BIER WG Ran. Chen Internet-Draft Min. Gu Intended status: Standards Track ZTE Corporation Expires: August 15, 2018 February 11, 2018 YANG Data Model for BIER RPCs draft-chen-bier-rpcs-yang-00.txt Abstract This document defines a YANG data model for BIER RPCs. 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 August 15, 2018. Copyright Notice Copyright (c) 2018 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 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. Chen & Gu Expires August 15, 2018 [Page 1] Internet-Draft BIER RPCs YANG February 2018 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Design of the Data Model . . . . . . . . . . . . . . . . . . 2 3. Overview the bier rpcs model . . . . . . . . . . . . . . . . 8 4. BIER YANG Data Model . . . . . . . . . . . . . . . . . . . . 9 5. Security Considerations . . . . . . . . . . . . . . . . . . . 18 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18 8. Normative references . . . . . . . . . . . . . . . . . . . . 18 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 19 1. Introduction This document defines a YANG data model for BIER RPCs. 2. Design of the Data Model module: ietf-bier-rpcs augment /coam-methods:continuity-check/coam-methods:input/coam-methods:destination-tp: +---w bier-address | +---w (bier-address)? | | +--:(bfrs) | | | +---w bier-bsl? bier:bsl | | | +---w bier-subdomainid? bier:sub-domain-id | | | +---w bfir? bier:bfr-id | | | +---w bier-bfers* [bier-bfrid] | | | +---w bier-bfrid bier:bfr-id | | +--:(m-addr) | | +---w vpn-id? uint32 | | +---w source-address? inet:ip-address | | +---w source-wildcard? uint8 | | +---w group-address? inet:ip-address | | +---w group-wildcard? uint8 | +---w target-bfers* [bier-bfrid] | | +---w bier-bfrid bier:bfr-id | +---w reply-mode? reply-mode +---w bier-te-address +---w bier-te-subdomainid? bier:sub-domain-id +---w bier-te-bp-info* [bier-te-bsl] | +---w bier-te-bsl bier:bsl | +---w bitstring* [si] | | +---w si bier:si | | +---w bitpositions* [bitposition] | | +---w bitposition bier-te:bit-string | +---w fec-stack-type* [si] | +---w si bier:si | +---w fec-stack-info* [bitposition] Chen & Gu Expires August 15, 2018 [Page 2] Internet-Draft BIER RPCs YANG February 2018 | +---w bitposition bier-te:bit-string | +---w (fec-stack-type) | +--:(connected) | | +---w local-bfr? inet:ip-address | | +---w local-interface? if:interface-ref | +--:(routed) | | +---w routed-bfr? inet:ip-address | +--:(local-decap) | +---w bfer? inet:ip-address +---w reply-mode-te? reply-mode augment /coam-methods:continuity-check/coam-methods:output/coam-methods:src-test-point: +--ro bier-address | +--ro (bier-address)? | | +--:(bfrs) | | | +--ro bier-bsl? bier:bsl | | | +--ro bier-subdomainid? bier:sub-domain-id | | | +--ro bfir? bier:bfr-id | | | +--ro bier-bfers* [bier-bfrid] | | | +--ro bier-bfrid bier:bfr-id | | +--:(m-addr) | | +--ro vpn-id? uint32 | | +--ro source-address? inet:ip-address | | +--ro source-wildcard? uint8 | | +--ro group-address? inet:ip-address | | +--ro group-wildcard? uint8 | +--ro target-bfers* [bier-bfrid] | | +--ro bier-bfrid bier:bfr-id | +--ro reply-mode? reply-mode +--ro bier-te-address +--ro bier-te-subdomainid? bier:sub-domain-id +--ro bier-te-bp-info* [bier-te-bsl] | +--ro bier-te-bsl bier:bsl | +--ro bitstring* [si] | | +--ro si bier:si | | +--ro bitpositions* [bitposition] | | +--ro bitposition bier-te:bit-string | +--ro fec-stack-type* [si] | +--ro si bier:si | +--ro fec-stack-info* [bitposition] | +--ro bitposition bier-te:bit-string | +--ro (fec-stack-type) | +--:(connected) | | +--ro local-bfr? inet:ip-address | | +--ro local-interface? if:interface-ref | +--:(routed) | | +--ro routed-bfr? inet:ip-address | +--:(local-decap) | +--ro bfer? inet:ip-address Chen & Gu Expires August 15, 2018 [Page 3] Internet-Draft BIER RPCs YANG February 2018 +--ro reply-mode-te? reply-mode augment /coam-methods:continuity-check/coam-methods:output/coam-methods:dest-test-point: +--ro bier-address | +--ro (bier-address)? | | +--:(bfrs) | | | +--ro bier-bsl? bier:bsl | | | +--ro bier-subdomainid? bier:sub-domain-id | | | +--ro bfir? bier:bfr-id | | | +--ro bier-bfers* [bier-bfrid] | | | +--ro bier-bfrid bier:bfr-id | | +--:(m-addr) | | +--ro vpn-id? uint32 | | +--ro source-address? inet:ip-address | | +--ro source-wildcard? uint8 | | +--ro group-address? inet:ip-address | | +--ro group-wildcard? uint8 | +--ro target-bfers* [bier-bfrid] | | +--ro bier-bfrid bier:bfr-id | +--ro reply-mode? reply-mode +--ro bier-te-address +--ro bier-te-subdomainid? bier:sub-domain-id +--ro bier-te-bp-info* [bier-te-bsl] | +--ro bier-te-bsl bier:bsl | +--ro bitstring* [si] | | +--ro si bier:si | | +--ro bitpositions* [bitposition] | | +--ro bitposition bier-te:bit-string | +--ro fec-stack-type* [si] | +--ro si bier:si | +--ro fec-stack-info* [bitposition] | +--ro bitposition bier-te:bit-string | +--ro (fec-stack-type) | +--:(connected) | | +--ro local-bfr? inet:ip-address | | +--ro local-interface? if:interface-ref | +--:(routed) | | +--ro routed-bfr? inet:ip-address | +--:(local-decap) | +--ro bfer? inet:ip-address +--ro reply-mode-te? reply-mode augment /coam-methods:path-discovery/coam-methods:input/coam-methods:destination-tp: +---w bier-address | +---w (bier-address)? | | +--:(bfrs) | | | +---w bier-bsl? bier:bsl | | | +---w bier-subdomainid? bier:sub-domain-id | | | +---w bfir? bier:bfr-id | | | +---w bier-bfers* [bier-bfrid] Chen & Gu Expires August 15, 2018 [Page 4] Internet-Draft BIER RPCs YANG February 2018 | | | +---w bier-bfrid bier:bfr-id | | +--:(m-addr) | | +---w vpn-id? uint32 | | +---w source-address? inet:ip-address | | +---w source-wildcard? uint8 | | +---w group-address? inet:ip-address | | +---w group-wildcard? uint8 | +---w target-bfers* [bier-bfrid] | | +---w bier-bfrid bier:bfr-id | +---w reply-mode? reply-mode +---w bier-te-address +---w bier-te-subdomainid? bier:sub-domain-id +---w bier-te-bp-info* [bier-te-bsl] | +---w bier-te-bsl bier:bsl | +---w bitstring* [si] | | +---w si bier:si | | +---w bitpositions* [bitposition] | | +---w bitposition bier-te:bit-string | +---w fec-stack-type* [si] | +---w si bier:si | +---w fec-stack-info* [bitposition] | +---w bitposition bier-te:bit-string | +---w (fec-stack-type) | +--:(connected) | | +---w local-bfr? inet:ip-address | | +---w local-interface? if:interface-ref | +--:(routed) | | +---w routed-bfr? inet:ip-address | +--:(local-decap) | +---w bfer? inet:ip-address +---w reply-mode-te? reply-mode augment /coam-methods:path-discovery/coam-methods:output/coam-methods:src-test-point: +--ro bier-address | +--ro (bier-address)? | | +--:(bfrs) | | | +--ro bier-bsl? bier:bsl | | | +--ro bier-subdomainid? bier:sub-domain-id | | | +--ro bfir? bier:bfr-id | | | +--ro bier-bfers* [bier-bfrid] | | | +--ro bier-bfrid bier:bfr-id | | +--:(m-addr) | | +--ro vpn-id? uint32 | | +--ro source-address? inet:ip-address | | +--ro source-wildcard? uint8 | | +--ro group-address? inet:ip-address | | +--ro group-wildcard? uint8 | +--ro target-bfers* [bier-bfrid] | | +--ro bier-bfrid bier:bfr-id Chen & Gu Expires August 15, 2018 [Page 5] Internet-Draft BIER RPCs YANG February 2018 | +--ro reply-mode? reply-mode +--ro bier-te-address +--ro bier-te-subdomainid? bier:sub-domain-id +--ro bier-te-bp-info* [bier-te-bsl] | +--ro bier-te-bsl bier:bsl | +--ro bitstring* [si] | | +--ro si bier:si | | +--ro bitpositions* [bitposition] | | +--ro bitposition bier-te:bit-string | +--ro fec-stack-type* [si] | +--ro si bier:si | +--ro fec-stack-info* [bitposition] | +--ro bitposition bier-te:bit-string | +--ro (fec-stack-type) | +--:(connected) | | +--ro local-bfr? inet:ip-address | | +--ro local-interface? if:interface-ref | +--:(routed) | | +--ro routed-bfr? inet:ip-address | +--:(local-decap) | +--ro bfer? inet:ip-address +--ro reply-mode-te? reply-mode augment /coam-methods:path-discovery/coam-methods:output/coam-methods:dest-test-point: +--ro bier-address | +--ro (bier-address)? | | +--:(bfrs) | | | +--ro bier-bsl? bier:bsl | | | +--ro bier-subdomainid? bier:sub-domain-id | | | +--ro bfir? bier:bfr-id | | | +--ro bier-bfers* [bier-bfrid] | | | +--ro bier-bfrid bier:bfr-id | | +--:(m-addr) | | +--ro vpn-id? uint32 | | +--ro source-address? inet:ip-address | | +--ro source-wildcard? uint8 | | +--ro group-address? inet:ip-address | | +--ro group-wildcard? uint8 | +--ro target-bfers* [bier-bfrid] | | +--ro bier-bfrid bier:bfr-id | +--ro reply-mode? reply-mode +--ro bier-te-address +--ro bier-te-subdomainid? bier:sub-domain-id +--ro bier-te-bp-info* [bier-te-bsl] | +--ro bier-te-bsl bier:bsl | +--ro bitstring* [si] | | +--ro si bier:si | | +--ro bitpositions* [bitposition] | | +--ro bitposition bier-te:bit-string Chen & Gu Expires August 15, 2018 [Page 6] Internet-Draft BIER RPCs YANG February 2018 | +--ro fec-stack-type* [si] | +--ro si bier:si | +--ro fec-stack-info* [bitposition] | +--ro bitposition bier-te:bit-string | +--ro (fec-stack-type) | +--:(connected) | | +--ro local-bfr? inet:ip-address | | +--ro local-interface? if:interface-ref | +--:(routed) | | +--ro routed-bfr? inet:ip-address | +--:(local-decap) | +--ro bfer? inet:ip-address +--ro reply-mode-te? reply-mode augment /coam-methods:path-discovery/coam-methods:output/coam-methods:path-trace-info/coam-methods:path-trace-info-list: +--ro bier-address | +--ro (bier-address)? | | +--:(bfrs) | | | +--ro bier-bsl? bier:bsl | | | +--ro bier-subdomainid? bier:sub-domain-id | | | +--ro bfir? bier:bfr-id | | | +--ro bier-bfers* [bier-bfrid] | | | +--ro bier-bfrid bier:bfr-id | | +--:(m-addr) | | +--ro vpn-id? uint32 | | +--ro source-address? inet:ip-address | | +--ro source-wildcard? uint8 | | +--ro group-address? inet:ip-address | | +--ro group-wildcard? uint8 | +--ro target-bfers* [bier-bfrid] | | +--ro bier-bfrid bier:bfr-id | +--ro reply-mode? reply-mode +--ro bier-te-address | +--ro bier-te-subdomainid? bier:sub-domain-id | +--ro bier-te-bp-info* [bier-te-bsl] | | +--ro bier-te-bsl bier:bsl | | +--ro bitstring* [si] | | | +--ro si bier:si | | | +--ro bitpositions* [bitposition] | | | +--ro bitposition bier-te:bit-string | | +--ro fec-stack-type* [si] | | +--ro si bier:si | | +--ro fec-stack-info* [bitposition] | | +--ro bitposition bier-te:bit-string | | +--ro (fec-stack-type) | | +--:(connected) | | | +--ro local-bfr? inet:ip-address | | | +--ro local-interface? if:interface-ref | | +--:(routed) Chen & Gu Expires August 15, 2018 [Page 7] Internet-Draft BIER RPCs YANG February 2018 | | | +--ro routed-bfr? inet:ip-address | | +--:(local-decap) | | +--ro bfer? inet:ip-address | +--ro reply-mode-te? reply-mode +--ro bier-response +--ro ttl? int16 +--ro responder-bfr? inet:ip-address 3. Overview the bier rpcs model There are seven parts of the bier rpcs data model. o This Module augments the "coam-methods:continuity-check/coam- methods:input/coam-methods:destination-tp:" with a bier-address container and bier-te address container. The Containers define all the input parameters related to 'continuity-check' operation. o This Module augments the "coam-methods:continuity-check/coam- methods:output/coam-methods:src-test-point: " with a bier-address container and bier-te address container. The Containers define all the output src-test-point parameters related to 'continuity- check' operation. o This Module augments the "coam-methods:continuity-check/coam- methods:output/coam-methods:dest-test-point: " with a bier-address container and bier-te address container. The Containers define all the output dest-test-point parameters related to 'continuity- check' operation. o This Module augments the " coam-methods:path-discovery/coam- methods:input/coam-methods:destination-tp: " with a bier-address container and bier-te address container. The Containers define all the input parameters related to 'path-discovery' operation. o This Module augments the "coam-methods:path-discovery/coam- methods:output/coam-methods:src-test-point: " with a bier-address container and bier-te address container. The Containers define all the output src-test-point parameters related to 'path- discovery' operation. o This Module augments the "coam-methods:path-discovery/coam- methods:output/coam-methods:dest-test-point: " with a bier-address container and bier-te address container. The Containers define all the output dest-test-point parameters related to 'path- discovery' operation. Chen & Gu Expires August 15, 2018 [Page 8] Internet-Draft BIER RPCs YANG February 2018 o This Module augments the "coam-methods:path-discovery/coam- methods:output/coam-methods:path-trace-info/coam-methods:path- trace-info-list" with a bier-address container,bier-te address container and bier-response container. The Containers define all the output path trace infomation list related to 'path-discovery' operation. 4. BIER YANG Data Model file "ietf-bier-rpcs@2018-02-08.yang" module ietf-bier-rpcs { namespace "urn:ietf:params:xml:ns:yang:ietf-bier-rpcs"; prefix bier-rpcs; import ietf-bier { prefix bier; } import ietf-bier-te{ prefix bier-te; } import ietf-connectionless-oam-methods { prefix coam-methods; } import ietf-inet-types { prefix "inet"; } import ietf-interfaces { prefix if; } import ietf-multicast-information { prefix multicast-info; } organization "IETF BIER(Bit Indexed Explicit Replication ) Working Group"; contact "WG List: WG Chair: Tony Przygienda Chen & Gu Expires August 15, 2018 [Page 9] Internet-Draft BIER RPCs YANG February 2018 WG Chair: Greg Shepherd Editor: Ran Chen Editor: Min Gu "; description "The YANG module defines BIER RPCs data model."; revision 2018-02-08{ description "00 revision"; reference "RFC XXXX: YANG module defines BIER RPCs data model."; } typedef reply-mode { type enumeration{ enum "do not Reply"{ value 1; description "reply mode is do not reply"; } enum "reply via IPv4/IPv6 UDP packet"{ value 2; description "reply mode is via IPv4/IPv6 UDP packet."; } enum "reply via BIER-TE packet"{ value 3; description "reply mode is via BIER-TE packet."; } } description "Reply mode."; } grouping general-multicast { description "The general multicast address information."; leaf source-address { type inet:ip-address; description "The address of multicast source. The value set to zero means that the receiver interests in all source that relevant to one group."; } Chen & Gu Expires August 15, 2018 [Page 10] Internet-Draft BIER RPCs YANG February 2018 leaf source-wildcard { type uint8; description "The wildcard information of source."; } leaf group-address { type inet:ip-address; description "The address of multicast group."; } leaf group-wildcard { type uint8; description "The wildcard information of group."; } } grouping m-addr { description "The vpn multicast information."; leaf vpn-id { type uint32; description "The vpn-id of the multicast flow. If there is global instance, the vpnid value should be zero."; } uses general-multicast; } grouping bier-address{ description "bier test point address."; choice bier-address { case bfrs { description "use bfrs as address."; leaf bier-bsl{ type bier:bsl; description "bier bitstringlength."; } leaf bier-subdomainid { type bier:sub-domain-id; description "bier sub-domain id."; } leaf bfir { type bier:bfr-id; description "bier bfir id."; } Chen & Gu Expires August 15, 2018 [Page 11] Internet-Draft BIER RPCs YANG February 2018 list bier-bfers { key bier-bfrid; leaf bier-bfrid { type bier:bfr-id; description "bier bfr identifier."; } description "bier BFERs."; } } case m-addr { description "use multicast flow address as address."; uses multicast-info:m-addr; } description "BIER address." ; } list target-bfers { key bier-bfrid; leaf bier-bfrid { type bier:bfr-id; description "bier bfr identifier."; } description "target BFERs."; } leaf reply-mode{ type reply-mode; description "reply mode."; } } grouping bier-te-address{ description "bier-te test point address."; leaf bier-te-subdomainid { type bier:sub-domain-id; description "bier-te sub-domain id."; } list bier-te-bp-info { key "bier-te-bsl"; description Chen & Gu Expires August 15, 2018 [Page 12] Internet-Draft BIER RPCs YANG February 2018 "bier-te bitpositions information."; leaf bier-te-bsl{ type bier:bsl; description "bier bitstringlength."; } list bitstring{ key "si"; description "The bitstring of BIER-TE path."; leaf si { type bier:si; description "The set identifier of this forwarding item."; } list bitpositions { key "bitposition"; description "the list of bitposition information."; leaf bitposition{ type bier-te:bit-string; description "the bitposition information."; } } } list fec-stack-type{ key "si"; description "The FEC stack info."; leaf si { type bier:si; description "The set identifier of this forwarding item."; } list fec-stack-info { key "bitposition"; description "the choice of fec stack type."; leaf bitposition{ type bier-te:bit-string; description "the bitposition information."; } choice fec-stack-type{ mandatory true; case connected { description "The type of adjacency is connected. Mostly connected interfaces."; Chen & Gu Expires August 15, 2018 [Page 13] Internet-Draft BIER RPCs YANG February 2018 leaf local-bfr{ type inet:ip-address; description "the local bfr identifier."; } leaf local-interface{ type if:interface-ref; description "the local interface."; } } case routed { description "The type of adjacency is routed. Mostly not connected interfaces."; leaf routed-bfr{ type inet:ip-address; description "the loopback address of bfr."; } } case local-decap { description "Means that the packet should be decapsulated and forward out BIER domain."; leaf bfer{ type inet:ip-address; description "bfer indentifier."; } } description "FEC stack type."; } } } } leaf reply-mode-te{ type reply-mode; description "the reply mode."; } } identity tp-address-technology-type { Chen & Gu Expires August 15, 2018 [Page 14] Internet-Draft BIER RPCs YANG February 2018 description "Test point address type"; } identity bier-address-type { base tp-address-technology-type; description "bier address address type"; } identity bier-te-address-type { base tp-address-technology-type; description "bier te address address type"; } augment /coam-methods:continuity-check/coam-methods:input/coam-methods:destination-tp{ description "augment the connectionless oam methods yang for input CC destination test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } } augment /coam-methods:continuity-check/coam-methods:output/coam-methods:src-test-point{ description "augment the connectionless oam methods yang for output CC source test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description Chen & Gu Expires August 15, 2018 [Page 15] Internet-Draft BIER RPCs YANG February 2018 "bier te Address."; } } augment /coam-methods:continuity-check/coam-methods:output/coam-methods:dest-test-point{ description "augment the connectionless oam methods yang for output CC destination test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } } augment /coam-methods:path-discovery/coam-methods:input/coam-methods:destination-tp { description "augment the connectionless oam methods yang for input path-discovery destination test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } } augment /coam-methods:path-discovery/coam-methods:output/coam-methods:src-test-point{ description "augment the connectionless oam methods yang for output path-discovery src test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } Chen & Gu Expires August 15, 2018 [Page 16] Internet-Draft BIER RPCs YANG February 2018 } augment "/coam-methods:path-discovery/coam-methods:output/coam-methods:dest-test-point"{ description "augment the connectionless oam methods yang for output path-discovery destination test point address"; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } } augment /coam-methods:path-discovery/coam-methods:output/coam-methods:path-trace-info/coam-methods:path-trace-info-list{ description "augment the connectionless oam methods yang for output path trace info."; container bier-address { uses bier-address; description "bier Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } container bier-te-address { uses bier-te-address; description "bier te Address."; } container bier-response{ leaf ttl{ type int16; description "TTL is "; } leaf responder-bfr{ type inet:ip-address; description Chen & Gu Expires August 15, 2018 [Page 17] Internet-Draft BIER RPCs YANG February 2018 "Responder bfr."; } description "Bier response."; } } } 5. Security Considerations TBD. 6. Acknowledgements We would like to thank IJsbrand Wijnands, Reshad Rahman and Giles Heron for their comments and support of this work. 7. IANA Considerations This document requires no IANA Actions. Please remove this section before RFC publication. 8. Normative references [I-D.ietf-bier-architecture] Wijnands, I., Rosen, E., Dolganow, A., Przygienda, T., and S. Aldrin, "Multicast using Bit Index Explicit Replication", draft-ietf-bier-architecture-08 (work in progress), September 2017. [I-D.ietf-bier-bier-yang] Chen, R., hu, f., Zhang, Z., dai.xianxian@zte.com.cn, d., and M. Sivakumar, "YANG Data Model for BIER Protocol", draft-ietf-bier-bier-yang-03 (work in progress), February 2018. [I-D.ietf-bier-te-arch] Eckert, T., Cauchie, G., Braun, W., and M. Menth, "Traffic Engineering for Bit Index Explicit Replication (BIER-TE)", draft-ietf-bier-te-arch-00 (work in progress), January 2018. Chen & Gu Expires August 15, 2018 [Page 18] Internet-Draft BIER RPCs YANG February 2018 [I-D.ietf-lime-yang-connectionless-oam-methods] Kumar, D., Wang, Z., Wu, Q., Rahman, R., and S. Raghavan, "Retrieval Methods YANG Data Model for the Management of Operations, Administration, and Maintenance (OAM) Protocols that use Connectionless Communications", draft- ietf-lime-yang-connectionless-oam-methods-13 (work in progress), November 2017. [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, . [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, . Authors' Addresses Ran Chen ZTE Corporation No.50 Software Avenue,Yuhuatai District Nanjing, Jiangsu Province 210012 China Phone: +86 025 88014636 Email: chen.ran@zte.com.cn Min Gu ZTE Corporation No.50 Software Avenue,Yuhuatai District Nanjing, Jiangsu Province 210012 China Chen & Gu Expires August 15, 2018 [Page 19]