module ietf-segment-routing-common {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-segment-routing-common";
prefix sr-cmn;
import ietf-inet-types {
prefix inet;
reference
"RFC 6991: Common YANG Data Types";
}
organization
"IETF SPRING - SPRING Working Group";
contact
"WG Web:
WG List:
Author: Stephane Litkowski
Author: Yingzhen Qu
Author: Acee Lindem
Author: Pushpasis Sarkar
Author: Jeff Tantsura
";
description
"This YANG module defines a collection of generic types and
groupings for Segment Routing (SR), as described in RFC 8402.
This YANG module conforms to the Network Management
Datastore Architecture (NMDA), as described in RFC 8242.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.
Copyright (c) 2021 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC 9020;
see the RFC itself for full legal notices.";
reference
"RFC 9020: YANG Data Model for Segment Routing";
revision 2021-05-26 {
description
"Initial version";
reference
"RFC 9020: YANG Data Model for Segment Routing";
}
feature sid-last-hop-behavior {
description
"Configurable last-hop behavior.";
reference
"RFC 8660: Segment Routing with the MPLS Data Plane";
}
identity prefix-sid-algorithm {
description
"Base identity for prefix-sid algorithm.";
reference
"RFC 8402: Segment Routing Architecture";
}
identity prefix-sid-algorithm-shortest-path {
base prefix-sid-algorithm;
description
"Shortest Path First (SPF) Prefix-SID algorithm. This
is the default algorithm.";
}
identity prefix-sid-algorithm-strict-spf {
base prefix-sid-algorithm;
description
"This algorithm mandates that the packet is forwarded
according to the ECMP-aware SPF algorithm.";
}
grouping srlr {
description
"Grouping for SR Label Range configuration.";
leaf lower-bound {
type uint32;
description
"Lower value in the label range.";
}
leaf upper-bound {
type uint32;
must '../lower-bound < ../upper-bound' {
error-message
"The upper-bound must be greater than the lower-bound.";
description
"The value must be greater than lower-bound.";
}
description
"Upper value in the label range.";
}
}
grouping srgb {
description
"Grouping for SR Global Label Range.";
list srgb {
key "lower-bound upper-bound";
ordered-by user;
description
"List of global blocks to be advertised.";
uses srlr;
}
}
grouping srlb {
description
"Grouping for SR Local Block Range.";
list srlb {
key "lower-bound upper-bound";
ordered-by user;
description
"List of SRLBs.";
uses srlr;
}
}
grouping sid-value-type {
description
"Defines how the SID value is expressed.";
leaf value-type {
type enumeration {
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 the value must be interpreted.";
}
}
grouping prefix-sid {
description
"This grouping defines configuration of a Prefix-SID.";
leaf prefix {
type inet:ip-prefix;
description
"Connected Prefix-SID.";
}
uses prefix-sid-attributes;
}
grouping ipv4-sid {
description
"Grouping for an IPv4 Prefix-SID.";
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;
}
grouping last-hop-behavior {
description
"Defines last-hop behavior.";
leaf last-hop-behavior {
if-feature "sid-last-hop-behavior";
type enumeration {
enum explicit-null {
description
"Use explicit-null for the SID.";
}
enum no-php {
description
"Do not use MPLS Penultimate Hop Popping (PHP)
for the SID.";
}
enum php {
description
"Use MPLS PHP for the SID.";
}
}
description
"Configure last-hop behavior.";
}
}
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 sid-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.";
}
}
}