PIM WG Xufeng. Liu Internet-Draft Volta Networks Intended status: Standards Track Zheng. Zhang Expires: October 25, 2019 ZTE Corporation Anish. Peter Individual contributor Mahesh. Sivakumar Juniper networks Feng. Guo Huawei Technologies Pete. McAllister Metaswitch Networks April 23, 2019 A YANG Data Model for Multicast Source Discovery Protocol (MSDP) draft-ietf-pim-msdp-yang-06 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 October 25, 2019. Copyright Notice Copyright (c) 2019 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 October 25, 2019 [Page 1] Internet-Draft MSDP YANG Model April 2019 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 2. Design of the Data Model . . . . . . . . . . . . . . . . . . 2 3. MSDP configuration . . . . . . . . . . . . . . . . . . . . . 4 4. MSDP State . . . . . . . . . . . . . . . . . . . . . . . . . 5 5. MSDP RPC . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6. MSDP YANG model . . . . . . . . . . . . . . . . . . . . . . . 5 7. Security Considerations . . . . . . . . . . . . . . . . . . . 20 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21 9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 22 10. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 22 11. Normative References . . . . . . . . . . . . . . . . . . . . 22 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 24 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, which are not covered in this document. 2. Design of the Data Model This model imports and augments ietf-routing YANG model defined in [RFC8349]. Both configuration data nodes and state data nodes of [RFC8349] are augmented. 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 of this container is expected to enable MSDP protocol functionality. No notification is defined in this model. module: ietf-msdp augment /rt:routing/rt:control-plane-protocols: +--rw msdp! +--rw global Liu, et al. Expires October 25, 2019 [Page 2] Internet-Draft MSDP YANG Model April 2019 | +--rw tcp-connection-source? if:interface-ref | +--rw default-peer* [peer-addr prefix-policy] {global-default-peer,global-default-peer-policy}? | | +--rw peer-addr -> ../../../peers/peer/address | | +--rw prefix-policy string | +--rw originating-rp | | +--rw interface? if:interface-ref | +--rw sa-filter | | +--rw in? string | | +--rw out? string | +--rw sa-limit? uint32 {global-sa-limit}? | +--rw ttl-threshold? uint8 +--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 | +--rw description? string {peer-description}? | +--rw mesh-group? string | +--rw peer-as? inet:as-number {peer-as}? | +--rw sa-filter | | +--rw in? string | | +--rw out? string | +--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 Liu, et al. Expires October 25, 2019 [Page 3] Internet-Draft MSDP YANG Model April 2019 | | +--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 +--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-address? inet:ipv4-address +---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. 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. Liu, et al. Expires October 25, 2019 [Page 4] Internet-Draft MSDP YANG Model April 2019 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. 4. 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. 5. MSDP RPC The RPC part is used to define some useful and ordinary operations of protocol management. Network manager can delete all the information from a given peer by using the clear-peer rpc. And network manager can delete a given SA cache information by clear-sa-cache rpc. 6. MSDP YANG model file "ietf-msdp.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 "RFC6991"; } import ietf-inet-types { prefix "inet"; reference "RFC6991"; } import ietf-routing { prefix "rt"; Liu, et al. Expires October 25, 2019 [Page 5] Internet-Draft MSDP YANG Model April 2019 reference "RFC8022"; } import ietf-interfaces { prefix "if"; reference "RFC7223"; } import ietf-ip { prefix "ip"; reference "RFC7277"; } import ietf-key-chain { prefix "key-chain"; reference "RFC8177"; } import ietf-routing-types { prefix "rt-types"; reference "RFC8294"; } 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 "; Liu, et al. Expires October 25, 2019 [Page 6] Internet-Draft MSDP YANG Model April 2019 description "The module defines the YANG definitions for MSDP. Copyright (c) 2018 IETF Trust and the persons identified as authors of the code. All rights reserved. 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 (http://trustee.ietf.org/license-info). This version of this YANG module is part of RFC 3618; see the RFC itself for full legal notices."; revision 2018-10-20 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for MSDP. RFC 3618: Multicast Source Discovery Protocol (MSDP). RFC 4624: Multicast Source Discovery Protocol (MSDP) MIB"; } /* * Features */ 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."; } feature global-sa-filter { description "Support configuration of global SA filter."; } feature global-sa-limit { Liu, et al. Expires October 25, 2019 [Page 7] Internet-Draft MSDP YANG Model April 2019 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."; } feature peer-password { description "Support configuration of peer password."; } feature peer-sa-limit { description "Support configuration of per peer limit on SA entries."; } Liu, et al. Expires October 25, 2019 [Page 8] Internet-Draft MSDP YANG Model April 2019 /* * 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."; } } case password { leaf key { type string; description "This leaf describes the authentication key."; } leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Cryptographic algorithm associated with key."; } } 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" { description "The interface must have IPv4 enabled."; } Liu, et al. Expires October 25, 2019 [Page 9] Internet-Draft MSDP YANG Model April 2019 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 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 string; 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."; } } // default-peer container originating-rp { description "The container of Originating RP."; leaf interface { Liu, et al. Expires October 25, 2019 [Page 10] Internet-Draft MSDP YANG Model April 2019 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 is 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."; } } // 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; } Liu, et al. Expires October 25, 2019 [Page 11] Internet-Draft MSDP YANG Model April 2019 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 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, SHOULD be set to 30 seconds."; } 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."; } Liu, et al. Expires October 25, 2019 [Page 12] Internet-Draft MSDP YANG Model April 2019 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; } // 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 "RFC3618: Multicast Source Discovery Protocol (MSDP)."; } leaf elapsed-time { type uint32; units seconds; config false; Liu, et al. Expires October 25, 2019 [Page 13] Internet-Draft MSDP YANG Model April 2019 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 { type boolean; config false; description "If this peer is 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 { Liu, et al. Expires October 25, 2019 [Page 14] Internet-Draft MSDP YANG Model April 2019 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."; } 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 string; description "Filters incoming SA messages only. The string value is the name to uniquely identify a policy that contains one or more policy rules used to accept or reject MSDP SA messages. Liu, et al. Expires October 25, 2019 [Page 15] Internet-Draft MSDP YANG Model April 2019 If a policy is not specified, all MSDP SA messages are accepted, The definition of such a policy is outside the scope of this document."; } leaf out { type string; description "Filters outgoing SA messages only. The string value is the name to uniquely identify a policy that contains one or more policy rules used to accept or reject MSDP SA messages. If a policy is not specified, all MSDP SA messages are accepted, The definition of such a policy is outside the scope of this document."; } } // 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."; } } // sa-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 Liu, et al. Expires October 25, 2019 [Page 16] Internet-Draft MSDP YANG Model April 2019 "The number of SA response messages."; } leaf sa-request { type yang:counter64; description "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" { 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 peer"; } uses peer-config-attributes; uses peer-state-attributes; } // peer Liu, et al. Expires October 25, 2019 [Page 17] Internet-Draft MSDP YANG Model April 2019 } // peers container sa-cache { config false; 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 { Liu, et al. Expires October 25, 2019 [Page 18] Internet-Draft MSDP YANG Model April 2019 type uint32; units seconds; description "The duration time of receiving this 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 { leaf peer-address { type inet:ipv4-address; description "Address of peer to be cleared. If this is not provided then all peers are cleared."; } } } rpc clear-sa-cache { if-feature rpc-clear-sa-cache; Liu, et al. Expires October 25, 2019 [Page 19] Internet-Draft MSDP YANG Model April 2019 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 are cleared."; } } } } 7. 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 Liu, et al. Expires October 25, 2019 [Page 20] Internet-Draft MSDP YANG Model April 2019 is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC5246]. The NETCONF access control model [RFC6536] 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. For MSDP, the ability to modify MSDP configuration will allow the unexpected MSDP peer establishment and unexpected SA information learning and advertisement. The "password" field is also a sensitive readable configuration, the unauthorized reading function may lead to the password leaking. The security considerations of MSDP [RFC3618] are applicable. 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. The MSDP Yang module supports the "clear-peer" and "clear-sa-cache" RPCs. If access to either of these is compromised, they can result in unexpected MSDP peer breakdown and unexpected SA information deletion. 8. IANA Considerations The IANA is requested to assign two 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: PIM WG 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 prefix: msdp reference: RFC XXXX Liu, et al. Expires October 25, 2019 [Page 21] Internet-Draft MSDP YANG Model April 2019 9. 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. 10. Acknowledgement The authors would like to thank Stig Venaas, Jake Holland for their valuable comments and suggestions. 11. Normative References [I-D.ietf-netmod-rfc6087bis] Bierman, A., "Guidelines for Authors and Reviewers of YANG Data Model Documents", draft-ietf-netmod-rfc6087bis-20 (work in progress), March 2018. [I-D.ietf-rtgwg-policy-model] Qu, Y., Tantsura, J., Lindem, A., and X. Liu, "A YANG Data Model for Routing Policy Management", draft-ietf-rtgwg- policy-model-06 (work in progress), March 2019. [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, . [RFC4624] Fenner, B. and D. Thaler, "Multicast Source Discovery Protocol (MSDP) MIB", RFC 4624, DOI 10.17487/RFC4624, October 2006, . [RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security (TLS) Protocol Version 1.2", RFC 5246, DOI 10.17487/RFC5246, August 2008, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . Liu, et al. Expires October 25, 2019 [Page 22] Internet-Draft MSDP YANG Model April 2019 [RFC6087] Bierman, A., "Guidelines for Authors and Reviewers of YANG Data Model Documents", RFC 6087, DOI 10.17487/RFC6087, January 2011, . [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, . [RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration Protocol (NETCONF) Access Control Model", RFC 6536, DOI 10.17487/RFC6536, March 2012, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . [RFC7223] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 7223, DOI 10.17487/RFC7223, May 2014, . [RFC7277] Bjorklund, M., "A YANG Data Model for IP Management", RFC 7277, DOI 10.17487/RFC7277, June 2014, . [RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing Management", RFC 8022, DOI 10.17487/RFC8022, November 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 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, . [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, . Liu, et al. Expires October 25, 2019 [Page 23] Internet-Draft MSDP YANG Model April 2019 Authors' Addresses Xufeng Liu Volta Networks Email: xufeng.liu.ietf@gmail.com Zheng Zhang 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 October 25, 2019 [Page 24]