PIM WG X. Liu Internet-Draft Volta Networks Intended status: Standards Track Z. Zhang, Ed. Expires: July 26, 2020 ZTE Corporation A. Peter Individual contributor M. Sivakumar Juniper networks F. Guo Huawei Technologies P. McAllister Metaswitch Networks January 23, 2020 A YANG Data Model for Multicast Source Discovery Protocol (MSDP) draft-ietf-pim-msdp-yang-12 Abstract This document defines a YANG data model for the configuration and management of Multicast Source Discovery Protocol (MSDP) Protocol. 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 https://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 July 26, 2020. Copyright Notice Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of Liu, et al. Expires July 26, 2020 [Page 1] Internet-Draft MSDP YANG Model January 2020 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 . . . . . . . . . . . . . . . . . . . . . . . 2 1.2. Conventions Used in This Document . . . . . . . . . . . . 3 1.3. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 3 1.4. Prefixes in Data Node Names . . . . . . . . . . . . . . . 3 2. Design of the Data Model . . . . . . . . . . . . . . . . . . 4 2.1. Scope of Model . . . . . . . . . . . . . . . . . . . . . 4 2.2. Specification . . . . . . . . . . . . . . . . . . . . . . 4 3. Module Structure . . . . . . . . . . . . . . . . . . . . . . 5 3.1. MSDP Configuration . . . . . . . . . . . . . . . . . . . 7 3.2. MSDP State . . . . . . . . . . . . . . . . . . . . . . . 7 3.3. MSDP RPC . . . . . . . . . . . . . . . . . . . . . . . . 8 4. MSDP YANG Model . . . . . . . . . . . . . . . . . . . . . . . 8 5. Security Considerations . . . . . . . . . . . . . . . . . . . 25 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 27 8. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 27 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 27 9.1. Normative References . . . . . . . . . . . . . . . . . . 27 9.2. Informative References . . . . . . . . . . . . . . . . . 29 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 29 1. Introduction [RFC3618] introduces the protocol definition of MSDP. This document defines a YANG data model that can be used to configure and manage the MSDP protocol. The operational state data and statistics can also be retrieved by this model. This model is designed to be used along with other multicast YANG models such as PIM [I-D.ietf-pim-yang], which are not covered in this document. 1.1. Terminology The terminology for describing YANG data models is found in [RFC6020] and [RFC7950], including: o augment Liu, et al. Expires July 26, 2020 [Page 2] Internet-Draft MSDP YANG Model January 2020 o data model o data node o identity o module The following abbreviations are used in this document and the defined model: MSDP: Multicast Source Discovery Protocol [RFC3618]. SA: Source-Active [RFC3618]. 1.2. Conventions Used in This Document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 1.3. Tree Diagrams Tree diagrams used in this document follow the notation defined in [RFC8340]. 1.4. Prefixes in Data Node Names In this document, names of data nodes, actions, and other data model objects are often used without a prefix, as long as it is clear from the context in which YANG module each name is defined. Otherwise, names are prefixed using the standard prefix associated with the corresponding YANG module, as shown in Table 1. Liu, et al. Expires July 26, 2020 [Page 3] Internet-Draft MSDP YANG Model January 2020 +-----------+--------------------------+-----------+ | Prefix | YANG module | Reference | +-----------+--------------------------+-----------+ | yang | ietf-yang-types | [RFC6991] | | | | | | inet | ietf-inet-types | [RFC6991] | | | | | | rt | ietf-routing | [RFC8349] | | | | | | if | ietf-interfaces | [RFC8343] | | | | | | ip | ietf-ip | [RFC8344] | | | | | | key-chain | ietf-key-chain | [RFC8177] | | | | | | rt-types | ietf-routing-types | [RFC8294] | | | | | | acl | ietf-access-control-list | [RFC8519] | +-----------+--------------------------+-----------+ Table 1 2. Design of the Data Model 2.1. Scope of Model The model covers MSDP [RFC3618]. This model can be used to configure and manage MSDP protocols. The operational state data and statistics can be retrieved by this model. Even though no protocol-specific notifications are defined in this model, the subscription and push mechanism defined in [RFC8639] and [RFC8641] can be implemented by the user to subscribe to notifications on the data nodes in this model. The model contains all the basic configuration parameters to operate the protocol. Depending on the implementation choices, some systems may not allow some of the advanced parameters to be configurable. The occasionally implemented parameters are modeled as optional features in this model. This model can be extended, and it has been structured in a way that such extensions can be conveniently made. 2.2. Specification The configuration data nodes cover global configuration attributes and per peer configuration attributes. The state data nodes include global, per peer, and source-active information. The container "msdp" is the top level container in this data model. The presence Liu, et al. Expires July 26, 2020 [Page 4] Internet-Draft MSDP YANG Model January 2020 of this container is expected to enable MSDP protocol functionality. No notification is defined in this model. 3. Module Structure This model imports and augments the ietf-routing YANG model defined in [RFC8349]. Both configuration data nodes and state data nodes of [RFC8349] are augmented. The YANG data model defined in this document conforms to the Network Management Datastore Architecture (NMDA) [RFC8342]. The operational state data is combined with the associated configuration data in the same hierarchy [RFC8407]. module: ietf-msdp augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol: +--rw msdp! +--rw global | +--rw tcp-connection-source? if:interface-ref {global-tcp-connect-source}? | +--rw default-peer* [peer-addr prefix-policy] {global-default-peer, global-default-peer-policy}? | | +--rw peer-addr -> ../../../peers/peer/address | | +--rw prefix-policy -> /acl:acls/acl/name | +--rw originating-rp | | +--rw interface? if:interface-ref | +--rw sa-filter {global-sa-filter}? | | +--rw in? -> /acl:acls/acl/name | | +--rw out? -> /acl:acls/acl/name | +--rw sa-limit? uint32 {global-sa-limit}? | +--rw ttl-threshold? uint8 {global-ttl-threshold}? +--rw peers | +--rw peer* [address] | +--rw address inet:ipv4-address | +--rw authentication | | +--rw (authentication-type)? | | +--:(key-chain) {peer-key-chain}? | | | +--rw key-chain? key-chain:key-chain-ref | | +--:(password) | | +--rw key? string | | +--rw crypto-algorithm? identityref | +--rw enable? boolean {peer-admin-enable}? | +--rw tcp-connection-source? if:interface-ref {peer-tcp-connect-source}? | +--rw description? string {peer-description}? | +--rw mesh-group? string Liu, et al. Expires July 26, 2020 [Page 5] Internet-Draft MSDP YANG Model January 2020 | +--rw peer-as? inet:as-number {peer-as}? | +--rw sa-filter | | +--rw in? -> /acl:acls/acl/name | | +--rw out? -> /acl:acls/acl/name | +--rw sa-limit? uint32 {peer-sa-limit}? | +--rw timer | | +--rw connect-retry-interval? uint16 | | +--rw holdtime-interval? uint16 | | +--rw keepalive-interval? uint16 | +--rw ttl-threshold? uint8 | +--ro session-state? enumeration | +--ro elapsed-time? uint32 | +--ro connect-retry-expire? uint32 | +--ro hold-expire? uint16 | +--ro is-default-peer? boolean | +--ro keepalive-expire? uint16 | +--ro reset-count? uint32 | +--ro statistics | +--ro discontinuity-time? yang:date-and-time | +--ro error | | +--ro rpf-failure? uint32 | +--ro queue | | +--ro size-in? uint32 | | +--ro size-out? uint32 | +--ro received | | +--ro keepalive? yang:counter64 | | +--ro notification? yang:counter64 | | +--ro sa-message? yang:counter64 | | +--ro sa-response? yang:counter64 | | +--ro sa-request? yang:counter64 | | +--ro total? yang:counter64 | +--ro sent | +--ro keepalive? yang:counter64 | +--ro notification? yang:counter64 | +--ro sa-message? yang:counter64 | +--ro sa-response? yang:counter64 | +--ro sa-request? yang:counter64 | +--ro total? yang:counter64 +--ro sa-cache +--ro entry* [group source-addr] +--ro group inet:ipv4-address +--ro source-addr union +--ro origin-rp* [rp-address] | +--ro rp-address inet:ip-address | +--ro is-local-rp? boolean | +--ro sa-adv-expire? uint32 +--ro state-attributes +--ro up-time? uint32 Liu, et al. Expires July 26, 2020 [Page 6] Internet-Draft MSDP YANG Model January 2020 +--ro expire? uint32 +--ro holddown-interval? uint32 +--ro peer-learned-from? inet:ipv4-address +--ro rpf-peer? inet:ipv4-address rpcs: +---x clear-peer | +---w input | +---w (peer) | +--:(peer-address) | | +---w peer-address? inet:ipv4-address | +--:(all) | +---w all-peers? empty +---x clear-sa-cache {rpc-clear-sa-cache}? +---w input +---w entry! | +---w group rt-types:ipv4-multicast-group-address | +---w source-addr? rt-types:ipv4-multicast-source-address +---w peer-address? inet:ipv4-address +---w peer-as? inet:as-number 3.1. MSDP Configuration MSDP configurations require peer configurations. Several peers may be configured in a mesh-group. The Source-Active information may be filtered by peers. The configuration modeling branch is composed of MSDP global and peer configurations. The two parts are the most important parts of MSDP. Besides the fundamental features of MSDP protocol, several optional features are included in the model. These features help the control of MSDP protocol. The peer features and SA features make the deployment and control easier. The connection parameters can be used to control the TCP connection because MSDP protocol is based on TCP. The authentication features make the protocol more secure. The filter features selectively allow operators to prevent SA information from being forwarded to peers. 3.2. MSDP State MSDP states are composed of MSDP global state, MSDP peer state, statistics information and SA cache information. The statistics information and SA cache information helps the operator to retrieve the protocol condition. Liu, et al. Expires July 26, 2020 [Page 7] Internet-Draft MSDP YANG Model January 2020 3.3. MSDP RPC The RPC part is used to define some useful and ordinary operations of protocol management. Network managers can delete all the information from a given peer by using the clear-peer rpc. And network managers can delete a given SA cache information by clear-sa-cache rpc. 4. MSDP YANG Model This module references [RFC3618], [RFC6991], [RFC8177], [RFC8343], [RFC8344], [RFC8349], [RFC8294], [RFC8519]. file "ietf-msdp@2020-01-24.yang" module ietf-msdp { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-msdp"; prefix msdp; import ietf-yang-types { prefix "yang"; reference "RFC 6991: Common YANG Data Types"; } import ietf-inet-types { prefix "inet"; reference "RFC 6991: Common YANG Data Types"; } import ietf-routing { prefix "rt"; reference "RFC 8349: A YANG Data Model for Routing Management (NMDA Version)"; } import ietf-interfaces { prefix "if"; reference "RFC 8343: A YANG Data Model for Interface Management"; } import ietf-ip { prefix "ip"; reference "RFC 8344: A YANG Data Model for IP Management"; } import ietf-key-chain { prefix "key-chain"; Liu, et al. Expires July 26, 2020 [Page 8] Internet-Draft MSDP YANG Model January 2020 reference "RFC 8177: YANG Data Model for Key Chains"; } import ietf-routing-types { prefix "rt-types"; reference "RFC 8294: Common YANG Data Types for the Routing Area"; } import ietf-access-control-list { prefix acl; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } organization "IETF PIM (Protocols for IP Multicast) Working Group"; contact "WG Web: WG List: Editor: Xufeng Liu Editor: Zheng Zhang Editor: Anish Peter Editor: Mahesh Sivakumar Editor: Feng Guo Editor: Pete McAllister "; description "The module defines the YANG model definitions for Multicast Source Discovery Protocol (MSDP). Copyright (c) 2020 IETF Trust and the persons identified as authors of the code. All rights reserved. Liu, et al. Expires July 26, 2020 [Page 9] Internet-Draft MSDP YANG Model January 2020 Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself for full legal notices. The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED', 'MAY', and 'OPTIONAL' in this document are to be interpreted as described in BCP 14 (RFC 2119) (RFC 8174) when, and only when, they appear in all capitals, as shown here."; revision 2020-01-24 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for MSDP."; } /* * Features */ feature feature-msdp { description "Support MSDP protocol for IPv4 multicast source discovery."; reference "RFC 3618: Multicast Source Discovery Protocol (MSDP)"; } feature global-tcp-connect-source { description "Support configuration of global tcp connect source."; } feature global-default-peer { description "Support configuration of global default peer."; } feature global-default-peer-policy { description "Support policy configuration of global default peer."; Liu, et al. Expires July 26, 2020 [Page 10] Internet-Draft MSDP YANG Model January 2020 reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } feature global-sa-filter { description "Support configuration of global SA filter."; } feature global-sa-limit { description "Support configuration of global limit on SA entries."; } feature global-ttl-threshold { description "Support configuration of global TTL threshold."; } feature rpc-clear-sa-cache { description "Support the RPC to clear SA cache."; } feature peer-admin-enable { description "Support configuration of peer administrative enabling."; } feature peer-as { description "Support configuration of peer AS number."; } feature peer-tcp-connect-source { description "Support configuration of peer tcp connect source."; } feature peer-description { description "Support configuration of peer description."; } feature peer-key-chain { description "Support configuration of peer key-chain."; Liu, et al. Expires July 26, 2020 [Page 11] Internet-Draft MSDP YANG Model January 2020 reference "RFC 8177: YANG Data Model for Key Chains."; } feature peer-sa-limit { description "Support configuration of per peer limit on SA entries."; } /* * Identities */ identity msdp { if-feature "feature-msdp"; base rt:control-plane-protocol; description "Identity for the Multicast Source Discovery Protocol (MSDP)."; } /* * Groupings */ grouping authentication-container { description "Authentication attributes."; container authentication { description "A container defining authentication attributes."; choice authentication-type { case key-chain { if-feature peer-key-chain; leaf key-chain { type key-chain:key-chain-ref; description "Reference to a key-chain."; reference "RFC 8177: YANG Data Model for Key Chains."; } } case password { leaf key { type string; description "This leaf describes the authentication key."; reference "RFC 8177: YANG Data Model for Key Chains."; } Liu, et al. Expires July 26, 2020 [Page 12] Internet-Draft MSDP YANG Model January 2020 leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Cryptographic algorithm associated with key."; reference "RFC 8177: YANG Data Model for Key Chains."; } } description "Choice of authentication."; } } } // authentication-container grouping tcp-connect-source { description "Attribute to configure peer TCP connection source."; leaf tcp-connection-source { type if:interface-ref; must "/if:interfaces/if:interface[if:name = current()]/" + "ip:ipv4" { error-message "The interface must have IPv4 enabled."; description "The interface must have IPv4 enabled."; } description "The interface is to be the source for the TCP connection. It is a reference to an entry in the global interface list."; } } // tcp-connection-source grouping global-config-attributes { description "Global MSDP configuration."; uses tcp-connect-source { if-feature global-tcp-connect-source; } list default-peer { if-feature global-default-peer; if-feature global-default-peer-policy; key "peer-addr prefix-policy"; description "The default peer accepts all MSDP SA messages. A default peer is needed in topologies where MSDP peers Liu, et al. Expires July 26, 2020 [Page 13] Internet-Draft MSDP YANG Model January 2020 do not coexist with BGP peers. The reverse path forwarding (RPF) check on SA messages can fail, and no SA messages are accepted. In these cases, you can configure the peer as a default peer and bypass RPF checks."; leaf peer-addr { type leafref { path "../../../peers/peer/address"; } mandatory true; description "Reference to a peer that is in the peer list."; } leaf prefix-policy { type leafref { path "/acl:acls/acl:acl/acl:name"; } description "If specified, only those SA entries whose RP is permitted in the prefix list are allowed; if not specified, all SA messages from the default peer are accepted."; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } } // default-peer container originating-rp { description "The container of Originating RP."; leaf interface { type if:interface-ref; must "/if:interfaces/if:interface[if:name = current()]/" + "ip:ipv4" { description "The interface must have IPv4 enabled."; } description "Reference to an entry in the global interface list. IP address of the interface used in the RP field of an SA message entry. When Anycast RPs are used, all RPs use the same IP address. This parameter can be used to define a unique IP address for the RP of each MSDP peer. By default, the software uses the RP address of the local system."; Liu, et al. Expires July 26, 2020 [Page 14] Internet-Draft MSDP YANG Model January 2020 } } // originating-rp uses sa-filter-container { if-feature global-sa-filter; } leaf sa-limit { if-feature global-sa-limit; type uint32; description "A limit on the number of SA entries accepted. By default, there is no limit."; } uses ttl-threshold { if-feature global-ttl-threshold; } } // global-config-attributes grouping peer-config-attributes { description "Per peer configuration for MSDP."; uses authentication-container; leaf enable { if-feature peer-admin-enable; type boolean; description "'true' if peer is enabled; 'false' if peer is disabled."; } uses tcp-connect-source { if-feature peer-tcp-connect-source; } leaf description { if-feature peer-description; type string; description "The peer description."; } leaf mesh-group { type string; description "Configure this peer to be a member of a mesh group"; } leaf peer-as { if-feature peer-as; type inet:as-number; description "Peer's autonomous system number (ASN). Using peer-as to Liu, et al. Expires July 26, 2020 [Page 15] Internet-Draft MSDP YANG Model January 2020 do verification can provide more controlled ability."; } uses sa-filter-container; leaf sa-limit { if-feature peer-sa-limit; type uint32; description "A limit on the number of SA entries accepted from this peer. By default, there is no limit."; } container timer { description "Timer attributes."; leaf connect-retry-interval { type uint16; units seconds; default 30; description "Peer timer for connect-retry. By default, MSDP peers wait 30 seconds after session is reset."; } leaf holdtime-interval { type uint16 { range "3..65535"; } units seconds; must "(../keepalive-interval and . > ../keepalive-interval) or "+"(not(../keepalive-interval) and . > 60)" { error-message "The keep alive interval must be " + "smaller than the hold time interval"; } default 75; description "The SA hold down period of this MSDP peer."; } leaf keepalive-interval { type uint16 { range "1..65535"; } units seconds; must "(../holdtime-interval and . < ../holdtime-interval) or "+"(not(../holdtime-interval) and . < 75)" { error-message "The keep alive interval must be " + "smaller than the hold time interval"; } default 60; description "The keepalive timer of this MSDP peer."; } } // timer uses ttl-threshold; Liu, et al. Expires July 26, 2020 [Page 16] Internet-Draft MSDP YANG Model January 2020 } // peer-config-attributes grouping peer-state-attributes { description "Per peer state attributes for MSDP."; leaf session-state { type enumeration { enum disabled { description "Disabled."; } enum inactive { description "Inactive."; } enum listen { description "Listen."; } enum connecting { description "Connecting."; } enum established { description "Established."; } } config false; description "Peer session state."; reference "RFC 3618: Multicast Source Discovery Protocol (MSDP)."; } leaf elapsed-time { type uint32; units seconds; config false; description "Elapsed time for being in a state."; } leaf connect-retry-expire { type uint32; units seconds; config false; description "Connect retry expire time of peer connection."; } leaf hold-expire { type uint16; units seconds; config false; description "Hold expire time of peer connection."; } leaf is-default-peer { Liu, et al. Expires July 26, 2020 [Page 17] Internet-Draft MSDP YANG Model January 2020 type boolean; config false; description "'true' if this peer is a default peer."; } leaf keepalive-expire { type uint16; units seconds; config false; description "Keepalive expire time of this peer."; } leaf reset-count { type uint32; config false; description "The reset count of this peer."; } container statistics { config false; description "A container defining statistics attributes."; leaf discontinuity-time { type yang:date-and-time; description "The time on the most recent occasion at which any one or more of the statistic counters suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this node contains the time the local management subsystem re-initialized itself."; } container error { description "A grouping defining error statistics attributes."; leaf rpf-failure { type uint32; description "Number of RPF failures."; } } // statistics-error container queue { description "A container includes queue statistics attributes."; leaf size-in { type uint32; description "The size of the input queue."; Liu, et al. Expires July 26, 2020 [Page 18] Internet-Draft MSDP YANG Model January 2020 } leaf size-out { type uint32; description "The size of the output queue."; } } // statistics-queue container received { description "Received message counters."; uses statistics-sent-received; } container sent { description "Sent message counters."; uses statistics-sent-received; } } // statistics-container } // peer-state-attributes grouping sa-filter-container { description "A container defining SA filters."; container sa-filter { description "Specifies an access control list (ACL) to filter source active (SA) messages coming in to or going out of the peer."; leaf in { type leafref { path "/acl:acls/acl:acl/acl:name"; } description "Filters incoming SA messages only. The value is the name to uniquely identify a policy that contains one or more rules used to accept or reject MSDP SA messages. If the policy is not specified, all MSDP SA messages are accepted."; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } leaf out { type leafref { path "/acl:acls/acl:acl/acl:name"; } description "Filters outgoing SA messages only. The value is the name to uniquely identify a Liu, et al. Expires July 26, 2020 [Page 19] Internet-Draft MSDP YANG Model January 2020 policy that contains one or more rules used to accept or reject MSDP SA messages. If the policy is not specified, all MSDP SA messages are sent."; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } } // sa-filter } // sa-filter-container grouping ttl-threshold { description "Attribute to configure TTL threshold."; leaf ttl-threshold { type uint8 { range 1..255; } description "Maximum number of hops data packets can traverse before being dropped."; } } // ttl-threshold grouping statistics-sent-received { description "A grouping defining sent and received statistics attributes."; leaf keepalive { type yang:counter64; description "The number of keepalive messages."; } leaf notification { type yang:counter64; description "The number of notification messages."; } leaf sa-message { type yang:counter64; description "The number of SA messages."; } leaf sa-response { type yang:counter64; description "The number of SA response messages."; } leaf sa-request { type yang:counter64; description Liu, et al. Expires July 26, 2020 [Page 20] Internet-Draft MSDP YANG Model January 2020 "The number of SA request messages."; } leaf total { type yang:counter64; description "The number of total messages."; } } // statistics-sent-received /* * Data nodes */ augment "/rt:routing/rt:control-plane-protocols/" + "rt:control-plane-protocol" { description "MSDP augmentation to routing instance. This augmentation is only valid for a routing protocol instance of MSDP."; container msdp { presence "Container for MSDP protocol."; description "MSDP configuration data."; container global { description "Global attributes."; uses global-config-attributes; } container peers { description "Containing a list of peers."; list peer { key "address"; description "List of MSDP peers."; leaf address { type inet:ipv4-address; description "The address of the peer"; } uses peer-config-attributes; uses peer-state-attributes; } // peer } // peers container sa-cache { config false; Liu, et al. Expires July 26, 2020 [Page 21] Internet-Draft MSDP YANG Model January 2020 description "The SA cache information."; list entry { key "group source-addr"; description "A list of SA cache entries."; leaf group { type inet:ipv4-address; description "The group address of this SA cache."; } leaf source-addr { type union { type enumeration { enum '*' { description "Any source address."; } } type inet:ipv4-address; } description "Source IPv4 address."; } list origin-rp { key "rp-address"; description "Origin RP address."; leaf rp-address { type inet:ip-address; description "The RP address."; } leaf is-local-rp { type boolean; description "The RP is local."; } leaf sa-adv-expire { type uint32; units seconds; description "The remaining time duration before expiration of the periodic SA advertisement timer on a local RP."; } } container state-attributes { description "SA cache state attributes for MSDP."; leaf up-time { type uint32; units seconds; description "The duration time of receiving this Liu, et al. Expires July 26, 2020 [Page 22] Internet-Draft MSDP YANG Model January 2020 SA cache."; } leaf expire { type uint32; units seconds; description "The duration time since this SA cache expires."; } leaf holddown-interval { type uint32; units seconds; description "Hold-down timer value for SA forwarding."; } leaf peer-learned-from { type inet:ipv4-address; description "The address of the peer that we learned this SA from."; } leaf rpf-peer { type inet:ipv4-address; description "The address is used to find the SA's originating RP."; } } // sa-cache-state-attributes } // entry } // sa-cache } // msdp } // augment /* * RPCs */ rpc clear-peer { description "Clears the TCP connection to the peer."; input { choice peer { mandatory true; description "Address of peer to be cleared."; case peer-address { leaf peer-address { type inet:ipv4-address; description "Address of peer to be cleared."; Liu, et al. Expires July 26, 2020 [Page 23] Internet-Draft MSDP YANG Model January 2020 } } case all { leaf all-peers { type empty; description "All peers' TCP connection are cleared."; } } } } } rpc clear-sa-cache { if-feature rpc-clear-sa-cache; description "Clears MSDP source active (SA) cache entries."; input { container entry { presence "If a particular entry is cleared."; description "The SA cache (S,G) or (*,G) entry to be cleared. If this is not provided, all entries are cleared."; leaf group { type rt-types:ipv4-multicast-group-address; mandatory true; description "The group address"; } leaf source-addr { type rt-types:ipv4-multicast-source-address; description "Address of multicast source to be cleared. If this is not provided then all entries related to the given group are cleared."; } } // s-g leaf peer-address { type inet:ipv4-address; description "Peer IP address from which MSDP SA cache entries have been learned. If this is not provided, entries learned from all peers are cleared."; } leaf peer-as { type inet:as-number; description "ASN from which MSDP SA cache entries have been learned. If this is not provided, entries learned from all AS's Liu, et al. Expires July 26, 2020 [Page 24] Internet-Draft MSDP YANG Model January 2020 are cleared."; } } } } 5. Security Considerations The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446]. The NETCONF access control model [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. These are the subtrees and data nodes and their sensitivity/vulnerability: Under /rt:routing/rt:control-plane-protocols/msdp, msdp:global This subtree specifies the configuration for the MSDP attributes at the global level. Modifying the configuration can cause MSDP default peers to be deleted or reconstructed, and the SA's unexpected filtering. msdp:peers This subtree specifies the configuration for the MSDP attributes at the peer level. The modification configuration will allow the unexpected MSDP peer establishment and unexpected SA information learning and advertisement. Liu, et al. Expires July 26, 2020 [Page 25] Internet-Draft MSDP YANG Model January 2020 The "key" field is also a sensitive readable configuration, the unauthorized reading function may lead to the password leaking. The modification will allow the unexpected peer reconstruction. Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. These are the subtrees and data nodes and their sensitivity/vulnerability: /rt:routing/rt:control-plane-protocols/msdp, Unauthorized access to any data node of the above subtree can disclose the operational state information of MSDP on this device. Some of the RPC operations in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. These are the operations and their sensitivity/vulnerability: /rt:routing/rt:control-plane-protocols/msdp:clear-peer, /rt:routing/rt:control-plane-protocols/msdp:clear-sa-cache, Unauthorized access to any of the above action operations can reconstruct the MSDP peers or delete SA records on this device. 6. IANA Considerations RFC Ed.: Please replace all occurrences of 'XXXX' with the actual RFC number (and remove this note). The IANA is requested to assign one new URIs from the IETF XML registry [RFC3688]. Authors are suggesting the following URI: URI: urn:ietf:params:xml:ns:yang:ietf-msdp Registrant Contact: The IESG XML: N/A, the requested URI is an XML namespace This document also requests one new YANG module name in the YANG Module Names registry [RFC6020] with the following suggestion: name: ietf-msdp namespace: urn:ietf:params:xml:ns:yang:ietf-msdp Liu, et al. Expires July 26, 2020 [Page 26] Internet-Draft MSDP YANG Model January 2020 prefix: msdp reference: RFC XXXX 7. Contributors The authors would like to thank Yisong Liu (liuyisong@huawei.com), Benchong Xu (xu.benchong@zte.com.cn), Tanmoy Kundu (tanmoy.kundu@alcatel-lucent.com) for their valuable contributions. 8. Acknowledgement The authors would like to thank Stig Venaas, Jake Holland for their valuable comments and suggestions. 9. References 9.1. 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, . [RFC3618] Fenner, B., Ed. and D. Meyer, Ed., "Multicast Source Discovery Protocol (MSDP)", RFC 3618, DOI 10.17487/RFC3618, October 2003, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . Liu, et al. Expires July 26, 2020 [Page 27] Internet-Draft MSDP YANG Model January 2020 [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8177] Lindem, A., Ed., Qu, Y., Yeung, D., Chen, I., and J. Zhang, "YANG Data Model for Key Chains", RFC 8177, DOI 10.17487/RFC8177, June 2017, . [RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger, "Common YANG Data Types for the Routing Area", RFC 8294, DOI 10.17487/RFC8294, December 2017, . [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018, . [RFC8343] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 8343, DOI 10.17487/RFC8343, March 2018, . [RFC8344] Bjorklund, M., "A YANG Data Model for IP Management", RFC 8344, DOI 10.17487/RFC8344, March 2018, . Liu, et al. Expires July 26, 2020 [Page 28] Internet-Draft MSDP YANG Model January 2020 [RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for Routing Management (NMDA Version)", RFC 8349, DOI 10.17487/RFC8349, March 2018, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8519] Jethanandani, M., Agarwal, S., Huang, L., and D. Blair, "YANG Data Model for Network Access Control Lists (ACLs)", RFC 8519, DOI 10.17487/RFC8519, March 2019, . 9.2. Informative References [I-D.ietf-pim-yang] Liu, X., McAllister, P., Peter, A., Sivakumar, M., Liu, Y., and f. hu, "A YANG Data Model for Protocol Independent Multicast (PIM)", draft-ietf-pim-yang-17 (work in progress), May 2018. [RFC8407] Bierman, A., "Guidelines for Authors and Reviewers of Documents Containing YANG Data Models", BCP 216, RFC 8407, DOI 10.17487/RFC8407, October 2018, . [RFC8639] Voit, E., Clemm, A., Gonzalez Prieto, A., Nilsen-Nygaard, E., and A. Tripathy, "Subscription to YANG Notifications", RFC 8639, DOI 10.17487/RFC8639, September 2019, . [RFC8641] Clemm, A. and E. Voit, "Subscription to YANG Notifications for Datastore Updates", RFC 8641, DOI 10.17487/RFC8641, September 2019, . Authors' Addresses Xufeng Liu Volta Networks Email: xufeng.liu.ietf@gmail.com Liu, et al. Expires July 26, 2020 [Page 29] Internet-Draft MSDP YANG Model January 2020 Zheng Zhang (editor) ZTE Corporation No. 50 Software Ave, Yuhuatai Distinct Nanjing China Email: zzhang_ietf@hotmail.com Anish Peter Individual contributor Email: anish.ietf@gmail.com Mahesh Sivakumar Juniper networks 1133 Innovation Way Sunnyvale, CALIFORNIA 94089 USA Email: sivakumar.mahesh@gmail.com Feng Guo Huawei Technologies Huawei Bld., No.156 Beiqing Rd. Beijing 100095 China Email: guofeng@huawei.com Pete McAllister Metaswitch Networks 100 Church Street Enfield EN2 6BQ UK Email: pete.mcallister@metaswitch.com Liu, et al. Expires July 26, 2020 [Page 30]