draft-ietf-spring-sr-yang-11.txt   draft-ietf-spring-sr-yang-12.txt 
SPRING Working Group S. Litkowski SPRING Working Group S. Litkowski
Internet-Draft Orange Business Service Internet-Draft Orange Business Service
Intended status: Standards Track Y. Qu Intended status: Standards Track Y. Qu
Expires: August 19, 2019 Huawei Expires: September 1, 2019 Huawei
A. Lindem
Cisco
P. Sarkar P. Sarkar
Individual Individual
J. Tantsura J. Tantsura
Apstra Apstra
A. Lindem February 28, 2019
Cisco
February 15, 2019
YANG Data Model for Segment Routing YANG Data Model for Segment Routing
draft-ietf-spring-sr-yang-11 draft-ietf-spring-sr-yang-12
Abstract Abstract
This document defines a YANG data model ([RFC6020], [RFC7950]) for This document defines a YANG data model ([RFC6020], [RFC7950]) for
segment routing ([RFC8402]) configuration and operation. This YANG segment routing ([RFC8402]) configuration and operation. This YANG
model is intended to be used on network elements to configure or model is intended to be used on network elements to configure or
operate segment routing. This document defines also generic operate segment routing. This document defines also generic
containers that SHOULD be reused by IGP protocol modules to support containers that SHOULD be reused by IGP protocol modules to support
segment routing. segment routing.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 19, 2019. This Internet-Draft will expire on September 1, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
skipping to change at page 2, line 31 skipping to change at page 2, line 31
3. Design of the Data Model . . . . . . . . . . . . . . . . . . 3 3. Design of the Data Model . . . . . . . . . . . . . . . . . . 3
4. Configuration . . . . . . . . . . . . . . . . . . . . . . . . 5 4. Configuration . . . . . . . . . . . . . . . . . . . . . . . . 5
5. IGP Control plane configuration . . . . . . . . . . . . . . . 6 5. IGP Control plane configuration . . . . . . . . . . . . . . . 6
5.1. IGP interface configuration . . . . . . . . . . . . . . . 7 5.1. IGP interface configuration . . . . . . . . . . . . . . . 7
5.1.1. Adjacency SID properties . . . . . . . . . . . . . . 7 5.1.1. Adjacency SID properties . . . . . . . . . . . . . . 7
5.1.1.1. Bundling . . . . . . . . . . . . . . . . . . . . 7 5.1.1.1. Bundling . . . . . . . . . . . . . . . . . . . . 7
5.1.1.2. Protection . . . . . . . . . . . . . . . . . . . 8 5.1.1.2. Protection . . . . . . . . . . . . . . . . . . . 8
6. States . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6. States . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7. Notifications . . . . . . . . . . . . . . . . . . . . . . . . 8 7. Notifications . . . . . . . . . . . . . . . . . . . . . . . . 8
8. YANG Module . . . . . . . . . . . . . . . . . . . . . . . . . 8 8. YANG Module . . . . . . . . . . . . . . . . . . . . . . . . . 8
9. Security Considerations . . . . . . . . . . . . . . . . . . . 28 9. Security Considerations . . . . . . . . . . . . . . . . . . . 25
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 28 10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 25
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28 11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 25
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 28 12. References . . . . . . . . . . . . . . . . . . . . . . . . . 25
12.1. Normative References . . . . . . . . . . . . . . . . . . 28 12.1. Normative References . . . . . . . . . . . . . . . . . . 25
12.2. Informative References . . . . . . . . . . . . . . . . . 30 12.2. Informative References . . . . . . . . . . . . . . . . . 26
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 30 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction 1. Introduction
This document defines a YANG data model for segment routing This document defines a YANG data model for segment routing
configuration and operation. This document does not define the IGP configuration and operation. This document does not define the IGP
extensions to support segment routing but defines generic groupings extensions to support segment routing but defines generic groupings
that SHOULD be reused by IGP extension modules. The reason of this that SHOULD be reused by IGP extension modules. The reason of this
design choice is to not require implementations to support all IGP design choice is to not require implementations to support all IGP
extensions. For example, an implementation may support IS-IS extensions. For example, an implementation may support IS-IS
extension but not OSPF. extension but not OSPF.
skipping to change at page 8, line 48 skipping to change at page 8, line 48
prefixes). prefixes).
o segment-routing-index-out-of-range: Raised when a control plane o segment-routing-index-out-of-range: Raised when a control plane
advertised index fall outside the range of SRGBs configured for advertised index fall outside the range of SRGBs configured for
the network device. the network device.
8. YANG Module 8. YANG Module
The following RFCs and drafts are not referenced in the document text The following RFCs and drafts are not referenced in the document text
but are referenced in the ietf-segment-rouuting-common.yang and/or but are referenced in the ietf-segment-rouuting-common.yang and/or
ietf-segment-routing.yang module: [RFC6991], [RFC8294], and ietf-segment-routing.yang module: [RFC6991], [RFC8294], [RFC8476],
[RFC8476]. and [RFC8491].
<CODE BEGINS> file "ietf-segment-routing-common@2019-02-15.yang"
module ietf-segment-routing-common {
namespace "urn:ietf:params:xml:ns:yang:ietf-segment-routing-common";
prefix sr-cmn;
import ietf-inet-types {
prefix inet;
}
organization
"IETF SPRING - SPRING Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/spring/>
WG List: <mailto:spring@ietf.org>
Editor: Stephane Litkowski
<mailto:stephane.litkowski@orange.com>
Editor: Yingzhen Qu
<mailto:yingzhen.qu@huawei.com>
Author: Acee Lindem
<mailto:acee@cisco.com>
Author: Pushpasis Sarkar
<mailto:pushpasis.ietf@gmail.com>
Author: Jeff Tantsura
<jefftant.ietf@gmail.com>
";
description
"The YANG module defines a collection of types and groupings for
Segment routing.
Copyright (c) 2017 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 XXXX;
see the RFC itself for full legal notices.";
reference "RFC XXXX"; <CODE BEGINS> file "ietf-segment-routing-common@2019-02-28.yang"
module ietf-segment-routing-common {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-segment-routing-common";
prefix sr-cmn;
revision 2019-02-15 { import ietf-inet-types {
description prefix inet;
" }
* Addressed YANG Doctor's review comments;
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2018-06-25 { organization
description "IETF SPRING - SPRING Working Group";
"
* Renamed readable-label-stack-depth to
* entropy-readable-label-depth;
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2017-07-01 {
description
"
*Conform to RFC6087BIS Appendix C
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2017-03-10 {
description
"
* Add support of SRLB
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-10-28 {
description
"
* Add support of MSD (Maximum SID Depth)
* Update contact info
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-10-24 {
description
"Initial";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
feature sid-last-hop-behavior { contact
description "WG Web: <http://tools.ietf.org/wg/spring/>
"Configurable last hop behavior."; WG List: <mailto:spring@ietf.org>
}
identity segment-routing-transport { Editor: Stephane Litkowski
description <mailto:stephane.litkowski@orange.com>
"Base identity for segment routing transport."; Editor: Yingzhen Qu
} <mailto:yingzhen.qu@huawei.com>
identity segment-routing-transport-mpls { Author: Acee Lindem
base segment-routing-transport; <mailto:acee@cisco.com>
description Author: Pushpasis Sarkar
"This identity represents MPLS transport for segment <mailto:pushpasis.ietf@gmail.com>
routing."; Author: Jeff Tantsura
} <jefftant.ietf@gmail.com>
identity segment-routing-transport-ipv6 { ";
base segment-routing-transport; description
description "The YANG module defines a collection of generic types and
"This identity represents IPv6 transport for segment grouping for Segment Routing (SR) as described in RFC 8402.
routing.";
}
identity prefix-sid-algorithm { Copyright (c) 2019 IETF Trust and the persons identified as
description authors of the code. All rights reserved.
"Base identity for prefix-sid algorithm.";
}
identity prefix-sid-algorithm-shortest-path { Redistribution and use in source and binary forms, with or
base prefix-sid-algorithm; without modification, is permitted pursuant to, and subject
description to the license terms contained in, the Simplified BSD License
"The default behavior of prefix-sid algorithm."; set forth in Section 4.c of the IETF Trust's Legal Provisions
} Relating to IETF Documents
(http://trustee.ietf.org/license-info).
identity prefix-sid-algorithm-strict-spf { This version of this YANG module is part of RFC XXXX;
base prefix-sid-algorithm; see the RFC itself for full legal notices.";
description
"This algorithm mandates that the packet is forwared
according to ECMP-aware SPF algorithm.";
}
grouping srlr { reference "RFC XXXX";
description revision 2019-02-28 {
"Grouping for SR Label Range configuration."; description
leaf lower-bound { "Initial version";
type uint32; reference "RFC XXXX: YANG Data Model for Segment Routing.";
description }
"Lower value in the block.";
}
leaf upper-bound {
type uint32;
description
"Upper value in the block.";
} feature sid-last-hop-behavior {
} description
"Configurable last hop behavior.";
}
grouping srgb { identity segment-routing-transport {
description description
"Grouping for SR Global Label range."; "Base identity for segment routing transport.";
list srgb { }
key "lower-bound upper-bound";
ordered-by user;
description
"List of global blocks to be
advertised.";
uses srlr;
}
}
grouping srlb { identity segment-routing-transport-mpls {
description base segment-routing-transport;
"Grouping for SR Local Block range."; description
list srlb { "This identity represents MPLS transport for segment
key "lower-bound upper-bound"; routing.";
ordered-by user; }
description
"List of SRLBs.";
uses srlr;
}
}
grouping sid-value-type { identity segment-routing-transport-ipv6 {
description base segment-routing-transport;
"Defines how the SID value is expressed."; description
leaf value-type { "This identity represents IPv6 transport for segment
type enumeration { routing.";
enum "index" { }
description
"The value will be
interpreted as an index.";
}
enum "absolute" {
description
"The value will become
interpreted as an absolute
value.";
}
}
default "index";
description
"This leaf defines how value
must be interpreted.";
}
}
grouping prefix-sid { identity prefix-sid-algorithm {
description description
"This grouping defines cfg of prefix SID."; "Base identity for prefix-sid algorithm.";
leaf prefix { }
type inet:ip-prefix;
description
"connected prefix sid.";
}
uses prefix-sid-attributes;
}
grouping ipv4-sid { identity prefix-sid-algorithm-shortest-path {
description base prefix-sid-algorithm;
"This grouping defines ipv4 prefix SID."; description
leaf prefix { "Shortest Path First (SPF) prefix-sid algorithm. This
type inet:ipv4-prefix; is the default algorthm.";
description }
"connected prefix sid.";
}
uses prefix-sid-attributes;
}
grouping ipv6-sid {
description
"This grouping defines ipv6 prefix SID.";
leaf prefix {
type inet:ipv6-prefix;
description
"connected prefix sid.";
}
uses prefix-sid-attributes;
}
grouping last-hop-behavior { identity prefix-sid-algorithm-strict-spf {
description base prefix-sid-algorithm;
"Defines last hop behavior"; description
leaf last-hop-behavior { "This algorithm mandates that the packet is forwarded
if-feature "sid-last-hop-behavior"; according to ECMP-aware SPF algorithm.";
type enumeration { }
enum "explicit-null" { grouping srlr {
description description
"Use explicit-null for the SID."; "Grouping for SR Label Range configuration.";
} leaf lower-bound {
enum "no-php" { type uint32;
description description
"Do no use PHP for the SID."; "Lower value in the label range.";
} }
enum "php" { leaf upper-bound {
description type uint32;
"Use PHP for the SID."; description
} "Upper value in the label range.";
} }
description }
"Configure last hop behavior.";
}
}
grouping node-capabilities { grouping srgb {
description description
"Containing SR node capabilities."; "Grouping for SR Global Label range.";
container node-capabilities { list srgb {
config false; key "lower-bound upper-bound";
description ordered-by user;
"Shows the SR capability of the node."; description
list transport-planes { "List of global blocks to be advertised.";
key "transport-plane"; uses srlr;
description }
"List of supported transport planes."; }
leaf transport-plane {
type identityref {
base segment-routing-transport;
}
description
"Transport plane supported";
}
}
leaf entropy-readable-label-depth {
type uint8;
description
"Maximum label statck depth that
the router can read. ";
}
}
}
grouping prefix-sid-attributes { grouping srlb {
description description
"Containing SR attributes for a prefix."; "Grouping for SR Local Block range.";
uses sid-value-type; list srlb {
leaf start-sid { key "lower-bound upper-bound";
type uint32; ordered-by user;
mandatory true; description
description "List of SRLBs.";
"Value associated with uses srlr;
prefix. The value must }
be interpreted in the }
context of value-type.";
}
leaf range {
type uint32;
description
"Describes how many SIDs could be
allocated.";
}
leaf algorithm {
type identityref {
base prefix-sid-algorithm;
}
description
"Prefix-sid algorithm.";
}
}
}
<CODE ENDS>
<CODE BEGINS> file "ietf-segment-routing@2019-02-15.yang"
module ietf-segment-routing {
namespace "urn:ietf:params:xml:ns:yang:ietf-segment-routing";
prefix sr;
import ietf-inet-types { grouping sid-value-type {
prefix inet; description
} "Defines how the SID value is expressed.";
import ietf-yang-types { leaf value-type {
prefix yang; type enumeration {
} enum "index" {
import ietf-routing { description
prefix rt; "The value will be interpreted as an index.";
} }
import ietf-interfaces { enum "absolute" {
prefix if; description
} "The value will become interpreted as an absolute
import ietf-routing-types { value.";
prefix rt-types; }
} }
import ietf-segment-routing-common { default "index";
prefix sr-cmn; description
} "This leaf defines how value must be interpreted.";
}
}
organization grouping prefix-sid {
"IETF SPRING - SPRING Working Group"; description
contact "This grouping defines cfg of prefix SID.";
"WG Web: <http://tools.ietf.org/wg/spring/> leaf prefix {
WG List: <mailto:spring@ietf.org> type inet:ip-prefix;
description
"connected prefix sid.";
}
uses prefix-sid-attributes;
}
Editor: Stephane Litkowski grouping ipv4-sid {
<mailto:stephane.litkowski@orange.com> description
Editor: Yingzhen Qu "Grouping for an IPv4 prefix SID.";
<mailto:yingzhen.qu@huawei.com> leaf prefix {
type inet:ipv4-prefix;
description
"Connected IPv4 prefix sid.";
}
uses prefix-sid-attributes;
}
grouping ipv6-sid {
description
"Grouping for an IPv6 prefix SID.";
leaf prefix {
type inet:ipv6-prefix;
description
"Connected ipv6 prefix sid.";
}
uses prefix-sid-attributes;
}
Author: Acee Lindem grouping last-hop-behavior {
<mailto:acee@cisco.com> description
Author: Pushpasis Sarkar "Defines last hop behavior";
<mailto:pushpasis.ietf@gmail.com> leaf last-hop-behavior {
Author: Jeff Tantsura if-feature "sid-last-hop-behavior";
<jefftant.ietf@gmail.com> type enumeration {
enum "explicit-null" {
description
"Use explicit-null for the SID.";
}
enum "no-php" {
description
"Do not use Penultimate Hop Popping (PHP)
for the SID.";
}
enum "php" {
description
"Use PHP for the SID.";
}
}
description
"Configure last hop behavior.";
}
}
"; grouping node-capabilities {
description description
"The YANG module defines a generic configuration model for "Containing SR node capabilities.";
Segment routing common across all of the vendor container node-capabilities {
implementations. config false;
description
"Shows the SR capability of the node.";
list transport-planes {
key "transport-plane";
description
"List of supported transport planes.";
leaf transport-plane {
type identityref {
base segment-routing-transport;
}
description
"Transport plane supported";
}
}
leaf entropy-readable-label-depth {
type uint8;
description
"Maximum label stack depth that a router can read.";
}
}
}
grouping prefix-sid-attributes {
description
"Grouping for Segment Routing (SR) prefix attributes.";
uses sid-value-type;
leaf start-sid {
type uint32;
mandatory true;
description
"Value associated with prefix. The value must be
interpreted in the context of value-type.";
}
leaf range {
type uint32;
description
"Indicates how many SIDs can be allocated.";
}
leaf algorithm {
type identityref {
base prefix-sid-algorithm;
}
description
"Prefix-sid algorithm.";
}
}
}
<CODE ENDS>
<CODE BEGINS> file "ietf-segment-routing@2019-02-28.yang"
module ietf-segment-routing {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-segment-routing";
prefix sr;
Copyright (c) 2018 IETF Trust and the persons identified as import ietf-inet-types {
authors of the code. All rights reserved. prefix inet;
}
import ietf-routing {
prefix rt;
}
import ietf-interfaces {
prefix if;
}
import ietf-routing-types {
prefix rt-types;
}
import ietf-segment-routing-common {
prefix sr-cmn;
}
organization
"IETF SPRING - SPRING Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/spring/>
WG List: <mailto:spring@ietf.org>
Redistribution and use in source and binary forms, with or Editor: Stephane Litkowski
without modification, is permitted pursuant to, and subject <mailto:stephane.litkowski@orange.com>
to the license terms contained in, the Simplified BSD License Editor: Yingzhen Qu
set forth in Section 4.c of the IETF Trust's Legal Provisions <mailto:yingzhen.qu@huawei.com>
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; Author: Acee Lindem
see the RFC itself for full legal notices."; <mailto:acee@cisco.com>
Author: Pushpasis Sarkar
<mailto:pushpasis.ietf@gmail.com>
Author: Jeff Tantsura
<jefftant.ietf@gmail.com>
reference "RFC XXXX"; ";
description
"The YANG module defines a generic configuration model for
Segment routing common across all of the vendor
implementations.
revision 2019-02-15 { Copyright (c) 2019 IETF Trust and the persons identified as
description authors of the code. All rights reserved.
"
* Addressed YANG Doctor's review comments;
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2018-06-25 { Redistribution and use in source and binary forms, with or
description without modification, is permitted pursuant to, and subject
""; to the license terms contained in, the Simplified BSD License
reference "RFC XXXX: YANG Data Model for Segment Routing."; 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 XXXX;
revision 2017-07-01 { see the RFC itself for full legal notices.";
description
"
* Implement NMDA model
*Conform to RFC6087BIS Appendix C
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2017-03-10 { reference "RFC XXXX";
description
"
* Change global-sid-list to sid-list and add a leaf scope
* Added support of SRLB
* Added support of local sids
* fixed indentations
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-10-28 {
description
"
* Add support of MSD (Maximum SID Depth)
* Update contact info
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-10-24 {
description
"
* Moved common SR types and groupings to a seperate module
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-07-07 {
description
"
* Add support of prefix-sid algorithm configuration
* change routing-protocols to control-plane-protocols
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2016-03-17 {
description
"
* Add notification segment-routing-global-srgb-collision
* Add router-id to segment-routing-global-sid-collision
* Remove routing-instance
* Add typedef router-id
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2015-10-17 {
description
"
* Add per-protocol SRGB config feature
* Move SRBG config to a grouping
";
reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
revision 2015-06-22 {
description
"
* Prefix SID config moved to
connected-prefix-sid-map in global SR cfg
rather than IGP.
";
reference "draft-litkowski-spring-sr-yang-01";
}
revision 2015-04-23 {
description
"
* Node flag deprecated from prefixSID
* SR interface cfg moved to protocol
* Adding multiple binding policies for SRMS
";
reference "";
}
revision 2015-02-27 {
description
"Initial";
reference "draft-litkowski-spring-sr-yang-00";
}
feature mapping-server { revision 2019-02-28 {
description description
"Support of Segment Routing Mapping Server (SRMS)."; "Initial Version";
} reference "RFC XXXX: YANG Data Model for Segment Routing.";
}
feature mapping-server {
description
"Support for Segment Routing Mapping Server (SRMS).";
}
feature protocol-srgb {
description
"Support for per-protocol Segment Routing Global Block
(SRGB) configuration.";
}
feature protocol-srgb { feature max-sid-depth {
description description
"Support per-protocol Segment Routing Global Block (SRGB) "Support for signaling MSD (Maximum SID Depth) in IGP.";
configuration."; }
}
feature max-sid-depth {
description
"Support of signaling MSD (Maximum SID Depth) in IGP.";
}
typedef system-id { typedef system-id {
type string { type string {
pattern "[0-9A-Fa-f]{4}\\.[0-9A-Fa-f]{4}\\.[0-9A-Fa-f]{4}\\.00"; pattern
} '[0-9A-Fa-f]{4}\.[0-9A-Fa-f]{4}\.[0-9A-Fa-f]{4}';
description }
"This type defines ISIS system id using pattern, description
system id looks like : 0143.0438.AeF0.00"; "This type defines IS-IS system-id using pattern,
} An example system-id is 0143.0438.AEF0";
}
typedef router-id { typedef router-id {
type union { type union {
type system-id; type system-id;
type rt-types:router-id; type rt-types:router-id;
} }
description description
"OSPF/BGP router id or ISIS system ID."; "OSPF/BGP router-id or ISIS system ID.";
} }
grouping sr-controlplane { grouping sr-controlplane {
description description
"Defines protocol configuration."; "Defines protocol configuration.";
container segment-routing { container segment-routing {
description description
"segment routing global config."; "Segment Routing global configuration.";
leaf enabled { leaf enabled {
type boolean; type boolean;
default "false"; default "false";
description description
"Enables segment-routing "Enables segment-routing protocol extensions.";
protocol extensions."; }
} container bindings {
container bindings { description
description "Control of binding advertisement and reception.";
"Control of binding advertisement container advertise {
and reception."; description
container advertise { "Control advertisement of local mappings
description in binding TLVs.";
"Authorize the advertise leaf-list policies {
of local mappings in binding TLV."; type string;
leaf-list policies { description
type string; "List of binding advertisement policies.";
description }
"List of policies to be advertised."; }
leaf receive {
type boolean;
default "true";
description
"Allow the reception and usage of binding TLVs.";
}
}
}
}
} grouping igp-interface {
} description
leaf receive { "Grouping for IGP interface configuration.";
type boolean; container segment-routing {
default "true"; description
description "Container for SR interface configuration.";
"Authorize the reception and usage container adjacency-sid {
of binding TLV."; description
} "Adjacency SID configuration.";
} list advertise-adj-group-sid {
} key "group-id";
} description
"Control advertisement of S flag. Enable advertisement
of a common Adj-SID for parallel links.";
leaf group-id {
type uint32;
description
"The value is an internal value to identify a
group-ID. Interfaces with the same group-ID will be
bundled together.";
}
}
leaf advertise-protection {
type enumeration {
enum "single" {
description
"A single Adj-SID is associated with the adjacency
and reflects the protection configuration.";
}
enum "dual" {
description
"Two Adj-SIDs will be associated with the adjacency
if the interface is protected. In this case, will
be advertised with backup flag set, the other will
be advertised with theo backup flag clear. In case
protection is not configured, single Adj-SID will
be advertised with the backup flag clear.";
}
}
description
"If set, the Adj-SID refers to a protected adjacency.";
}
}
}
}
grouping igp-interface { grouping max-sid-depth {
description description
"Grouping for IGP interface cfg."; "Maximum SID Depth (MSD)D configuration grouping.";
container segment-routing { leaf node-msd {
description type uint8;
"container for SR interface cfg."; description
container adjacency-sid { "Node MSD is the lowest MSD supported by the node.";
description }
"Defines the adjacency SID properties."; container link-msd {
list advertise-adj-group-sid { description
key "group-id"; "MSD supported by an individual interface.";
description list link-msds {
"Control advertisement of S flag. key "interface";
Enable to advertise a common Adj-SID description
for parallel links."; "List of link MSDs.";
leaf group-id { leaf interface {
type uint32; type if:interface-ref;
description description
"The value is an internal value to identify "Reference to device interface.";
a group-ID. Interfaces with the same }
group-ID will be bundled together."; leaf msd {
} type uint8;
} description
leaf advertise-protection { "MSD supported by the interface.";
type enumeration { }
enum "single" { }
description }
"A single Adj-SID is associated }
with the adjacency and reflects
the protection configuration.";
}
enum "dual" {
description
"Two Adj-SIDs will be associated
with the adjacency if interface
is protected. In this case
one will be enforced with
backup flag set, the other
will be enforced to backup flag unset.
In case, protection is not configured,
a single Adj-SID will be advertised
with backup flag unset.";
}
}
description
"If set, the Adj-SID refers to an
adjacency being protected.";
}
}
}
}
grouping max-sid-depth { augment "/rt:routing" {
description description
"MSD configuration grouping."; "This augments routing data model (RFC 8349)
leaf node-msd { with Segment Routing (SR).";
type uint8;
description
"Node MSD is the lowest MSD supported by the node.";
}
container link-msd {
description
"Link MSD is a number representing the particular link
MSD value.";
list link-msds {
key "interface";
description
"List of link MSDs.";
leaf interface {
type if:interface-ref;
description
"Name of the interface.";
}
leaf msd {
type uint8;
description
"SID depth of the interface associated with the link.";
}
}
}
}
augment "/rt:routing" { container segment-routing {
description description
"This augments routing data model (RFC 8349) "Segment Routing global configuration.";
with segment-routing."; leaf transport-type {
container segment-routing { type identityref {
description base sr-cmn:segment-routing-transport;
"segment routing global config."; }
leaf transport-type { default "sr-cmn:segment-routing-transport-mpls";
type identityref { description
base sr-cmn:segment-routing-transport; "Dataplane to be used.";
} }
default "sr-cmn:segment-routing-transport-mpls"; uses sr-cmn:node-capabilities;
description container msd {
"Dataplane to be used."; if-feature "max-sid-depth";
} description
uses sr-cmn:node-capabilities; "MSD configuration.";
container msd { uses max-sid-depth;
if-feature "max-sid-depth"; }
description container bindings {
"MSD configuration."; description
uses max-sid-depth; "List of bindings.";
} container mapping-server {
container bindings { if-feature "mapping-server";
description description
"List of bindings."; "Configuration of mapping-server local entries.";
container mapping-server { list policy {
if-feature "mapping-server"; key "name";
description description
"Configuration of mapping-server "List mapping-server policies.";
local entries."; leaf name {
list policy { type string;
key "name"; description
description "Name of the mapping policy.";
"Definition of mapping policy."; }
leaf name { container entries {
type string; description
description "IPv4/IPv6 mapping entries.";
"Name of the mapping policy."; list mapping-entry {
} key "prefix algorithm";
container entries { description
description "Mapping entries.";
"IPv4/IPv6 mapping entries."; uses sr-cmn:prefix-sid;
list mapping-entry { }
key "prefix algorithm"; }
description }
"Mapping entries."; }
uses sr-cmn:prefix-sid; container connected-prefix-sid-map {
} description
} "Prefix SID configuration.";
list connected-prefix-sid {
key "prefix algorithm";
description
"List of prefix SID mapped to IPv4/IPv6
local prefixes.";
uses sr-cmn:prefix-sid;
uses sr-cmn:last-hop-behavior;
}
}
container local-prefix-sid {
description
"Local sid configuration.";
list local-prefix-sid {
key "prefix algorithm";
description
"List of local IPv4/IPv6 prefix-sids.";
uses sr-cmn:prefix-sid;
}
}
}
container global-srgb {
description
"Global SRGB configuration.";
uses sr-cmn:srgb;
}
container srlb {
description
"Segment Routing Local Block (SRLB) configuration.";
uses sr-cmn:srlb;
}
} list label-blocks {
} config false;
container connected-prefix-sid-map { description
description "List of label blocks currently in use.";
"Prefix SID configuration."; leaf lower-bound {
list connected-prefix-sid { type uint32;
key "prefix algorithm"; description
description "Lower bound of the label block.";
"List of prefix SID mapped to }
ipv4/ipv6 local prefixes."; leaf upper-bound {
uses sr-cmn:prefix-sid; type uint32;
uses sr-cmn:last-hop-behavior; description
} "Upper bound of the label block.";
} }
container local-prefix-sid { leaf size {
description type uint32;
"Local sid configuration."; description
list local-prefix-sid { "Number of indexes in the block.";
key "prefix algorithm"; }
description leaf free {
"List of local ipv4/ipv6 prefix-sid."; type uint32;
uses sr-cmn:prefix-sid; description
} "Number of free indexes in the block.";
} }
} leaf used {
container global-srgb { type uint32;
description description
"Global SRGB configuration."; "Number of indexes in use in the block.";
uses sr-cmn:srgb; }
} leaf scope {
container srlb { type enumeration {
description enum "global" {
"SR Local Block configuration."; description
uses sr-cmn:srlb; "Global SID.";
} }
enum "local" {
description
"Local SID.";
}
}
description
"Scope of this label block.";
}
}
container sid-list {
config false;
description
"List of prefix and SID associations.";
list sid {
key "target sid source source-protocol binding-type";
ordered-by system;
description
"SID Binding.";
leaf target {
type string;
description
"Defines the target of the binding. It can be a
prefix or something else.";
}
leaf sid {
type uint32;
description
"Index associated with the prefix.";
}
leaf algorithm {
type uint8;
description
"Algorithm to be used for the prefix SID.";
}
leaf source {
type inet:ip-address;
description
"IP address of the router that owns the binding.";
}
leaf used {
type boolean;
description
"Indicates if the binding is install in the
forwarding plane.";
}
leaf source-protocol {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name";
}
description
"Routing protocol that owns the binding";
}
leaf binding-type {
type enumeration {
enum "prefix-sid" {
description
"Binding is learned from a prefix SID.";
}
enum "binding-tlv" {
description
"Binding is learned from a binding TLV.";
}
}
description
"Type of binding.";
}
leaf scope {
type enumeration {
enum "global" {
description
"Global SID.";
}
enum "local" {
description
"Local SID.";
}
list label-blocks { }
config false; description
description "SID scoping.";
"List of labels blocks currently }
in use."; }
leaf lower-bound { }
type uint32; }
description }
"Lower bound of the label block.";
}
leaf upper-bound {
type uint32;
description
"Upper bound of the label block.";
}
leaf size {
type uint32;
description
"Number of indexes in the block.";
}
leaf free {
type uint32;
description
"Number of indexes free in the block.";
}
leaf used {
type uint32;
description
"Number of indexes used in the block.";
}
leaf scope {
type enumeration {
enum "global" {
description
"Global sid.";
}
enum "local" {
description
"Local sid.";
}
}
description
"Scope of this label block.";
}
}
container sid-list {
config false;
description
"List of prefix and SID associations.";
list sid {
key "target sid source source-protocol binding-type";
ordered-by system;
description
"Binding.";
leaf target {
type string;
description
"Defines the target of the binding.
It can be a prefix or something else.";
}
leaf sid {
type uint32;
description
"Index associated with the prefix.";
}
leaf algorithm {
type uint8;
description
"Algorithm to be used for the prefix
SID.";
}
leaf source {
type inet:ip-address;
description
"IP address of the router than own
the binding.";
}
leaf used {
type boolean;
description
"Defines if the binding is used
in forwarding plane.";
}
leaf source-protocol {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name";
}
description
"Rtg protocol that owns the binding";
}
leaf binding-type {
type enumeration {
enum "prefix-sid" {
description
"Binding is learned from
a prefix SID.";
}
enum "binding-tlv" {
description
"Binding is learned from
a binding TLV.";
}
}
description
"Type of binding.";
}
leaf scope {
type enumeration {
enum "global" {
description
"Global sid.";
}
enum "local" {
description
"Local sid.";
}
}
description
"The sid is local or global.";
}
}
}
}
}
notification segment-routing-global-srgb-collision { notification segment-routing-global-srgb-collision {
description description
"This notification is sent when received SRGB blocks from "This notification is sent when SRGB blocks received from
a router conflict."; routers conflict.";
list srgb-collisions { list srgb-collisions {
description description
"List of SRGB blocks that conflict."; "List of SRGB blocks that conflict.";
leaf lower-bound { leaf lower-bound {
type uint32; type uint32;
description description
"Lower value in the block."; "Lower value in the block.";
} }
leaf upper-bound { leaf upper-bound {
type uint32; type uint32;
description description
"Upper value in the block."; "Upper value in the block.";
} }
leaf routing-protocol { leaf routing-protocol {
type leafref { type leafref {
path "/rt:routing/rt:control-plane-protocols/" path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name"; + "rt:control-plane-protocol/rt:name";
} }
description description
"Routing protocol reference that received the event."; "Routing protocol reference for SRGB collision.";
} }
leaf originating-rtr-id { leaf originating-rtr-id {
type router-id; type router-id;
description description
"Originating router id of this SRGB block."; "Originating Router ID of this SRGB block.";
} }
}
}
notification segment-routing-global-sid-collision {
description
"This notification is sent when a new mapping is learned
containing s mapping where the SID is already used.
The notification generation must be throttled with at least
a 5 second gap between notifications.";
leaf received-target {
type string;
description
"Target received in the router advertisement that caused
the SID collision.";
}
leaf new-sid-rtr-id {
type router-id;
description
"Router ID that advertised the conflicting SID.";
}
leaf original-target {
type string;
description
"Target already available in the database with the same SID
as the received target.";
}
leaf original-sid-rtr-id {
type router-id;
description
"Router-ID for the router that originally advertised the
conflicting SID, i.e., the instance in the database.";
}
leaf index {
type uint32;
description
"Value of the index used by two different prefixes.";
}
leaf routing-protocol {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name";
}
description
"Routing protocol reference for conflicting SID.";
}
}
notification segment-routing-index-out-of-range {
description
"This notification is sent when a binding is received
containing a segment index which is out of the local
configured ranges. The notification generation must be
throttled with at least a 5 second gap between
notifications.";
leaf received-target {
type string;
description
"Target received in the router advertisement with
the out-of-range index.";
} }
} leaf received-index {
notification segment-routing-global-sid-collision { type uint32;
description description
"This notification is sent when a new mapping is learned "Value of the index received.";
, containing mapping }
where the SID is already used. leaf routing-protocol {
The notification generation must be throttled with at least type leafref {
a 5 second gap. "; path "/rt:routing/rt:control-plane-protocols/"
leaf received-target { + "rt:control-plane-protocol/rt:name";
type string; }
description description
"Target received in the controlplane that "Routing protocol reference for out-of-range indexd.";
caused SID collision."; }
} }
leaf new-sid-rtr-id { }
type router-id; <CODE ENDS>
description
"Router Id that advertising the conflicting SID.";
}
leaf original-target {
type string;
description
"Target already available in database that have the same SID
as the received target.";
}
leaf original-sid-rtr-id {
type router-id;
description
"Original router ID that advertised the conflicting SID.";
}
leaf index {
type uint32;
description
"Value of the index used by two different prefixes.";
}
leaf routing-protocol {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name";
}
description
"Routing protocol reference that received the event.";
}
}
notification segment-routing-index-out-of-range {
description
"This notification is sent when a binding
is received, containing a segment index
which is out of the local configured ranges.
The notification generation must be throttled with at least
a 5 second gap. ";
leaf received-target {
type string;
description
"Target received in the controlplane
that caused SID collision.";
}
leaf received-index {
type uint32;
description
"Value of the index received.";
}
leaf routing-protocol {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:name";
}
description
"Routing protocol reference that received the event.";
}
}
}
<CODE ENDS>
9. Security Considerations 9. Security Considerations
TBD. TBD.
10. Acknowledgements 10. Acknowledgements
Authors would like to thank Derek Yeung, Acee Lindem, Greg Hankins, Authors would like to thank Derek Yeung, Acee Lindem, Greg Hankins,
Hannes Gredler, Uma Chunduri, Jeffrey Zhang, Shradda Hedge, Les Hannes Gredler, Uma Chunduri, Jeffrey Zhang, Shradda Hedge, Les
Ginsberg for their contributions. Ginsberg for their contributions.
skipping to change at page 29, line 7 skipping to change at page 25, line 43
11. IANA Considerations 11. IANA Considerations
TBD. TBD.
12. References 12. References
12.1. Normative References 12.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc2119>. editor.org/info/rfc2119>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020, the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010, DOI 10.17487/RFC6020, October 2010, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc6020>. editor.org/info/rfc6020>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013, RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>. <https://www.rfc-editor.org/info/rfc6991>.
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016, RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>. <https://www.rfc-editor.org/info/rfc7950>.
[RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger, [RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger,
"Common YANG Data Types for the Routing Area", RFC 8294, "Common YANG Data Types for the Routing Area", RFC 8294,
DOI 10.17487/RFC8294, December 2017, DOI 10.17487/RFC8294, December 2017, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc8294>. editor.org/info/rfc8294>.
[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018, (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>. <https://www.rfc-editor.org/info/rfc8342>.
[RFC8343] Bjorklund, M., "A YANG Data Model for Interface [RFC8343] Bjorklund, M., "A YANG Data Model for Interface
Management", RFC 8343, DOI 10.17487/RFC8343, March 2018, Management", RFC 8343, DOI 10.17487/RFC8343, March 2018,
<https://www.rfc-editor.org/info/rfc8343>. <https://www.rfc-editor.org/info/rfc8343>.
[RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for [RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for
Routing Management (NMDA Version)", RFC 8349, Routing Management (NMDA Version)", RFC 8349,
DOI 10.17487/RFC8349, March 2018, DOI 10.17487/RFC8349, March 2018, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc8349>. editor.org/info/rfc8349>.
[RFC8402] Filsfils, C., Ed., Previdi, S., Ed., Ginsberg, L., [RFC8402] Filsfils, C., Ed., Previdi, S., Ed., Ginsberg, L.,
Decraene, B., Litkowski, S., and R. Shakir, "Segment Decraene, B., Litkowski, S., and R. Shakir, "Segment
Routing Architecture", RFC 8402, DOI 10.17487/RFC8402, Routing Architecture", RFC 8402, DOI 10.17487/RFC8402,
July 2018, <https://www.rfc-editor.org/info/rfc8402>. July 2018, <https://www.rfc-editor.org/info/rfc8402>.
[RFC8476] Tantsura, J., Chunduri, U., Aldrin, S., and P. Psenak, [RFC8476] Tantsura, J., Chunduri, U., Aldrin, S., and P. Psenak,
"Signaling Maximum SID Depth (MSD) Using OSPF", RFC 8476, "Signaling Maximum SID Depth (MSD) Using OSPF", RFC 8476,
DOI 10.17487/RFC8476, December 2018, DOI 10.17487/RFC8476, December 2018, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc8476>. editor.org/info/rfc8476>.
[RFC8491] Tantsura, J., Chunduri, U., Aldrin, S., and L. Ginsberg, [RFC8491] Tantsura, J., Chunduri, U., Aldrin, S., and L. Ginsberg,
"Signaling Maximum SID Depth (MSD) Using IS-IS", RFC 8491, "Signaling Maximum SID Depth (MSD) Using IS-IS", RFC 8491,
DOI 10.17487/RFC8491, November 2018, DOI 10.17487/RFC8491, November 2018, <https://www.rfc-
<https://www.rfc-editor.org/info/rfc8491>. editor.org/info/rfc8491>.
12.2. Informative References 12.2. Informative References
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>. <https://www.rfc-editor.org/info/rfc8340>.
Authors' Addresses Authors' Addresses
Stephane Litkowski Stephane Litkowski
Orange Business Service Orange Business Service
Email: stephane.litkowski@orange.com Email: stephane.litkowski@orange.com
Yingzhen Qu Yingzhen Qu
Huawei Huawei
Email: yingzhen.qu@huawei.com Email: yingzhen.qu@huawei.com
Acee Lindem
Cisco
301 Mindenhall Way
Cary, NC 27513
US
Email: acee@cisco.com
Pushpasis Sarkar Pushpasis Sarkar
Individual Individual
Email: pushpasis.ietf@gmail.com Email: pushpasis.ietf@gmail.com
Jeff Tantsura Jeff Tantsura
Apstra Apstra
Email: jefftant.ietf@gmail.com Email: jefftant.ietf@gmail.com
Acee Lindem
Cisco
301 Mindenhall Way
Cary, NC 27513
US
Email: acee@cisco.com
 End of changes. 62 change blocks. 
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