paras* [para-id] | | +--rw para-id uint8 | | +--rw parameter string | +--rw dslite-option | | +--rw enable boolean | | +--rw dslite-aftr-name string | +--rw kerberos-option | | +--rw enable boolean | | +--rw default-realm-name string | | +--rw kdc-info* [kdc-id] | | +--rw kdc-id uint8 | | +--rw priority uint16 | | +--rw weight uint16 | | +--rw transport-type uint8 | | +--rw port-number uint16 | | +--rw kdc-ipv6-addr inet:ipv6-address | | +--rw realm-name string | +--rw addr-selection-option | | +--rw enable boolean | | +--rw a-bit-set boolean | | +--rw p-bit-set boolean | | +--rw policy-table* [policy-id] | | +--rw policy-id uint8 | | +--rw label uint8 | | +--rw precedence uint8 Cui, et al. Expires September 22, 2016 [Page 5] Internet-Draft DHCPv6 YANG Model March 2016 | | +--rw prefix-len uint8 | | +--rw prefix inet:ipv6-prefix | +--rw sol-max-rt-option | | +--rw enable boolean | | +--rw sol-max-rt-value yang:timeticks | +--rw inf-max-rt-option | | +--rw enable boolean | | +--rw inf-max-rt-value yang:timeticks | +--rw pcp-server-option | | +--rw enable boolean | | +--rw pcp-server* [pcp-serv-id] | | +--rw pcp-serv-id uint8 | | +--rw pcp-serv-addr* inet:ipv6-address | +--rw s46-rule-option | | +--rw enable boolean | | +--rw s46-rule* [rule-id] | | +--rw rule-id uint8 | | +--rw rule-type enumeration | | +--rw ea-len uint8 | | +--rw prefix4-len uint8 | | +--rw ipv4-prefix inet:ipv4-prefix | | +--rw prefix6-len uint8 | | +--rw ipv6-prefix inet:ipv6-prefix | | +--rw port-parameter | | +--rw offset uint8 | | +--rw psid-len uint8 | | +--rw psid uint16 | +--rw s46-br-option | | +--rw enable boolean | | +--rw br* [br-id] | | +--rw br-id uint8 | | +--rw br-ipv6-addr inet:ipv6-address | +--rw s46-dmr-option | | +--rw enable boolean | | +--rw dmr* [dmr-id] | | +--rw dmr-id uint8 | | +--rw dmr-prefix6-len inet:ipv6-address | | +--rw dmr-ipv6-prefix inet:ipv6-prefix | +--rw operator-option-ipv6-address | | +--rw enable boolean | | +--rw operator-ipv6-addr* [operator-ipv6-addr-id] | | +--rw operator-ipv6-addr-id uint8 | | +--rw operator-ipv6-addr inet:ipv6-address | +--rw operator-option-single-flag | | +--rw enable boolean | | +--rw flag* [flag-id] | | +--rw flag-id uint8 | | +--rw flag-value boolean Cui, et al. Expires September 22, 2016 [Page 6] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw operator-option-ipv6-prefix | | +--rw enable boolean | | +--rw operator-ipv6-prefix* [operator-ipv6-prefix-id] | | +--rw operator-ipv6-prefix-id uint8 | | +--rw operator-ipv6-prefix6-len uint8 | | +--rw operator-ipv6-prefix inet:ipv6-prefix | +--rw operator-option-int32 | | +--rw enable boolean | | +--rw int32val* [int32val-id] | | +--rw int32val-id uint8 | | +--rw int32val uint32 | +--rw operator-option-int16 | | +--rw enable boolean | | +--rw int16val* [int16val-id] | | +--rw int16val-id uint8 | | +--rw int16val uint16 | +--rw operator-option-int8 | | +--rw enable boolean | | +--rw int8* [int8val-id] | | +--rw int8val-id uint8 | | +--rw int8val uint8 | +--rw operator-option-uri | | +--rw enable boolean | | +--rw uri* [uri-id] | | +--rw uri-id uint8 | | +--rw uri string | +--rw operator-option-textstring | | +--rw enable boolean | | +--rw textstring* [textstring-id] | | +--rw textstring-id uint8 | | +--rw textstring string | +--rw operator-option-var-data | | +--rw enable boolean | | +--rw var-data* [var-data-id] | | +--rw var-data-id uint8 | | +--rw var-data binary | +--rw operator-option-dns-wire | | +--rw enable boolean | | +--rw operator-option-dns-wire* [operator-option-dns-wire-id] | | +--rw operator-option-dns-wire-id uint8 | | +--rw operator-option-dns-wire string | +--rw s46-v4-v6-binding-option | +--rw enable boolean | +--rw ce* [ce-id] | +--rw ce-id uint8 | +--rw ipv4-addr inet:ipv4-address | +--rw bind-prefix6-len uint8 | +--rw bind-ipv6-prefix inet:ipv6-prefix Cui, et al. Expires September 22, 2016 [Page 7] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw port-parameter | +--rw offset uint8 | +--rw psid-len uint8 | +--rw psid uint16 +--rw network-ranges | +--rw option-set [option-set-id] | +--rw network-range* [network-range-id] | +--rw network-range-id uint8 | +--rw network-description string | +--rw network-prefix inet:ipv6-prefix | +--rw inherit-option-set boolean | +--rw option-set [option-set-id] | +--rw address-pools | | +--rw address-pool* [pool-id] | | | +--rw pool-id uint8 | | | +--rw pool-prefix inet:ipv6-prefix | | | +--rw start-address inet:ipv6-address | | | +--rw end-address inet:ipv6-address | | | +--rw renew-time yang:timeticks | | | +--rw rebind-time yang:timeticks | | | +--rw preferred-lifetime yang:timeticks | | | +--rw valid-lifetime yang:timeticks | | | +--ro total-ipv6-count uint64 | | | +--ro used-ipv6-count uint64 | | | +--rw utilization-ratio threshold | | | +--rw inherit-option-set boolean | | | +--rw option-set [option-set-id] | | | +--rw reserved-addresses | | | +--rw static-binding* [cli-id] | | | | +--rw cli-id uint32 | | | | +--rw duid duidtype | | | | +--rw reserv-addr* inet:ipv6-address | | | +--rw other-reserv-addr* inet:ipv6-address | | +--ro binding-info* [cli-id] | | +--ro cli-id uint32 | | +--ro duid duidtype | | +--ro cli-ia* [iaid] | | +--ro ia-type string | | +--ro iaid uint32 | | +--ro cli-addr* inet:ipv6-address | | +--ro pool-id? uint8 | +--rw prefix-pools | | +--rw prefix-pool* [pool-id] | | | +--rw pool-id uint8 | | | +--rw prefix inet:ipv6-prefix | | | +--rw prefix-length uint8 | | | +--rw renew-time yang:timeticks | | | +--rw rebind-time yang:timeticks Cui, et al. Expires September 22, 2016 [Page 8] Internet-Draft DHCPv6 YANG Model March 2016 | | | +--rw preferred-lifetime yang:timeticks | | | +--rw valid-lifetime yang:timeticks | | | +--rw utilization-ratio threshold | | | +--rw inherit-option-set boolean | | | +--rw option-set [option-set-id] | | | +--rw reserved-prefixes | | | +--rw static-binding* [cli-id] | | | | +--rw cli-id uint32 | | | | +--rw duid duidtype | | | | +--rw reserv-prefix-len uint8 | | | | +--rw reserv-prefix inet:ipv6-prefix | | | +--rw exclude-prefix-len uint8 | | | +--rw exclude-prefix inet:ipv6-prefix | | | +--rw other-reserv-prefix* [reserv-id] | | | +--rw reserv-id uint8 | | | +--rw prefix-len uint8 | | | +--rw prefix inet:ipv6-prefix | | +--ro binding-info* [cli-id] | | +--ro cli-id uint32 | | +--ro duid duidtype | | +--ro cli-iapd* [iaid] | | +--ro iaid uint32 | | +--ro cli-prefix* uint32 | | +--ro cli-prefix-len* uint8 | | +--ro pool-id? uint8 | +--rw hosts | +--rw host* [cli-id] | +--rw cli-id uint32 | +--rw duid duidtype | +--rw inherit-option-set boolean | +--rw option-set [option-set-id] | +--rw nis-domain-name? string | +--rw nis-plus-domain-name? string +--rw relay-opaque-paras | +--rw relays* [relay-name] | +--rw relay-name string | +--rw interface-info* [if-name] | | +--rw if-name string | | +--rw interface-id string | +--rw subscribers* [subscriber] | | +--rw subscriber uint8 | | +--rw subscriber-id string | +--rw remote-host* [ent-num] | +--rw ent-num uint32 | +--rw remote-id string +--rw rsoo-enabled-options | +--rw rsoo-enabled-option* [option-code] | +--rw option-code uint16 Cui, et al. Expires September 22, 2016 [Page 9] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw description string +--ro packet-stats +--ro solicit-count uint32 +--ro request-count uint32 +--ro renew-count uint32 +--ro rebind-count uint32 +--ro decline-count uint32 +--ro release-count uint32 +--ro info-req-count uint32 +--ro advertise-count uint32 +--ro confirm-count uint32 +--ro reply-count uint32 +--ro reconfigure-count uint32 +--ro relay-forward-count uint32 +--ro relay-reply-count uint32 Figure 1: DHCPv6 Data Model Structure Introduction of important nodes: o serv-attributes: This container contains basic attributes of a DHCPv6 server such as DUID, server name and so on. Some optional functions that can be provided by the server is also included. o duid: Each server and client has only one DUID (DHCP Unique Identifier). The DUID here identifies a unique DHCPv6 server for clients. DUID consists of a two-octet type field and an arbitrary length (no more than 128 bytes) content field. o pd-function: Whether the server can act as a delegating router to perform prefix delegation ([RFC3633]). o operator-option-ipv6-address, operator-option-single-flag, operator-option-ipv6-prefix, operator-option-int32, operator- option-int16, operator-option-int8, operator-option-uri, operator- option-textstring, operator-option-var-data, operator-option-dns- wire: are generic option formats described in ([RFC7227]). o stateless-service: A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315]). o rapid-commit: Setting the value to '1' represents the server support the Solicit-Reply message exchange. '0' means the server will simply ignore the Rapid Commit option in Solicit message. o interfaces-config: A leaf list to denote which one or more interfaces the server should listen on. The default value is to Cui, et al. Expires September 22, 2016 [Page 10] Internet-Draft DHCPv6 YANG Model March 2016 listen on all the interfaces. This node is also used to set a unicast address for the server to listen with a specific interface. For example, if people want the server to listen on a unicast address with a specific interface, he can use the format like "eth1/2001:db8::1". o option-sets: DHCPv6 employs various options to carry additional information and parameters in DHCP messages. This container defines all the possible options that need to be configured at the server side. The relevant RFCs that define those options include: [RFC3315], [RFC3319], [RFC3646], [RFC3898], [RFC4242], [RFC4704], [RFC4833], [RFC5908], [RFC5970], [RFC4075], [RFC6334], [RFC6784], [RFC7078], [RFC7083], [RFC7291], [RFC7598]. o option-set: A server may allow different option sets to be configured for different conditions (i.e. different networks, clients and etc). This "option-set" list enables various sets of options being defined and configured in a single server. Different sets are distinguished by the key called "option-set- id". All the possible options discussed above are defined in the list and each option is corresponding to a container. Since all the options in the list are optional, each container in this list has a boolean parameter called "enable" to indicate whether this option (container) will be included in the current option set or not. With the "new-or-standard-option" list, it is easy to extend the model when new options are defined. We could also use the "new-or-standard-option" list to define an IETF standard option. o network-ranges: This model supports a hierarchy to achieve dynamic configuration. That is to say we could configure the server at different levels through this model. The top level is a global level which is defined as the container "network-ranges". The following levels are defined as sub-containers under it. The "network-ranges" contains the parameters (e.g. option-sets) that would be allocated to all the clients served by this server. o network-range: Under the "network-ranges" container, a "network- range" list is defined to configure the server at a network level which is also considered as the second level. Different network are identified by the key "network-range-id". This is because a server may have different configuration parameters (e.g. option sets) for different networks. o address-pools: Under the "network-range" list, a container describes the DHCPv6 server's address pools for a specific network is defined. This container supports the server to be configured at a pool level. Cui, et al. Expires September 22, 2016 [Page 11] Internet-Draft DHCPv6 YANG Model March 2016 o address-pool: A DHCPv6 server can be configured with several address pools for a specific network. This list defines such address pools which are distinguish by the key called "pool-id". o binding-info: A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses. o prefix-pools: If a server supports prefix delegation function, this container under the "network-range" list will be valid to define the delegating router's prefix pools for a specific network. This container also supports the server to be configured at a pool level. o prefix-pool: Similar to server's address pools, a delegating router can also be configured with multiple prefix pools specified by a list called "prefix-pool". o binding-info: A list records a binding information for each DHCPv6 requesting router that has already been configured IPv6 prefixes. o hosts: A server may also desire to be configured at a host level under some circumstances. This container include a list called "host" to allow the server carrying different parameters (e.g. option sets) for different hosts. o relay-opaque-paras: This container contains some opaque values in Relay Agent options that need to be configured on the server side only for value match. Such Relay Agent options include Interface- Id option, Remote-Id option and Subscriber-Id option. o rsoo-enabled-options: [RFC6422] requires that the server SHOULD have an administrator-configurable list of RSOO-enabled options. This container include a list called "rsoo-enabled-option" to allow new RSOO-enabled options to be defined at the server side. o packet-stats: A container presents the packet statistics related to the DHCPv6 server. 2.2. DHCPv6 Relay Tree Diagrams +--rw dhcpv6 +-- ... | +--rw relay +--rw relay-attributes | +--rw name string | +--rw enable boolean | +--rw description? string Cui, et al. Expires September 22, 2016 [Page 12] Internet-Draft DHCPv6 YANG Model March 2016 | +--rw dest-addrs* inet:ipv6-address | +--rw subscribers* [subscriber] | | +--rw subscriber uint8 | | +--rw subscriber-id string | +--rw remote-host* [entNum] | | +--rw ent-num uint32 | | +--rw remote-id string | +--rw vendor-info | +--rw ent-num uint32 | +--rw data* string +--rw relay-supplied-options-option | +--rw rsoo-set* [rsoo-set-id] | +--rw rsoo-set-id uint8 | +--rw erp-local-domain-name-option | +--rw enable boolean | +--rw erp-for-client* [cli-id] | +--rw cli-id uint32 | +--rw duid duidtype | +--rw erp-name string +--rw relay-if* [if-name] | +--rw if-name string | +--rw enable boolean | +--rw ipv6-address? ietf:ipv6-address | +--rw interface-id? string | +--rw rsoo-set [rsoo-set-id] | +--rw pd-route* [pd-route-id] | | +--rw pd-route-id uint8 | | +--rw requesting-router-id uint32 | | +--rw delegating-router-id uint32 | | +--rw next-router inet:ipv6-address | | +--rw last-router inet:ipv6-address | +--rw next-entity* [dest-addr] | +--rw dest-addr inet:ipv6-address | +--rw available boolean | +--rw multicast boolean | +--rw server boolean | +--ro packet-stats | +--ro cli-packet-rvd-count uint32 | +--ro solicit-rvd-count uint32 | +--ro request-rvd-count uint32 | +--ro renew-rvd-count uint32 | +--ro rebind-rvd-count uint32 | +--ro decline-rvd-count uint32 | +--ro release-rvd-count uint32 | +--ro info-req-rvd-count uint32 | +--ro relay-for-rvd-count uint32 | +--ro relay-rep-rvd-count uint32 | +--ro packet-to-cli-count uint32 Cui, et al. Expires September 22, 2016 [Page 13] Internet-Draft DHCPv6 YANG Model March 2016 | +--ro adver-sent-count uint32 | +--ro confirm-sent-count uint32 | +--ro reply-sent-count uint32 | +--ro reconfig-sent-count uint32 | +--ro relay-for-sent-count uint32 | +--ro relay-rep-sent-count uint32 +--ro relay-stats +--ro cli-packet-rvd-count uint32 +--ro relay-for-rvd-count uint32 +--ro relay-rep-rvd-count uint32 +--ro packet-to-cli-count uint32 +--ro relay-for-sent-count uint32 +--ro relay-rep-sent-count uint32 +--ro discarded-packet-count uint32 Introduction of important nodes: o relay-attributes: A container describes some basic attributes of the relay agent including some relay agent specific options data that need to be configured previously. Such options include Remote-Id option and Subscriber-Id option. o dest-addrs: Each DHCPv6 relay agent may be configured with a list of destination addresses. This node defines such a list of IPv6 addresses that may include unicast addresses, multicast addresses or other addresses. o relay-supplied-options-option: DHCPv6 relay agent could provide some information that would be useful to DHCPv6 client. Since relay agent cannot provide options directly to the client, [RFC6422] defines RSOO-enabled options to propose options for the server to send to the client. This container models such RSOO- enabled options. o rsoo-set: This list under the "relay-supplied-options-option" container is similar to the "option-set" defined in server feature. It allows the relay to implement several sets of RSOO- enabled options for different interfaces. The list only include the EAP Re-authentication Protocol (ERP) Local Domain Name DHCPv6 Option defined in [RFC6440], since it is the only one RSOO-enabled options accepted by IANA so far. o relay-if: A relay agent may have several interfaces, we should provide a way to configure and manage parameters on the interface- level. A list that describes specific interfaces and their corresponding parameters is employed to fulfil the configfuration. Here we use a string called "if-name" as the key of list. Cui, et al. Expires September 22, 2016 [Page 14] Internet-Draft DHCPv6 YANG Model March 2016 o pd-route: A sub-container of "relay-if" which describes the route for delegated prefixes into the provider edge router. o next-entity: This node defines a list that is used to describe the next hop entity of this relay agent. Different entities are distinguished by their addresses. o packet-stats: A container shows packet state information of a specific data communication. o relay-stats: The "relay-stats" container records and presents the overall packet statistics of the relay agent. 2.3. DHCPv6 Client Tree Diagrams +--rw dhcpv6 +-- ... | +--rw client +--rw client-if* [if-name] +--rw if-name string +--rw cli-id uint32 +--rw duid duidtype +--rw enable boolean +--rw description? string +--rw pd-function boolean +--rw rapid-commit boolean +--rw mo-tab | +--rw m-tab boolean | +--rw o-tab boolean +--rw oro-options | +--rw oro-option* [option-code] | +--rw option-code uint16 | +--rw description string +--rw client-configured-options | +--rw new-or-standard-cli-option* [option-code] | | +--rw option-code uint16 | | +--rw option-name string | | +--rw option-description string | | +--rw option-reference? string | | +--rw option-value string | +--rw user-class-option | | +--rw enable boolean | | +--rw user-class* [user-class-id] | | +--rw user-class-id uint8 | | +--rw user-class-info string | +--rw vendor-class-option | | +--rw enable boolean Cui, et al. Expires September 22, 2016 [Page 15] Internet-Draft DHCPv6 YANG Model March 2016 | | +--rw ent-num uint32 | | +--rw data* string | +--rw client-fqdn-option | | +--rw enable boolean | | +--rw fqdn string | | +--rw server-initiate-update boolean | | +--rw client-initiate-update boolean | +--rw client-architecture-type-option | | +--rw enable boolean | | +--rw architecture-types* [type-id] | | | +--rw type-id uint16 | | | +--rw most-preferred boolean | +--rw client-network-interface-option | | +--rw enable booelan | | +--rw type uint8 | | +--rw major uint8 | | +--rw minor uint8 | +--rw kerberos-principal-name-option | | +--rw enable boolean | | +--rw principal-name string | +--rw client-link-layer-addr-option | +--rw enable boolean | +--rw link-layer-type uint16 | +--rw link-layer-addr string +--ro identity-associations | +--ro identity-association* [iaid] | +--ro iaid uint32 | +--ro ia-type string | +--ro ipv6-addr* inet:ipv6-address | +--ro ipv6-prefix* inet:ipv6-prefix | +--ro prefix-length* uint8 | +--ro t1-time yang:timeticks | +--ro t2-time yang:timeticks | +--ro preferred-lifetime yang:timeticks | +--ro valid-lifetime yang:timeticks +--ro if-other-paras | +--ro uni-dhcpv6-serv-addr inet:ipv6-address | +--ro dns-paras | | +--ro domain-search-list string | | +--ro dns-servers* [dns-serv-id] | | +--ro dns-serv-id uint8 | | +--ro dns-serv-addr inet:ipv6-address | +--ro sip-paras | | +--ro sip-servers* [sip-serv-id] | | +--ro sip-serv-id uint8 | | +--ro sip-serv-addr inet:ipv6-address | | +--ro sip-serv-domain-name string | +--ro nis-paras Cui, et al. Expires September 22, 2016 [Page 16] Internet-Draft DHCPv6 YANG Model March 2016 | | +--ro nis-domain-name string | | +--ro nis-server* [nis-serv-id] | | +--ro nis-serv-id uint8 | | +--ro nis-serv-addr inet:ipv6-address | +--ro nis-plus-paras | | +--ro nis-plus-domain-name string | | +--ro nis-plus-server* [nis-plus-serv-id] | | +--ro nis-plus-serv-id uint8 | | +--ro nis-plus-serv-addr inet:ipv6-address | +--ro info-refresh-time yang:timeticks | +--ro time-zone-paras | | +--ro tz-posix string | | +--ro tz-database string | +--ro cli-fqdn string | +--ro ntp-paras | | +--ro ntp-server* [ntp-serv-id] | | +--ro ntp-serv-id uint8 | | +--ro ntp-serv-addr inet:ipv6-address | | +--ro ntp-serv-mul-addr inet:ipv6-address | | +--ro ntp-serv-fqdn string | +--ro sntp-paras | | +--ro sntp-server* [sntp-serv-id] | | +--ro sntp-serv-id uint8 | | +--ro sntp-serv-addr inet:ipv6-address | +--ro network-boot-paras | | +--ro boot-file* [boot-file-id] | | +--ro boot-file-id uint8 | | +--ro suitable-arch-type* uint16 | | +--ro suitable-net-if* uint32 | | +--ro boot-file-url string | | +--ro boot-file-paras* [para-id] | | +--ro para-id uint8 | | +--ro parameter string | +--ro kerberos-paras | | +--ro default-realm-name string | | +--ro kdc-info* [kdc-id] | | +--ro kdc-id uint8 | | +--ro priority uint16 | | +--ro weight uint16 | | +--ro transport-type uint8 | | +--ro port-number uint16 | | +--ro kdc-ipv6-addr inet:ipv6-address | | +--ro realm-name string | +--ro addr-selection-paras | | +--ro automatic-row-add boolean | | +--ro prefer-temporary-addr boolean | | +--ro policy-table* [policy-id] | | +--ro policy-id uint8 Cui, et al. Expires September 22, 2016 [Page 17] Internet-Draft DHCPv6 YANG Model March 2016 | | +--ro label uint8 | | +--ro precedence uint8 | | +--ro prefix-len uint8 | | +--ro prefix inet:ipv6-prefix | +--ro sol-max-rt yang:timeticks | +--ro inf-max-rt yang:timeticks | +--ro pcp-paras | | +--ro pcp-server* [pcp-serv-id] | | +--ro pcp-serv-id uint8 | | +--ro pcp-serv-addr inet:ipv6-address | +--ro s46-rule-paras | | +--ro s46-rule* [rule-id] | | +--ro rule-id uint8 | | +--ro rule-type enumeration | | +--ro ea-len uint8 | | +--ro prefix4-len uint8 | | +--ro ipv4-prefix inet:ipv4-prefix | | +--ro prefix6-len uint8 | | +--ro ipv6-prefix inet:ipv6-prefix | | +--ro port-parameter | | +--ro offset uint8 | | +--ro psid-len uint8 | | +--ro psid uint16 | +--ro s46-br-paras | | +--ro br* [br-id] | | +--ro br-id uint8 | | +--ro br-ipv6-addr inet:ipv6-address | +--ro s46-dmr-paras | | +--ro dmr* [dmr-id] | | +--ro dmr-id uint8 | | +--ro dmr-prefix6-len uint8 | | +--ro dmr-ipv6-prefix inet:ipv6-prefix | +--ro s46-v4-v6-binding-paras | | +--ro ipv4-addr inet:ipv6-address | | +--ro bind-prefix6-len uint8 | | +--ro port-parameter | | +--ro offset uint8 | | +--ro psid-len uint8 | | +--ro psid uint16 | +--ro erp-local-domain-name string +--ro supported-options | +--ro supported-option* [option-code] | +--ro option-code uint16 | +--ro description string +--ro packet-stats +--ro solicit-count uint32 +--ro request-count uint32 +--ro renew-count uint32 Cui, et al. Expires September 22, 2016 [Page 18] Internet-Draft DHCPv6 YANG Model March 2016 +--ro rebind-count uint32 +--ro decline-count uint32 +--ro release-count uint32 +--ro info-req-count uint32 +--ro advertise-count uint32 +--ro confirm-count uint32 +--ro reply-count uint32 +--ro reconfigure-count uint32 Introduction of important nodes: o client-if: A client may have several interfaces, it is more reasonable to configure and manage parameters on the interface- level. The list defines a specific client interface and its data. Different interfaces are distinguished by the "ifName" key which is a configurable string value. o duid: Each server and client has only one DUID (DHCP Unique Identifier). The DUID here will be carried in the Client ID option to identify a specific DHCPv6 client. This leaf are same as the "duid" leaf in "dhcpv6-server" feature. o pd-function: Whether the client can act as a requesting router to request prefixes using prefix delegation ([RFC3633]). o rapid-commit: '1' indicates a client can initiate a Solicit-Reply message exchange by adding a Rapid Commit option in Solicit message. '0' means the client is not allowed to add a Rapid Commit option to request addresses in a two-message exchange pattern. o mo-tab: The management tab label indicates the operation mode of the DHCPv6 client. 'm'=1 and 'o'=1 indicate the client will use DHCPv6 to obtain all the configuration data. 'm'=1 and 'o'=0 are a meaningless combination. 'm'=0 and 'o'=1 indicate the client will use stateless DHCPv6 to obtain configuration data apart from addresses/prefixes data. 'm'=0 and 'o'=0 represent the client will not use DHCPv6 but use SLAAC to achieve configuration. o oro-options: This container provide a way to configure the list of options that the client will request in its ORO option. o client-configured-options: Similar to the server, the client also need to configure some options to fulfil some desired functions. This container include all the potential options that need to be configured at the client side. The relevant RFCs that define those options include: [RFC3315], [RFC4704], [RFC5970], [RFC6784], [RFC6939]. Cui, et al. Expires September 22, 2016 [Page 19] Internet-Draft DHCPv6 YANG Model March 2016 o identity-association: IA is a construct through which a server and a client can identify, group, and manage a set of related IPv6 addresses. The key of the "identity-association" list is a 4-byte number IAID defined in [RFC3315]. o if-other-paras: A client can obtain extra configuration data other than address and prefix information through DHCPv6 options. This container describes such data the client was configured through DHCPv6. The potential configuration data may include DNS server parameters, SIP server parameters and etc. o supported-options: This state data container defines a list of options supported by the client for administrator to interrogate a client's capabilities. o packet-stats: A container records all the packet status information of a specific interface. 2.4. Notifications Mechanism for DHCPv6 Cui, et al. Expires September 22, 2016 [Page 20] Internet-Draft DHCPv6 YANG Model March 2016 +--rw dhcpv6 +-- ... | +--n notifications +--n dhcpv6-server-event | +--n pool-running-out | | +--ro utilization-ratio uint16 | | +--ro duid duidtype | | +--ro serv-name? string | | +--ro pool-name string | +--n invalid-client-detected | +--ro duid duidtype | +--ro description? string +--n dhcpv6-relay-event | +--n topo-changed | +--ro relay-if-name string | +--ro first-hop boolean | +--ro last-entity-addr inet:ipv6-address +--n dhcpv6-client-event +--n ia-lease-event | +--ro event-type enumeration | +--ro duid duidtype | +--ro iaid uint32 | +--ro serv-name? string | +--ro description? string +--n invalid-ia-detected | +--ro duid duidtype | +--ro iaid uint32 | +--ro serv-name? string | +--ro description? string +--n retransmission-failed | +--ro duid duidtype | +--ro description enumeration +--n failed-status-turn-up +--ro duid duidtype +--ro status-code enumeration Introduction of notifications: o pool-running-out: raised when the address/prefix pool is going to run out. A threshold for utilization ratio of the pool has been defined in the server feature so that it will notify the administrator when the utilization ratio reaches the threshold, and such threshold is a settable parameter. o invalid-client-detected: raised when the server has found a client which can be regarded as a potential attacker. Some description could also be included. Cui, et al. Expires September 22, 2016 [Page 21] Internet-Draft DHCPv6 YANG Model March 2016 o topo-changed: raised when the topology of the relay agent is changed. o ia-lease-event: raised when the client was allocated a new IA from the server or it renew/rebind/release its current IA. o invalid-ia-detected: raised when the identity association of the client can be proved to be invalid. Possible condition includes duplicated address, illegal address, etc. o retransmission-failed: raised when the retransmission mechanism defined in [RFC3315] is failed. o failed-status-turn-up: raised when the client receives a message includes an unsuccessful Status Code option. 3. DHCPv6 YANG Model This module imports typedefs from [RFC6991]. file "ietf-dhcpv6@2015-10-16.yang" module ietf-dhcpv6 { namespace "urn:ietf:params:xml:ns:yang:ietf-dhcpv6"; prefix "dhcpv6"; import ietf-inet-types { prefix inet; revision-date "2013-07-15"; } import ietf-yang-types { prefix yang; revision-date "2013-07-15"; } organization "dhc wg"; contact "yong@csnet1.cs.tsinghua.edu.cn wangh13@mails.tsinghua.edu.cn lh.sunlinh@gmail.com Ted.Lemon@nominum.com ian.farrer@telekom.de"; description "This model defines a YANG data model that can be used to configure and manage DHCPv6 server, DHCPv6 relay and DHCPv6 client."; revision 2015-10-16 { description "version05: Omit the feature statement. Modify model according to comments from Huawei. Also correct some Cui, et al. Expires September 22, 2016 [Page 22] Internet-Draft DHCPv6 YANG Model March 2016 grammar errors."; reference "I-D: draft-ietf-dhc-dhcpv6-yang-00"; } revision 2015-09-25 { description "version04: Correct duid and grammar errors."; reference "I-D: draft-cui-dhc-dhcpv6-yang-04"; } revision 2015-07-01 { description "version03: Correct grammar errors."; reference "I-D: draft-cui-dhc-dhcpv6-yang-03"; } revision 2015-04-13 { description "version02: Correct grammar errors."; reference "I-D: draft-cui-dhc-dhcpv6-yang-02"; } revision 2015-04-02 { description "version01: Correct grammar errors, Reuse groupings, Update 'dhcpv6-relay' feature, Add notifications."; reference "I-D: draft-cui-dhc-dhcpv6-yang-01"; } revision 2015-03-04 { description "version00: Initial revision."; reference "I-D: draft-cui-dhc-dhcpv6-yang-00"; } /* * Typedef */ typedef duidtype { type union { type uint16; type string { pattern '(([0-9a-fA-F]{2}){2,128})'; } } description "the type defined for duid"; } typedef threshold { Cui, et al. Expires September 22, 2016 [Page 23] Internet-Draft DHCPv6 YANG Model March 2016 type union { type uint16 { range 0..100; } type enumeration { enum "disabled" { description "No threshold"; } } } description "Threshold value in percent"; } /* * Grouping */ grouping vendor-infor { description "vendor info"; container vendor-info { description ""; leaf ent-num { type uint32; mandatory true; description "enterprise number"; } leaf-list data { type string; description "specific vendor info"; } } } grouping portset-para { description "portset parameters"; container port-parameter { description "port parameter"; leaf offset { type uint8; mandatory true; description "offset in a port set"; } leaf psid-len { type uint8; mandatory true; description "length of a psid"; } leaf psid { Cui, et al. Expires September 22, 2016 [Page 24] Internet-Draft DHCPv6 YANG Model March 2016 type uint16; mandatory true; description "psid value"; } } } /* * Data Nodes */ container server { description "dhcpv6 server portion"; container serv-attributes { description "This container contains basic attributes of a DHCPv6 server such as DUID, server name and so on. Some optional functions that can be provided by the server is also included."; leaf name { type string; mandatory true; description "server's name"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf enable { type boolean; mandatory true; description "whether to enable the server"; } leaf ipv6-address { type inet:ipv6-address; description "server's IPv6 address"; } leaf description { type string; description "description of the server"; } leaf pd-function { type boolean; mandatory true; description "Whether the server can act as a delegating router to perform prefix delegation ([RFC3633])."; } Cui, et al. Expires September 22, 2016 [Page 25] Internet-Draft DHCPv6 YANG Model March 2016 leaf stateless-service { type boolean; mandatory true; description "A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315])."; } leaf rapid-commit { type boolean; mandatory true; description "A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315])."; } leaf-list interfaces-config { type string; description "A leaf list to denote which one or more interfaces the server should listen on. The default value is to listen on all the interfaces. This node is also used to set a unicast address for the server to listen with a specific interface. For example, if people want the server to listen on a unicast address with a specific interface, he can use the format like 'eth1/2001:db8::1'."; } uses vendor-infor; } container option-sets { description "DHCPv6 employs various options to carry additional information and parameters in DHCP messages. This container defines all the possible options that need to be configured at the server side."; list option-set { key option-set-id; description "A server may allow different option sets to be configured for different conditions (i.e. different networks, clients and etc). This 'option-set' list enables various sets of options being defined and configured in a single server. Different sets are distinguished by the key called 'option-set-id'. All the possible options discussed above are defined in the list and each option is corresponding to a container."; leaf option-set-id { type leafref; { path "/dhcpv6/server/option-sets/option-set/option-set-id"; mandatory true; description "the option-set-id key"; Cui, et al. Expires September 22, 2016 [Page 26] Internet-Draft DHCPv6 YANG Model March 2016 } } list new-or-standard-option { key option-code; description "new or standard option"; leaf option-code { type uint16; mandatory true; description "the option code key"; } leaf option-name { type string; mandatory true; description "the new option's name"; } leaf option-description { type string; mandatory true; description "description of new option"; } leaf option-reference { type string; description "reference to the specification"; } leaf option-value { type string; mandatory true; description "the new option's value"; } } leaf user-class-value { type string; description "use class option's value"; } leaf enterprise-number { type uint32; description "enterprise number"; } leaf store-client-link-layer { type boolean; description "whether to store client's link layer address"; } container preference-option { description "preference option"; leaf enable { type boolean; Cui, et al. Expires September 22, 2016 [Page 27] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "indicate whether this option will be included in the option set"; } leaf preference-value { type uint8; mandatory true; description "the value for this option"; } } container sip-server-option { description "sip server option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list sip-server { key sip-serv-id; description "sip server info"; leaf sip-serv-id { type uint8; mandatory true; description "sip server id"; } leaf sip-serv-domain-name { type string; mandatory true; description "sip serevr domain name"; } leaf sip-serv-addr { type inet:ipv6-address; mandatory true; description "sip server addr"; } } } container dns-config-option { description "dns configuration option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the Cui, et al. Expires September 22, 2016 [Page 28] Internet-Draft DHCPv6 YANG Model March 2016 option set"; } list dns-server { key dns-serv-id; description "dns server info"; leaf dns-serv-id { type uint8; mandatory true; description "dns server id"; } leaf dns-serv-addr { type inet:ipv6-address; mandatory true; description "dns server addr"; } } leaf domain-search-list { type string; mandatory true; description "search list"; } } container nis-config-option { description "nis configurtaion option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list nis-server { key nis-serv-id; description "nis server info"; leaf nis-serv-id { type uint8; mandatory true; description "nis server id"; } leaf nis-serv-addr { type inet:ipv6-address; mandatory true; description "nis server addr"; } } } container nis-plus-config-option { description "nisp configuration option"; Cui, et al. Expires September 22, 2016 [Page 29] Internet-Draft DHCPv6 YANG Model March 2016 leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list nis-plus-server { key nis-plus-serv-id; description "nisp server info"; leaf nis-plus-serv-id { type uint8; mandatory true; description "nisp server id"; } leaf nis-plus-serv-addr { type inet:ipv6-address; mandatory true; description "nisp server addr"; } } } container info-refresh-time-option { description "info refresh time option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf info-refresh-time { type yang:timeticks; mandatory true; description "the refresh time"; } } container cli-fqdn-option { description "client fqdn option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf server-initiate-update { type boolean; Cui, et al. Expires September 22, 2016 [Page 30] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "server initiate"; } leaf client-initiate-update { type boolean; mandatory true; description "client initiate"; } leaf modify-name-from-cli { type boolean; mandatory true; description "modify by client"; } } container timezone-option { description "timezone option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf tz-posix { type string; mandatory true; description "tz posix"; } leaf tz-database { type string; mandatory true; description "tz database"; } } container ntp-server-option { description "ntp server option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list ntp-server { key ntp-serv-id; description "ntp server info"; leaf ntp-serv-id { type uint8; Cui, et al. Expires September 22, 2016 [Page 31] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "ntp server id"; } leaf ntp-serv-addr { type inet:ipv6-address; mandatory true; description "ntp server addr"; } leaf ntp-serv-mul-addr { type inet:ipv6-address; mandatory true; description "ntp server multicast addr"; } leaf ntp-serv-fqdn { type string; mandatory true; description "ntp server fqdn"; } } } container sntp-server-option { description "sntp server option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list sntp-server { key sntp-serv-id; description "sntp server info"; leaf sntp-serv-id { type uint8; mandatory true; description "sntp server id"; } leaf sntp-serv-addr { type inet:ipv6-address; mandatory true; description "sntp server addr"; } } } container network-boot-option { description "network boot option"; leaf enable { Cui, et al. Expires September 22, 2016 [Page 32] Internet-Draft DHCPv6 YANG Model March 2016 type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list boot-file { key boot-file-id; description "boot file info"; leaf boot-file-id { type uint8; mandatory true; description "boot file id"; } leaf-list suitable-arch-type { type uint16; description "architecture type"; } leaf-list suitable-net-if { type uint32; description "network interface"; } leaf boot-file-url { type string; mandatory true; description "url for boot file"; } list boot-file-paras { key para-id; description "boot file parameters"; leaf para-id { type uint8; mandatory true; description "parameter id"; } leaf parameter { type string; mandatory true; description "parameter value"; } } } } container dslite-option { description "dslite option"; leaf enable { type boolean; Cui, et al. Expires September 22, 2016 [Page 33] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "indicate whether this option will be included in the option set"; } leaf dslite-aftr-name { type string; mandatory true; description "aftr name"; } } container kerberos-option { description "kerberos option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf default-realm-name { type string; mandatory true; description "default realm name"; } list kdc-info { key kdc-id; description "kdc info"; leaf kdc-id { type uint8; mandatory true; description "kdc id"; } leaf priority { type uint16; mandatory true; description "priority"; } leaf weight { type uint16; mandatory true; description "weight"; } leaf transport-type { type uint8; mandatory true; description "transport type"; } Cui, et al. Expires September 22, 2016 [Page 34] Internet-Draft DHCPv6 YANG Model March 2016 leaf port-number { type uint16; mandatory true; description "port number"; } leaf kdc-ipv6-addr { type inet:ipv6-address; mandatory true; description "kdc ipv6 addr"; } leaf realm-name { type string; mandatory true; description "realm name"; } } } container addr-selection-option { description "address selection option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf a-bit-set { type boolean; mandatory true; description "a bit"; } leaf p-bit-set { type boolean; mandatory true; description "p bit"; } list policy-table { key policy-id; description "policy table"; leaf policy-id { type uint8; mandatory true; description "policy id"; } leaf label { type uint8; mandatory true; description "label"; Cui, et al. Expires September 22, 2016 [Page 35] Internet-Draft DHCPv6 YANG Model March 2016 } leaf precedence { type uint8; mandatory true; description "precedence"; } leaf prefix-len { type uint8; mandatory true; description "prefix length"; } leaf prefix { type inet:ipv6-prefix; mandatory true; description "prefix"; } } } container sol-max-rt-option { description "sol max rt option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf sol-max-rt-value { type yang:timeticks; mandatory true; description "sol max rt value"; } } container inf-max-rt-option { description "inf max rt option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } leaf inf-max-rt-value { type yang:timeticks; mandatory true; description "inf max rt value"; } } Cui, et al. Expires September 22, 2016 [Page 36] Internet-Draft DHCPv6 YANG Model March 2016 container pcp-server-option { description "pcp server option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list pcp-server { key pcp-serv-id; description "pcp server info"; leaf pcp-serv-id { type uint8; mandatory true; description "pcp server id"; } leaf pcp-serv-addr { type inet:ipv6-address; mandatory true; description "pcp server addr"; } } } container s46-rule-option { description "s46 rule option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list s46-rule { key rule-id; description "s46 rule"; leaf rule-id { type uint8; mandatory true; description "rule id"; } leaf rule-type { type enumeration { enum "BMR" { description "BMR"; } enum "FMR" { description "FMR"; Cui, et al. Expires September 22, 2016 [Page 37] Internet-Draft DHCPv6 YANG Model March 2016 } } mandatory true; description "rule type"; } leaf prefix4-len { type uint8; mandatory true; description "ipv4 prefix length"; } leaf ipv4-prefix { type inet:ipv4-prefix; mandatory true; description "ipv4 prefix"; } leaf prefix6-len { type uint8; mandatory true; description "ipv6 prefix length"; } leaf ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "ipv6 prefix"; } uses portset-para; } } container s46-br-option { description "s46 br option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list br { key br-id; description "br info"; leaf br-id { type uint8; mandatory true; description "br id"; } leaf br-ipv6-addr { type inet:ipv6-address; mandatory true; Cui, et al. Expires September 22, 2016 [Page 38] Internet-Draft DHCPv6 YANG Model March 2016 description "br ipv6 addr"; } } } container operator-option-ipv6-address { description "operator ipv6 address option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list operator-ipv6-addr { key operator-ipv6-addr-id; description "operator ipv6 address info"; leaf operator-ipv6-addr-id { type uint8; mandatory true; description "operator ipv6 address id"; } leaf operator-ipv6-addr { type inet:ipv6-address; mandatory true; description "operator ipv6 address id"; } } } container operator-option-single-flag { description "operator single flag"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list flag { key flag-id; description "operator single flag info"; leaf flag-id { type uint8; mandatory true; description "operator single flag id"; } leaf flag-value{ type boolean; mandatory true; Cui, et al. Expires September 22, 2016 [Page 39] Internet-Draft DHCPv6 YANG Model March 2016 description "operator single flag value"; } } } container operator-option-ipv6-prefix { description "operator ipv6 prefix option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list operator-ipv6-prefix{ key operator-ipv6-prefix-id; description "operator ipv6 prefix info"; leaf operator-ipv6-prefix-id { type uint8; mandatory true; description "operator ipv6 prefix id"; } leaf operator-ipv6-prefix6-len{ type uint8; mandatory true; description "operator ipv6 prefix length"; } leaf operator-ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "operator ipv6 prefix"; } } } container operator-option-int32 { description "operator integer 32 option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list int32val{ key int32val-id; description "operator integer 32 info"; leaf int32val-id { type uint8; mandatory true; Cui, et al. Expires September 22, 2016 [Page 40] Internet-Draft DHCPv6 YANG Model March 2016 description "operator integer 32 id"; } leaf int32val{ type uint32; mandatory true; description "operator integer 32 value"; } } } container operator-option-int16 { description "operator integer 16 option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list int16val{ key int16val-id; description "operator integer 16 info"; leaf int16val-id { type uint8; mandatory true; description "operator integer 16 id"; } leaf int16val{ type uint16; mandatory true; description "operator integer 16 value"; } } } container operator-option-int8 { description "operator integer 8 option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list int8val{ key int32val-id; description "operator integer 8 info"; leaf int8val-id { type uint8; mandatory true; Cui, et al. Expires September 22, 2016 [Page 41] Internet-Draft DHCPv6 YANG Model March 2016 description "operator integer 8 id"; } leaf int8val{ type uint8; mandatory true; description "operator integer 8 value"; } } } container operator-option-uri { description "operator uri option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list uri{ key uri-id; description "operator uri info"; leaf uri-id { type uint8; mandatory true; description "operator uri id"; } leaf uri{ type string; mandatory true; description "operator uri value"; } } } container operator-option-textstring { description "operator itext string option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list textstring{ key textstring-id; description "operator text string info"; leaf textstring-id { type uint8; mandatory true; Cui, et al. Expires September 22, 2016 [Page 42] Internet-Draft DHCPv6 YANG Model March 2016 description "operator text string id"; } leaf textstring{ type string; mandatory true; description "operator text string value"; } } } container operator-option-var-data { description "operator variable length data option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list int32val{ key var-data-id; description "operator ivariable length data info"; leaf var-data-id { type uint8; mandatory true; description "operator variable length id"; } leaf var-data{ type binary; mandatory true; description "operator variable length value"; } } } container operator-option-dns-wire { description "operator dns wire format domain name list option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list operator-option-dns-wire{ key operator-option-dns-wire-id; description "operator dns wire format info"; leaf operator-option-dns-wire-id { type uint8; mandatory true; Cui, et al. Expires September 22, 2016 [Page 43] Internet-Draft DHCPv6 YANG Model March 2016 description "operator dns wire format id"; } leaf operator-option-dns-wire{ type binary; mandatory true; description "operator dns wire format value"; } } } container s46-dmr-option { description "s46 dmr option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list dmr { key dmr-id; description "dmr info"; leaf dmr-id { type uint8; mandatory true; description "dmr id"; } leaf dmr-prefix-len { type uint8; mandatory true; description "dmr prefix length"; } leaf dmr-ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "dmr ipv6 prefix"; } } } container s46-v4-v6-binding-option { description "s46 binding option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be included in the option set"; } list ce { Cui, et al. Expires September 22, 2016 [Page 44] Internet-Draft DHCPv6 YANG Model March 2016 key ce-id; description "ce info"; leaf ce-id { type uint8; mandatory true; description "ce id"; } leaf ipv4-addr { type inet:ipv4-address; mandatory true; description "ce ipv4 addr"; } leaf bind-prefix6-len { type uint8; mandatory true; description "bind ipv6 prefix length"; } leaf bind-ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "bind ipv6 prefix"; } uses portset-para; } } } } container network-ranges { description "This model supports a hierarchy to achieve dynamic configuration. That is to say we could configure the server at different levels through this model. The top level is a global level which is defined as the container 'network-ranges'. The following levels are defined as sub-containers under it. The 'network-ranges' contains the parameters (e.g. option-sets) that would be allocated to all the clients served by this server."; leaf-list option-set { type uint8; description "a specific option set"; } list network-range { key network-range-id; description "Under the 'network-ranges' container, a 'network-range' list is defined to configure the server at a Cui, et al. Expires September 22, 2016 [Page 45] Internet-Draft DHCPv6 YANG Model March 2016 network level which is also considered as the second level. Different network are identified by the key 'network-range-id'. This is because a server may have different configuration parameters (e.g. option sets) for different networks."; leaf network-range-id { type uint8; mandatory true; description "equivalent to subnet id"; } leaf network-description { type string; mandatory true; description "description of the subnet"; } leaf network-prefix { type inet:ipv6-prefix; mandatory true; description "subnet prefix"; } leaf inherit-option-set { type boolean; mandatory true; description "indicate whether to inherit the configuration from higher level"; } leaf-list option-set { type uint8; description "configured option set"; } container address-pools { description "A container describes the DHCPv6 server's address pools."; list address-pool { key pool-id; description "A DHCPv6 server can be configured with several address pools. This list defines such address pools which are distinguish by the key called 'pool-name'."; leaf pool-id { type uint8; mandatory true; description "pool id"; } leaf pool-prefix { type inet:ipv6-prefix; Cui, et al. Expires September 22, 2016 [Page 46] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "pool prefix"; } leaf start-address { type inet:ipv6-address-no-zone; mandatory true; description "start address"; } leaf end-address { type inet:ipv6-address-no-zone; mandatory true; description "end address"; } leaf renew-time { type yang:timeticks; mandatory true; description "renew time"; } leaf rebind-time { type yang:timeticks; mandatory true; description "rebind time"; } leaf preferred-lifetime { type yang:timeticks; mandatory true; description "preferred lifetime for IA"; } leaf valid-lifetime { type yang:timeticks; mandatory true; description "valid liftime for IA"; } leaf total-ipv6-count { type uint64; config "false"; mandatory true; description "how many ipv6 addressses are in the pool"; } leaf used-ipv6-count { type uint64; config "false"; mandatory true; description "how many are allocated"; } Cui, et al. Expires September 22, 2016 [Page 47] Internet-Draft DHCPv6 YANG Model March 2016 leaf utilization-ratio { type threshold; mandatory true; description "the utilization ratio"; } leaf inherit-option-set { type boolean; mandatory true; description "indicate whether to inherit the configuration from higher level"; } leaf-list option-set { type uint8; description "configured option set"; } container reserved-addresses { description "reserved addresses"; list static-binding { key cli-id; description "static binding of reserved addresses"; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf-list reserv-addr { type inet:ipv6-address; description "reserved addr"; } } leaf-list other-reserv-addr { type inet:ipv6-address; description "other reserved addr"; } } } list binding-info { key cli-id; Cui, et al. Expires September 22, 2016 [Page 48] Internet-Draft DHCPv6 YANG Model March 2016 config "false"; description "A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses."; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } list cli-ia { key iaid; description "client IA"; leaf ia-type { type string; mandatory true; description "IA type"; } leaf iaid { type uint32; mandatory true; description "IAID"; } leaf-list cli-addr { type inet:ipv6-address; description "client addr"; } leaf pool-id { type uint8; mandatory true; description "pool id"; } } } } container prefix-pools { description "If a server supports prefix delegation function, this container will be used to define the delegating router's refix pools."; list prefix-pool { key pool-id; description "Similar to server's Cui, et al. Expires September 22, 2016 [Page 49] Internet-Draft DHCPv6 YANG Model March 2016 address pools, a delegating router can also be configured with multiple prefix pools specified by a list called 'prefix-pool'."; leaf pool-id { type uint8; mandatory true; description "pool id"; } leaf prefix { type inet:ipv6-prefix; mandatory true; description "ipv6 prefix"; } leaf prefix-length { type uint8; mandatory true; description "prefix length"; } leaf renew-time { type yang:timeticks; mandatory true; description "renew time"; } leaf rebind-time { type yang:timeticks; mandatory true; description "rebind time"; } leaf preferred-lifetime { type yang:timeticks; mandatory true; description "preferred lifetime for IA"; } leaf valid-lifetime { type yang:timeticks; mandatory true; description "valid lifetime for IA"; } leaf utilization-ratio { type threshold; mandatory true; description "utilization ratio"; } leaf inherit-option-set { type boolean; mandatory true; Cui, et al. Expires September 22, 2016 [Page 50] Internet-Draft DHCPv6 YANG Model March 2016 description "whether to inherit configuration from higher level"; } leaf-list option-set { type uint8; description "configured option set"; } container reserved-prefixes { description "reserved prefixes"; list static-binding { key cli-id; description "static binding"; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf reserv-prefix-len { type uint8; mandatory true; description "reserved prefix length"; } leaf reserv-prefix { type inet:ipv6-prefix; mandatory true; description "reserved prefix"; } } leaf exclude-prefix-len { type uint8; mandatory true; description "exclude prefix length"; } leaf exclude-prefix { type inet:ipv6-prefix; mandatory true; description "exclude prefix"; } Cui, et al. Expires September 22, 2016 [Page 51] Internet-Draft DHCPv6 YANG Model March 2016 list other-reserv-prefix { key reserv-id; description "other reserved prefix"; leaf reserv-id { type uint8; mandatory true; description "reserved prefix id"; } leaf prefix-len { type uint8; mandatory true; description "prefix length"; } leaf prefix { type inet:ipv6-prefix; mandatory true; description "reserved prefix"; } } } } list binding-info { key cli-id; config "false"; description "A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses."; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifier"; } list cli-iapd { key iaid; description "client IAPD"; leaf iaid { type uint32; mandatory true; Cui, et al. Expires September 22, 2016 [Page 52] Internet-Draft DHCPv6 YANG Model March 2016 description "IAID"; } leaf-list cli-prefix { type inet:ipv6-prefix; description "client ipv6 prefix"; } leaf-list cli-prefix-len { type uint8; description "client prefix length"; } leaf pool-id { type uint8; mandatory true; description "pool id"; } } } } container hosts { description "hosts level"; list host { key cli-id; description "specific host"; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf inherit-option-set { type boolean; mandatory true; description "whether to inherit configuration from higher level"; } leaf-list option-set { type uint8; description "configured option set"; } leaf nis-domain-name { Cui, et al. Expires September 22, 2016 [Page 53] Internet-Draft DHCPv6 YANG Model March 2016 type string; description "nis domain name"; } leaf nis-plus-domain-name { type string; description "nisp domain name"; } } } } } container relay-opaque-paras { description "This container contains some opaque values in Relay Agent options that need to be configured on the server side only for value match. Such Relay Agent options include Interface-Id option, Remote-Id option and Subscriber-Id option."; list relays { key relay-name; description "relay agents"; leaf relay-name { type string; mandatory true; description "relay agent name"; } list interface-info { key if-name; description "interface info"; leaf if-name { type string; mandatory true; description "interface name"; } leaf interface-id { type string; mandatory true; description "interface id"; } } list subscribers { key subscriber; description "subscribers"; leaf subscriber { type uint8; mandatory true; description "subscriber"; } Cui, et al. Expires September 22, 2016 [Page 54] Internet-Draft DHCPv6 YANG Model March 2016 leaf subscriber-id { type string; mandatory true; description "subscriber id"; } } list remote-host { key ent-num; description "remote host"; leaf ent-num { type uint32; mandatory true; description "enterprise number"; } leaf remote-id { type string; mandatory true; description "remote id"; } } } } container rsoo-enabled-options { description "rsoo enabled options"; list rsoo-enabled-option{ key option-code; description "rsoo enabled option"; leaf option-code { type uint16; mandatory true; description "option code"; } leaf description { type string; mandatory true; description "description of the option"; } } } container packet-stats { config "false"; description "A container presents the packet statistics related to the DHCPv6 server."; leaf solicit-count { type uint32; mandatory true; description "solicit counter"; Cui, et al. Expires September 22, 2016 [Page 55] Internet-Draft DHCPv6 YANG Model March 2016 } leaf request-count { type uint32; mandatory true; description "request counter"; } leaf renew-count { type uint32; mandatory true; description "renew counter"; } leaf rebind-count { type uint32; mandatory true; description "rebind counter"; } leaf decline-count { type uint32; mandatory true; description "decline count"; } leaf release-count { type uint32; mandatory true; description "release counter"; } leaf info-req-count { type uint32; mandatory true; description "information request counter"; } leaf advertise-count { type uint32; mandatory true; description "advertise counter"; } leaf confirm-count { type uint32; mandatory true; description "confirm counter"; } leaf reply-count { type uint32; mandatory true; description "reply counter"; } leaf reconfigure-count { Cui, et al. Expires September 22, 2016 [Page 56] Internet-Draft DHCPv6 YANG Model March 2016 type uint32; mandatory true; description "reconfigure counter"; } leaf relay-forward-count { type uint32; mandatory true; description "relay forward counter"; } leaf relay-reply-count { type uint32; mandatory true; description "relay reply counter"; } } } container relay { description "dhcpv6 relay portion"; container relay-attributes { description "A container describes some basic attributes of the relay agent including some relay agent specific options data that need to be configured previously. Such options include Remote-Id option and Subscriber-Id option."; leaf name { type string; mandatory true; description "relay agent name"; } leaf enable { type boolean; mandatory true; description "whether the relay is enabled"; } leaf description { type string; description "description of the relay agent"; } leaf-list dest-addrs { type inet:ipv6-address; description "Each DHCPv6 relay agent may be configured with a list of destination addresses. This node defines such a list of IPv6 addresses that may include unicast addresses, multicast addresses Cui, et al. Expires September 22, 2016 [Page 57] Internet-Draft DHCPv6 YANG Model March 2016 or other addresses."; } list subscribers { key subscriber; description "subscribers"; leaf subscriber { type uint8; mandatory true; description "subscriber"; } leaf subscriber-id { type string; mandatory true; description "subscriber id"; } } list remote-host { key ent-num; description "remote host"; leaf ent-num { type uint32; mandatory true; description "enterprise number"; } leaf remote-id { type string; mandatory true; description "remote id"; } } uses vendor-infor; } container relay-supplied-options-option { description "relay supplied options option"; list rsoo-set { key rsoo-set-id; description "rsoo set"; leaf rsoo-set-id { type uint8; mandatory true; description "rsoo set id"; } container erp-local-domain-name-option { description "erp local domain name option"; leaf enable { type boolean; mandatory true; description "indicate whether Cui, et al. Expires September 22, 2016 [Page 58] Internet-Draft DHCPv6 YANG Model March 2016 this option is included in the rsoo set"; } list erp-for-client { key cli-id; description "erp for client"; leaf cli-id { type uint32; mandatory true; description "client id"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf erp-name { type string; mandatory true; description "erp name"; } } } } } list relay-if { key if-name; description "A relay agent may have several interfaces, we should provide a way to configure and manage parameters on the interface-level. A list that describes specific interfaces and their corresponding parameters is employed to fulfil the configfuration. Here we use a string called 'if-name; as the key of list."; leaf if-name { type string; mandatory true; description "interface name"; } leaf enable { type boolean; mandatory true; description "whether this interface is enabled"; } leaf ipv6-address { type inet:ipv6-address; Cui, et al. Expires September 22, 2016 [Page 59] Internet-Draft DHCPv6 YANG Model March 2016 description "ipv6 address for this interface"; } leaf interface-id { type string; description "interface id"; } leaf-list rsoo-set { type uint8; description "configured rsoo set"; } list pd-route { key pd-route-id; description "pd route"; leaf pd-route-id { type uint8; mandatory true; description "pd route id"; } leaf requesting-router-id { type uint32; mandatory true; description "requesting router id"; } leaf delegating-router-id { type uint32; mandatory true; description "delegating router id"; } leaf next-router { type inet:ipv6-address; mandatory true; description "next router"; } leaf last-router { type inet:ipv6-address; mandatory true; description "previous router"; } } list next-entity { key dest-addr; description "This node defines a list that is used to describe the next hop entity of this relay distinguished by their addresses."; leaf dest-addr { Cui, et al. Expires September 22, 2016 [Page 60] Internet-Draft DHCPv6 YANG Model March 2016 type inet:ipv6-address; mandatory true; description "destination addr"; } leaf available { type boolean; mandatory true; description "whether the next entity is available or not"; } leaf multicast { type boolean; mandatory true; description "whether the address is multicast or not"; } leaf server { type boolean; mandatory true; description "whether the next entity is a server"; } container packet-stats { config "false"; description "packet statistics"; leaf cli-packet-rvd-count { type uint32; mandatory true; description "client received packet counter"; } leaf solicit-rvd-count { type uint32; mandatory true; description "solicit received counter"; } leaf request-rvd-count { type uint32; mandatory true; description "request received counter"; } leaf renew-rvd-count { type uint32; mandatory true; description "renew received counter"; Cui, et al. Expires September 22, 2016 [Page 61] Internet-Draft DHCPv6 YANG Model March 2016 } leaf rebind-rvd-count { type uint32; mandatory true; description "rebind recevied counter"; } leaf decline-rvd-count { type uint32; mandatory true; description "decline received counter"; } leaf release-rvd-count { type uint32; mandatory true; description "release received counter"; } leaf info-req-rvd-count { type uint32; mandatory true; description "information request counter"; } leaf relay-for-rvd-count { type uint32; mandatory true; description "relay forward received counter"; } leaf relay-rep-rvd-count { type uint32; mandatory true; description "relay reply received counter"; } leaf packet-to-cli-count { type uint32; mandatory true; description "packet to client counter"; } leaf adver-sent-count { type uint32; mandatory true; description "advertisement sent counter"; Cui, et al. Expires September 22, 2016 [Page 62] Internet-Draft DHCPv6 YANG Model March 2016 } leaf confirm-sent-count { type uint32; mandatory true; description "confirm sent counter"; } leaf reply-sent-count { type uint32; mandatory true; description "reply sent counter"; } leaf reconfig-sent-count { type uint32; mandatory true; description "reconfigure sent counter"; } leaf relay-for-sent-count { type uint32; mandatory true; description "relay forward sent counter"; } leaf relay-rep-sent-count { type uint32; mandatory true; description "relay reply sent counter"; } } } } container relay-stats { config "false"; description "relay statistics"; leaf cli-packet-rvd-count { type uint32; mandatory true; description "client packet received counter"; } leaf relay-for-rvd-count { type uint32; mandatory true; description "relay forward received counter"; } leaf relay-rep-rvd-count { Cui, et al. Expires September 22, 2016 [Page 63] Internet-Draft DHCPv6 YANG Model March 2016 type uint32; mandatory true; description "relay reply recevied counter"; } leaf packet-to-cli-count { type uint32; mandatory true; description "packet to client counter"; } leaf relay-for-sent-count { type uint32; mandatory true; description "relay forward sent counter"; } leaf relay-rep-sent-count { type uint32; mandatory true; description "relay reply sent counter"; } leaf discarded-packet-count { type uint32; mandatory true; description "discarded packet counter"; } } } container client { description "dhcpv6 client portion"; list client-if { key if-name; description "A client may have several interfaces, it is more reasonable to configure and manage parameters on the interface-level. The list defines specific client interfaces and their data. Different interfaces are distinguished by the key which is a configurable string value."; leaf if-name { type string; mandatory true; description "interface name"; } leaf cli-id { type uint32; mandatory true; description "client id"; } Cui, et al. Expires September 22, 2016 [Page 64] Internet-Draft DHCPv6 YANG Model March 2016 leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf enable { type boolean; mandatory true; description "whether the interface is enabled"; } leaf description { type string; description "description of the client interface"; } leaf pd-function { type boolean; mandatory true; description "Whether the client can act as a requesting router to request prefixes using prefix delegation ([RFC3633])."; } leaf rapid-commit { type boolean; mandatory true; description "'1' indicates a client can initiate a Solicit-Reply message exchange by adding a Rapid Commit option in Solicit message. '0' means the client is not allowed to add a Rapid Commit option to request addresses in a two-message exchange pattern."; } container mo-tab { description "The management tab label indicates the operation mode of the DHCPv6 client. 'm'=1 and 'o'=1 indicate the client will use DHCPv6 to obtain all the configuration data. 'm'=1 and 'o'=0 are a meaningless combination. 'm'=0 and 'o'=1 indicate the client will use stateless DHCPv6 to obtain configuration data apart from addresses/prefixes data. Cui, et al. Expires September 22, 2016 [Page 65] Internet-Draft DHCPv6 YANG Model March 2016 'm'=0 and 'o'=0 represent the client will not use DHCPv6 but use SLAAC to achieve configuration."; leaf m-tab { type boolean; mandatory true; description "m tab"; } leaf o-tab { type boolean; mandatory true; description "o tab"; } } container oro-options { description "oro options"; list oro-option { key option-code; description "oro option"; leaf option-code { type uint16; mandatory true; description "option code"; } leaf description { type string; mandatory true; description "description of oro options"; } } } container client-configured-options { description "client configured options"; list new-or-standard-cli-option { key option-code; description "new or standard client option"; leaf option-code { type uint16; mandatory true; description "option code"; } leaf option-name { type string; mandatory true; description "option name"; } Cui, et al. Expires September 22, 2016 [Page 66] Internet-Draft DHCPv6 YANG Model March 2016 leaf option-description { type string; mandatory true; description "description of client option"; } leaf option-reference { type string; description "the reference of option"; } leaf option-value { type string; mandatory true; description "the option value"; } } container user-class-option { description "user class option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; } list user-class { key user-class-id; description "user class"; leaf user-class-id { type uint8; mandatory true; description "user class id"; } leaf user-class-info { type string; mandatory true; description "user class info"; } } } container vendor-class-option { description "vendor class option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; Cui, et al. Expires September 22, 2016 [Page 67] Internet-Draft DHCPv6 YANG Model March 2016 } leaf ent-num { type uint32; mandatory true; description "enterprise number"; } leaf-list data { type string; description "option data"; } } container client-fqdn-option { description "client fqdn option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; } leaf fqdn { type string; mandatory true; description "fqdn"; } leaf server-initiate-update { type boolean; mandatory true; description "whether server initiate"; } leaf client-initiate-update { type boolean; mandatory true; description "whether client initiate"; } } container client-architecture-type-option { description "client architecture type option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; } list architecture-types { key type-id; Cui, et al. Expires September 22, 2016 [Page 68] Internet-Draft DHCPv6 YANG Model March 2016 description "architecture types"; leaf type-id { type uint16; mandatory true; description "type id"; } leaf most-preferred { type boolean; mandatory true; description "most preferred flag"; } } } container client-network-interface-option { description "client network interface option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; } leaf type { type uint8; mandatory true; description "type"; } leaf major { type uint8; mandatory true; description "major"; } leaf minor { type uint8; mandatory true; description "minor"; } } container kerberos-principal-name-option { description "kerberos principal name option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; Cui, et al. Expires September 22, 2016 [Page 69] Internet-Draft DHCPv6 YANG Model March 2016 } leaf principal-name { type string; mandatory true; description "principal name"; } } container client-link-layer-addr-option { description "client link layer address option"; leaf enable { type boolean; mandatory true; description "indicate whether this option will be configured at the client"; } leaf link-layer-type { type uint16; mandatory true; description "link layer type"; } leaf link-layer-addr { type string; mandatory true; description "link layer address"; } } } container identity-associations { config "false"; description "IA is a construct through which a server and a client can identify, group, and manage a set of related IPv6 addresses. The key of the list is a 4-byte number IAID defined in [RFC3315]."; list identity-association { key iaid; description "IA"; leaf iaid { type uint32; mandatory true; description "IAID"; } leaf ia-type { type string; mandatory true; description "IA type"; Cui, et al. Expires September 22, 2016 [Page 70] Internet-Draft DHCPv6 YANG Model March 2016 } leaf-list ipv6-addr { type inet:ipv6-address; description "ipv6 address"; } leaf-list ipv6-prefix { type inet:ipv6-prefix; description "ipv6 prefix"; } leaf-list prefix-length { type uint8; description "ipv6 prefix length"; } leaf t1-time { type yang:timeticks; mandatory true; description "t1 time"; } leaf t2-time { type yang:timeticks; mandatory true; description "t2 time"; } leaf preferred-lifetime { type yang:timeticks; mandatory true; description "preferred lifetime"; } leaf valid-lifetime { type yang:timeticks; mandatory true; description "valid lifetime"; } } } container if-other-paras { config "false"; description "A client can obtain extra configuration data other than address and prefix information through DHCPv6. This container describes such data the client was configured. The potential configuration data may include DNS server addresses, SIP server domain names, etc."; leaf-list uni-dhcpv6-serv-addr { type inet:ipv6-address; description "unicast server address"; Cui, et al. Expires September 22, 2016 [Page 71] Internet-Draft DHCPv6 YANG Model March 2016 } container dns-paras { description "dns parameters"; leaf domain-search-list { type string; mandatory true; description "domain search list"; } list dns-servers { key dns-serv-id; description "dns servers"; leaf dns-serv-id { type uint8; mandatory true; description "dns server id"; } leaf dns-serv-addr { type inet:ipv6-address; mandatory true; description "dns server address"; } } } container sip-paras { description "sip parameters"; list sip-servers { key sip-serv-id; description "sip server info"; leaf sip-serv-id { type uint8; mandatory true; description "sip server id"; } leaf sip-serv-addr { type inet:ipv6-address; mandatory true; description "sip server address"; } leaf sip-serv-domain-name { type string; mandatory true; description "sip server domain name"; } } } container nis-paras { description "nis parameters"; Cui, et al. Expires September 22, 2016 [Page 72] Internet-Draft DHCPv6 YANG Model March 2016 leaf nis-domain-name { type string; mandatory true; description "nis domain name"; } list nis-server { key nis-serv-id; description "nis server"; leaf nis-serv-id { type uint8; mandatory true; description "nis server id"; } leaf nis-serv-addr { type inet:ipv6-address; mandatory true; description "nis server address"; } } } container nis-plus-paras { description "nisp parameters"; leaf nis-plus-domain-name { type string; mandatory true; description "nisp domian name"; } list nis-plus-server { key nis-plus-serv-id; description "nisp server"; leaf nis-plus-serv-id { type uint8; mandatory true; description "nisp server id"; } leaf nis-plus-serv-addr { type inet:ipv6-address; mandatory true; description "nisp server address"; } } } leaf info-refresh-time { type yang:timeticks; description "info refresh time"; } container time-zone-paras { description "time zone parameters"; Cui, et al. Expires September 22, 2016 [Page 73] Internet-Draft DHCPv6 YANG Model March 2016 leaf tz-posix { type string; mandatory true; description "tz posix"; } leaf tz-database { type string; mandatory true; description "tz database"; } } leaf cli-fqdn { type string; description "client fqdn"; } container ntp-paras { description "ntp parameters"; list ntp-server { key ntp-serv-id; description "ntp server"; leaf ntp-serv-id { type uint8; mandatory true; description "ntp server id"; } leaf ntp-serv-addr { type inet:ipv6-address; mandatory true; description "ntp server address"; } leaf ntp-serv-mul-addr { type inet:ipv6-address; mandatory true; description "ntp server multicast address"; } leaf ntp-serv-fqdn { type string; mandatory true; description "ntp server fqdn"; } } } container sntp-paras { description "sntp parameters"; list sntp-server { key sntp-serv-id; description "sntp server"; Cui, et al. Expires September 22, 2016 [Page 74] Internet-Draft DHCPv6 YANG Model March 2016 leaf sntp-serv-id { type uint8; mandatory true; description "sntp server id"; } leaf sntp-serv-addr { type inet:ipv6-address; mandatory true; description "sntp server address"; } } } container network-boot-paras { description "network boot parameters"; list boot-file { key boot-file-id; description "boot file"; leaf boot-file-id { type uint8; mandatory true; description "boot file id"; } leaf-list suitable-arch-type { type uint16; description "architecture type"; } leaf-list suitable-net-if { type uint32; description "network interface"; } leaf boot-file-url { type string; mandatory true; description "boot file url"; } list boot-file-paras { key para-id; description "boot file parameters"; leaf para-id { type uint8; mandatory true; description "parameter id"; } leaf parameter { type string; mandatory true; description "parameter value"; } Cui, et al. Expires September 22, 2016 [Page 75] Internet-Draft DHCPv6 YANG Model March 2016 } } } container kerberos-paras { description "kerberos parameters"; leaf default-realm-name { type string; mandatory true; description "default realm name"; } list kdc-info { key kdc-id; description "kdc info"; leaf kdc-id { type uint8; mandatory true; description "kdc id"; } leaf priority { type uint16; mandatory true; description "priority"; } leaf weight { type uint16; mandatory true; description "weight"; } leaf transport-type { type uint8; mandatory true; description "transport type"; } leaf port-number { type uint16; mandatory true; description "port number"; } leaf kdc-ipv6-addr { type inet:ipv6-address; mandatory true; description "kdc ipv6 address"; } leaf realm-name { type string; mandatory true; description "realm name"; } Cui, et al. Expires September 22, 2016 [Page 76] Internet-Draft DHCPv6 YANG Model March 2016 } } container addr-selection-paras { description "address selection parameters"; leaf automatic-row-add { type boolean; mandatory true; description "row add"; } leaf prefer-temporary-addr { type boolean; mandatory true; description "prefer temporary"; } list policy-table { key policy-id; description "policy table"; leaf policy-id { type uint8; mandatory true; description "policy id "; } leaf label { type uint8; mandatory true; description "label"; } leaf precedence { type uint8; mandatory true; description "precedence"; } leaf prefix-len { type uint8; mandatory true; description "prefix length"; } leaf prefix { type inet:ipv6-prefix; mandatory true; description "prefix"; } } } leaf sol-max-rt { type yang:timeticks; mandatory true; description "sol max rt"; Cui, et al. Expires September 22, 2016 [Page 77] Internet-Draft DHCPv6 YANG Model March 2016 } leaf inf-max-rt { type yang:timeticks; mandatory true; description "inf max rt"; } container pcp-server-paras { description "pcp server parameters"; list pcp-server { key pcp-serv-id; description "pcp server"; leaf pcp-serv-id { type uint8; mandatory true; description "pcp server id"; } leaf pcp-serv-addr { type inet:ipv6-address; mandatory true; description "pcp server address"; } } } container s46-rule-paras { description "s46 rule parameters"; list s46-rule { key rule-id; description "s46 rule"; leaf rule-id { type uint8; mandatory true; description "rule id"; } leaf rule-type { type enumeration { enum "BMR"{ description "BMR"; } enum "FMR"{ description "FMR"; } } mandatory true; description "rule type"; } leaf ea-len { type uint8; mandatory true; Cui, et al. Expires September 22, 2016 [Page 78] Internet-Draft DHCPv6 YANG Model March 2016 description "EA bits length"; } leaf prefix4-len { type uint8; mandatory true; description "ipv4 prefix length"; } leaf ipv4-prefix { type inet:ipv4-prefix; mandatory true; description "ipv4 prefix"; } leaf prefix6-len { type uint8; mandatory true; description "ipv6 prefix length"; } leaf ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "ipv6 prefix"; } uses portset-para; } } container s46-br-paras { description "s46 br parameters"; list br { key br-id; description "br"; leaf br-id { type uint8; mandatory true; description "br id"; } leaf br-ipv6-addr { type inet:ipv6-address; mandatory true; description "br ipv6 address"; } } } container s46-dmr-paras { description "s46 dmr parameters"; list dmr { key dmr-id; description "dmr"; leaf dmr-id { Cui, et al. Expires September 22, 2016 [Page 79] Internet-Draft DHCPv6 YANG Model March 2016 type uint8; mandatory true; description "dmr id"; } leaf dmr-prefix-len { type uint8; mandatory true; description "dmr prefix length"; } leaf dmr-ipv6-prefix { type inet:ipv6-prefix; mandatory true; description "dmr prefix"; } } } container s46-v4-v6-binding-paras { description "s46 v4 v6 binding parameters"; leaf ipv4-addr { type inet:ipv4-address; mandatory true; description "ipv4 address"; } leaf bind-prefix6-len { type uint8; mandatory true; description "bind ipv6 prefix"; } uses portset-para; leaf erp-local-domain-name { type string; mandatory true; description "erp local domain name"; } } container supported-options { description "supported options"; list supported-option { key option-code; description "supported option"; leaf option-code { type uint16; mandatory true; description "option code"; } leaf description { type string; mandatory true; Cui, et al. Expires September 22, 2016 [Page 80] Internet-Draft DHCPv6 YANG Model March 2016 description "description of supported option"; } } } } container packet-stats { config "false"; description "A container records all the packet status information of a specific interface."; leaf solicit-count { type uint32; mandatory true; description "solicit counter"; } leaf request-count { type uint32; mandatory true; description "request counter"; } leaf renew-count { type uint32; mandatory true; description "renew counter"; } leaf rebind-count { type uint32; mandatory true; description "rebind counter"; } leaf decline-count { type uint32; mandatory true; description "decline counter"; } leaf release-count { type uint32; mandatory true; description "release counter"; } leaf info-req-count { type uint32; mandatory true; description "information request counter"; } leaf advertise-count { Cui, et al. Expires September 22, 2016 [Page 81] Internet-Draft DHCPv6 YANG Model March 2016 type uint32; mandatory true; description "advertise counter"; } leaf confirm-count { type uint32; mandatory true; description "confirm counter"; } leaf reply-count { type uint32; mandatory true; description "reply counter"; } leaf reconfigure-count { type uint32; mandatory true; description "recofigure counter"; } } } } /* * Notifications */ notification notifications { description "dhcpv6 notification module"; container dhcpv6-server-event { description "dhcpv6 server event"; container pool-running-out { description "raised when the address/prefix pool is going to run out. A threshold for utilization ratio of the pool has been defined in the server feature so that it will notify the administrator when the utilization ratio reaches the threshold, and such threshold is a settable parameter"; leaf utilization-ratio { type uint16; mandatory true; description "utilization ratio"; } leaf duid { type duidtype; Cui, et al. Expires September 22, 2016 [Page 82] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "DHCP Unique Identifer"; } leaf serv-name { type string; description "server name"; } leaf pool-name { type string; mandatory true; description "pool name"; } } container invalid-client-detected { description "raised when the server has found a client which can be regarded as a potential attacker. Some description could also be included."; leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf description { type string; description "description of the event"; } } } container dhcpv6-relay-event { description "dhcpv6 relay event"; container topo-changed { description "raised when the topology of the relay agent is changed."; leaf relay-if-name { type string; mandatory true; description "relay interface name"; } leaf first-hop { type boolean; mandatory true; description "first hop"; } leaf last-entity-addr { type inet:ipv6-address; Cui, et al. Expires September 22, 2016 [Page 83] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "last entity address"; } } } container dhcpv6-client-event { description "dhcpv6 client event"; container ia-lease-event { description "raised when the client was allocated a new IA from the server or it renew/rebind/release its current IA"; leaf event-type { type enumeration{ enum "allocation" { description "allocate"; } enum "rebind" { description "rebind"; } enum "renew" { description "renew"; } enum "release" { description "release"; } } mandatory true; description "event type"; } leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf iaid { type uint32; mandatory true; description "IAID"; } leaf serv-name { type string; description "server name"; } leaf description { type string; description "description of event"; Cui, et al. Expires September 22, 2016 [Page 84] Internet-Draft DHCPv6 YANG Model March 2016 } } container invalid-ia-detected { description "raised when the identity association of the client can be proved to be invalid. Possible condition includes duplicated address, illegal address, etc."; leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf cli-duid { type uint32; mandatory true; description "duid of client"; } leaf iaid { type uint32; mandatory true; description "IAID"; } leaf serv-name { type string; description "server name"; } leaf description { type string; description "description of the event"; } } container retransmission-failed { description "raised when the retransmission mechanism defined in [RFC3315] is failed."; leaf duid{ type duidtype; description "DUID"; } leaf description { type enumeration { enum "MRC failed" { description "MRC failed"; } enum "MRD failed" { description "MRD failed"; } } Cui, et al. Expires September 22, 2016 [Page 85] Internet-Draft DHCPv6 YANG Model March 2016 mandatory true; description "description of failure"; } } container failed-status-turn-up { description "raised when the client receives a message includes an unsuccessful Status Code option."; leaf duid { type duidtype; mandatory true; description "DHCP Unique Identifer"; } leaf status-code { type enumeration { enum "1" { description "UnspecFail"; } enum "2" { description "NoAddrAvail"; } enum "3" { description "NoBinding"; } enum "4" { description "NotOnLink"; } enum "5" { description "UseMulticast"; } } mandatory true; description "employed status code"; } } } } } 4. Security Considerations (TBD) TBD Cui, et al. Expires September 22, 2016 [Page 86] Internet-Draft DHCPv6 YANG Model March 2016 5. IANA Considerations (TBD) TBD 6. Acknowledgements The authors would like to thank Qi Sun, Lishan Li, Sladjana Zoric, Tomek Mrugalski, Marcin Siodelski, Bernie Volz and Bing Liu for their valuable comments and contributions to this work. 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3315] Droms, R., Ed., Bound, J., Volz, B., Lemon, T., Perkins, C., and M. Carney, "Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 3315, DOI 10.17487/RFC3315, July 2003, . [RFC3633] Troan, O. and R. Droms, "IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6", RFC 3633, DOI 10.17487/RFC3633, December 2003, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [RFC6087] Bierman, A., "Guidelines for Authors and Reviewers of YANG Data Model Documents", RFC 6087, DOI 10.17487/RFC6087, January 2011, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . 7.2. Informative References [RFC3319] Schulzrinne, H. and B. Volz, "Dynamic Host Configuration Protocol (DHCPv6) Options for Session Initiation Protocol (SIP) Servers", RFC 3319, DOI 10.17487/RFC3319, July 2003, . Cui, et al. Expires September 22, 2016 [Page 87] Internet-Draft DHCPv6 YANG Model March 2016 [RFC3646] Droms, R., Ed., "DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 3646, DOI 10.17487/RFC3646, December 2003, . [RFC3898] Kalusivalingam, V., "Network Information Service (NIS) Configuration Options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 3898, DOI 10.17487/RFC3898, October 2004, . [RFC4075] Kalusivalingam, V., "Simple Network Time Protocol (SNTP) Configuration Option for DHCPv6", RFC 4075, DOI 10.17487/RFC4075, May 2005, . [RFC4242] Venaas, S., Chown, T., and B. Volz, "Information Refresh Time Option for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 4242, DOI 10.17487/RFC4242, November 2005, . [RFC4704] Volz, B., "The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Client Fully Qualified Domain Name (FQDN) Option", RFC 4704, DOI 10.17487/RFC4704, October 2006, . [RFC4833] Lear, E. and P. Eggert, "Timezone Options for DHCP", RFC 4833, DOI 10.17487/RFC4833, April 2007, . [RFC5908] Gayraud, R. and B. Lourdelet, "Network Time Protocol (NTP) Server Option for DHCPv6", RFC 5908, DOI 10.17487/RFC5908, June 2010, . [RFC5970] Huth, T., Freimann, J., Zimmer, V., and D. Thaler, "DHCPv6 Options for Network Boot", RFC 5970, DOI 10.17487/RFC5970, September 2010, . [RFC6334] Hankins, D. and T. Mrugalski, "Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Option for Dual-Stack Lite", RFC 6334, DOI 10.17487/RFC6334, August 2011, . [RFC6422] Lemon, T. and Q. Wu, "Relay-Supplied DHCP Options", RFC 6422, DOI 10.17487/RFC6422, December 2011, . Cui, et al. Expires September 22, 2016 [Page 88] Internet-Draft DHCPv6 YANG Model March 2016 [RFC6440] Zorn, G., Wu, Q., and Y. Wang, "The EAP Re-authentication Protocol (ERP) Local Domain Name DHCPv6 Option", RFC 6440, DOI 10.17487/RFC6440, December 2011, . [RFC6784] Sakane, S. and M. Ishiyama, "Kerberos Options for DHCPv6", RFC 6784, DOI 10.17487/RFC6784, November 2012, . [RFC6939] Halwasia, G., Bhandari, S., and W. Dec, "Client Link-Layer Address Option in DHCPv6", RFC 6939, DOI 10.17487/RFC6939, May 2013, . [RFC7078] Matsumoto, A., Fujisaki, T., and T. Chown, "Distributing Address Selection Policy Using DHCPv6", RFC 7078, DOI 10.17487/RFC7078, January 2014, . [RFC7083] Droms, R., "Modification to Default Values of SOL_MAX_RT and INF_MAX_RT", RFC 7083, DOI 10.17487/RFC7083, November 2013, . [RFC7227] Hankins, D., Mrugalski, T., Siodelski, M., Jiang, S., and S. Krishnan, "Guidelines for Creating New DHCPv6 Options", BCP 187, RFC 7227, DOI 10.17487/RFC7227, May 2014, . [RFC7291] Boucadair, M., Penno, R., and D. Wing, "DHCP Options for the Port Control Protocol (PCP)", RFC 7291, DOI 10.17487/RFC7291, July 2014, . [RFC7598] Mrugalski, T., Troan, O., Farrer, I., Perreault, S., Dec, W., Bao, C., Yeh, L., and X. Deng, "DHCPv6 Options for Configuration of Softwire Address and Port-Mapped Clients", RFC 7598, DOI 10.17487/RFC7598, July 2015, . Authors' Addresses Yong Cui Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6260-3059 Email: yong@csnet1.cs.tsinghua.edu.cn Cui, et al. Expires September 22, 2016 [Page 89] Internet-Draft DHCPv6 YANG Model March 2016 Hao Wang Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6278-5822 Email: wangh13@mails.tsinghua.edu.cn Linhui Sun Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6278-5822 Email: lh.sunlinh@gmail.com Ted Lemon Nominum, Inc. 950 Charter St. Redwood City, CA 94043 USA Email: Ted.Lemon@nominum.com Ian Farrer Deutsche Telekom AG CTO-ATI, Landgrabenweg 151 Bonn, NRW 53227 Germany Email: ian.farrer@telekom.de Sladjana Zoric Deutsche Telekom AG CTO-IPT, Landgrabenweg 151 Bonn, NRW 53227 Germany Email: sladjana.zoric@telekom.de Cui, et al. Expires September 22, 2016 [Page 90]