YANG Data Model for OSPF SRv6
draft-ietf-lsr-ospf-srv6-yang-01
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Active".
|
|
|---|---|---|---|
| Authors | Zhibo Hu, Xuesong Geng , Syed Kamran Raza , Yingzhen Qu , Acee Lindem | ||
| Last updated | 2022-08-08 (Latest revision 2022-03-26) | ||
| Replaces | draft-hu-lsr-ospf-srv6-yang | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Formats | |||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Document shepherd | Christian Hopps | ||
| IESG | IESG state | I-D Exists | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | chopps@chopps.org |
draft-ietf-lsr-ospf-srv6-yang-01
Network Working Group Z. Hu
Internet-Draft X. Geng
Intended status: Standards Track Huawei Technologies
Expires: 27 September 2022 K. Raza
Cisco Systems, Inc.
Y. Qu
Futurewei Technologies
A. Lindem
Cisco Systems
26 March 2022
YANG Data Model for OSPF SRv6
draft-ietf-lsr-ospf-srv6-yang-01
Abstract
This document defines a YANG data model that can be used to configure
and manage OSPFv3 SRv6 as defined in I-D.ietf-lsr-
ospfv3-srv6-extensions.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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 27 September 2022.
Copyright Notice
Copyright (c) 2022 IETF Trust and the persons identified as the
document authors. All rights reserved.
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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 Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology and Notation . . . . . . . . . . . . . . . . . . 3
2.1. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 4
2.2. Prefixes in Data Node Names . . . . . . . . . . . . . . . 4
3. OSPFv3 SRv6 Configuration . . . . . . . . . . . . . . . . . . 4
3.1. SRv6 Activation . . . . . . . . . . . . . . . . . . . . . 5
3.2. Locator Setting . . . . . . . . . . . . . . . . . . . . . 5
3.3. IP Fast Reroute . . . . . . . . . . . . . . . . . . . . . 5
3.4. Micro-loop Avoidance . . . . . . . . . . . . . . . . . . 5
4. YANG Module and Tree . . . . . . . . . . . . . . . . . . . . 5
4.1. OSPFv3 SRv6 Model Tree . . . . . . . . . . . . . . . . . 5
4.2. OSPFv3 SRv6 YANG Module . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 21
6. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 22
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 22
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 22
9. Normative References . . . . . . . . . . . . . . . . . . . . 23
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 24
1. Introduction
YANG [RFC7950] is a data definition language used to define the
contents of a conceptual data store that allows networked devices to
be managed using NETCONF[RFC6241]. YANG is proving relevant beyond
its initial confines, as bindings to other interfaces (e.g., ReST)
and encodings other than XML (e.g., JSON) are being defined.
Furthermore, YANG data models can be used as the basis for
implementation of other interfaces, such as CLI and programmatic
APIs.
This document defines a YANG data model that can be used to configure
and manage OSPFv3 SRv6 and it is an augmentation to the OSPF YANG
data model.
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2. Terminology and Notation
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
The following terms are defined in [RFC8342]:
* client
* server
* configuration
* system state
* operational state
* intended configuration
The following terms are defined in [RFC7950]:
* action
* augment
* container
* container with presence
* data model
* data node
* feature
* leaf
* list
* mandatory node
* module
* schema tree
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* RPC (Remote Procedure Call) operation
2.1. Tree Diagrams
Tree diagrams used in this document follow the notation defined in
[RFC8340].
2.2. Prefixes in Data Node Names
In this document, names of data nodes, actions, and other data model
objects are often used without a prefix, as long as it is clear from
the context in which YANG module each name is defined. Otherwise,
names are prefixed using the standard prefix associated with the
corresponding YANG module, as shown in Table 1.
+------------+-----------------------------+-----------------------+
| Prefix |YANG Module | Reference |
+------------+-----------------------------+-----------------------+
|ospfv3-e-lsa| ietf-ospfv3-extended-lsa | I-D.ietf-lsr-ospfv3 |
| | | -extended-lsa-yang |
| | | |
| ospf | ietf-ospf | I-D.ietf-ospf-yang |
| | | |
| srv6 | ietf-srv6-base | I-D.ietf-spring-srv6 |
| | | -yang |
| | | |
| sr | ietf-segment-routing | [RFC9020] |
| | | |
| rt | ietf-routing | [RFC8349] |
| | | |
| yang | ietf-yang-types | [RFC6991] |
| | | |
| inet | ietf-inet-types | [RFC6991] |
+------------+-----------------------------+-----------------------+
Figure 1: Table 1: Prefixes and Corresponding YANG Modules
3. OSPFv3 SRv6 Configuration
This document defines a model for OSPFv3 SRv6 feature. It is an
augmentation of the OSPF base model.
The OSPFv3 SRv6 YANG module requires support of OSPF base model
[I-D.ietf-ospf-yang] which defines basic OSPF configuration and state
and support of OSPFv3 Extended LSAs model
[I-D.ietf-lsr-ospfv3-extended-lsa-yang].
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3.1. SRv6 Activation
Activation of OSPFv3 SRv6 is done by setting the "enable" leaf to
true. This triggers advertisement of SRv6 extensions based on the
configuration parameters that have been setup using the base SRv6
module [I-D.ietf-spring-srv6-yang].
3.2. Locator Setting
The SRv6 base module [I-D.ietf-spring-srv6-yang] defines locators.
When OSPFv6 SRv6 is enabled, the specified locators are used unless
it is enabled to use the default locator. The default locator can be
set by using two leafs, i.e.,"default-locator" leaf, "locator-name"
leaf.
3.3. IP Fast Reroute
Additional data object (in the OSPFv3 SRv6 model ) for fast reroute
[RFC5286] is introduced by augmenting the fast-reroute container of
the OSPF module. It brings the ability to activate ipv6 TI-LFA
(topology independent LFA) [I-D.ietf-rtgwg-segment-routing-ti-lfa].
3.4. Micro-loop Avoidance
OSPFv3 SRv6 model augments OSPF module with the micro-loop-avoidance
container, this container including the leaf "srv6-enable" brings the
ability to activate SRv6 avoid-microloop.
4. YANG Module and Tree
4.1. OSPFv3 SRv6 Model Tree
The figure below describes the overall structure of the ospfv3-srv6
YANG module:
module: ietf-ospfv3-srv6
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf:
+--rw srv6
| +--rw enable? boolean
| +--rw default-locator? boolean
| +--rw locator-name* -> /rt:routing/srv6:srv6
| /srv6:locators/srv6:locator/srv6:name
| +--rw persistent-end-x-sid? boolean
+--rw micro-loop-avoidance
+--rw srv6-enable? boolean
+--rw srv6-rib-update-delay? uint16
augment /rt:routing/rt:control-plane-protocols
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/rt:control-plane-protocol/ospf:ospf
/ospf:fast-reroute:
+--rw srv6-ti-lfa {srv6-ti-lfa}?
+--rw enable? boolean
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf
/ospf:database/ospf:as-scope-lsa-type
/ospf:as-scope-lsas/ospf:as-scope-lsa
/ospf:version/ospf:ospfv3
/ospf:ospfv3/ospf:body:
+--ro srv6-locator
+--ro srv6-locactor-tlv
+--ro route-type? identityref
+--ro algorithm? uint8
+--ro locator-length? uint8
+--ro flags? bits
+--ro metric? uint32
+--ro locator* inet:ipv6-address-no-zone
+--ro srv6-end-sid
+--ro flags? uint8
+--ro endpoint-func
| +--ro fuc-flags? uint8
| +--ro endpoint-func? identityref
| +--ro undefined-endpoint-func? uint16
+--ro sid? srv6-sid-value
+--ro srv6-sid-structure
+--ro lb-length? uint8
+--ro ln-length? uint8
+--ro fun-length? uint8
+--ro arg-length? uint8
augment /rt:routing
/rt:control-plane-protocols/rt:control-plane-protocol
/ospf:ospf/ospf:database
/ospf:as-scope-lsa-type/ospf:as-scope-lsas
/ospf:as-scope-lsa/ospf:version/ospf:ospfv3
/ospf:ospfv3/ospf:body/ospf:router-information:
+--ro srv6-capability
| +--ro flags? bits
+--ro srv6-msd
+--ro max-segments-left? uint8
+--ro max-end-pop? uint8
+--ro max-h-encaps? uint8
+--ro max-end-d? uint8
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area
/ospf:database/ospf:area-scope-lsa-type/ospf:area-scope-lsas
/ospf:area-scope-lsa/ospf:version/ospf:ospfv3
/ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-router
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/ospfv3-e-lsa:e-router-tlvs
/ospfv3-e-lsa:link-tlv:
+--ro srv6-endx-sid
+--ro endpoint-func
| +--ro fuc-flags? uint8
| +--ro endpoint-func? identityref
| +--ro undefined-endpoint-func? uint16
+--ro flags? bits
+--ro algorithm? uint8
+--ro weight? uint8
+--ro sid* srv6-sid-value
+--ro neighbor-router-id? yang:dotted-quad
+--ro srv6-sid-structure
+--ro lb-length? uint8
+--ro ln-length? uint8
+--ro fun-length? uint8
+--ro arg-length? uint8
4.2. OSPFv3 SRv6 YANG Module
<CODE BEGINS> file "ietf-ospfv3-srv6@2022-03-26.yang"
module ietf-ospfv3-srv6 {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:"
+ "yang:ietf-ospfv3-srv6";
prefix ospfv3-srv6;
import ietf-yang-types {
prefix "yang";
reference "RFC 6991: Common YANG Data Types";
}
import ietf-routing {
prefix "rt";
reference "RFC 8349: A YANG Data Model for Routing
Management (NMDA Version)";
}
import ietf-ospfv3-extended-lsa {
prefix "ospfv3-e-lsa";
}
import ietf-ospf {
prefix "ospf";
}
import ietf-srv6-base {
prefix "srv6";
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}
import ietf-inet-types {
prefix "inet";
}
import ietf-segment-routing {
prefix "sr";
}
organization
"IETF LSR Working Group";
contact
"WG Web: <https://datatracker.ietf.org/group/lsr/>
WG List: <mailto:lsr@ietf.org>
Author: Zhibo Hu
<mailto:huzhibo@huawei.com>
Author: Xuesong Geng
<mailto:gengxuesong@huawei.com>
Author: Kamran Raza
<mailto:skraza@cisco.com>
Author: Yingzhen Qu
<mailto:yingzhen.qu@futurewei.com>
Author: Acee Lindem
<mailto:acee@cisco.com>
";
description
"The YANG module defines the configuration and operatioanl state
for OSPFv3 extensions to support Segment Routing over IPv6 data
plane.
This YANG model conforms to the Network Management
Datastore Architecture (NDMA) as described in RFC 8342.
Copyright (c) 2022 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
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(https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself
for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2022-03-26 {
description
"Initial revision.";
reference "draft-ietf-lsr-ospfv3-srv6-extensions";
}
/* Identities */
identity SRV6_END_FUNC_TYPE {
description
"Base identity type for srv6 endpoint function code points.";
}
identity SRV6_END_FUNC_NO_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
"End (no PSP, no USP).";
}
identity SRV6_END_FUNC_PSP {
base "SRV6_END_FUNC_TYPE";
description
"End with PSP.";
}
identity SRV6_END_FUNC_USP {
base "SRV6_END_FUNC_TYPE";
description
"END with USP.";
}
identity SRV6_END_FUNC_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
"END with PSP & USP.";
}
identity SRV6_END_T_FUNC_NO_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
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"End.T (no PSP, no USP).";
}
identity SRV6_END_T_FUNC_PSP {
base "SRV6_END_FUNC_TYPE";
description
"End.T with PSP.";
}
identity SRV6_END_T_FUNC_USP {
base "SRV6_END_FUNC_TYPE";
description
"End.T with USP.";
}
identity SRV6_END_T_FUNC_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
"End.T with PSP & USP.";
}
identity SRV6_END_X_FUNC_NO_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
"End.x (no PSP, no USP).";
}
identity SRV6_END_X_FUNC_PSP {
base "SRV6_END_FUNC_TYPE";
description
"End.x with PSP.";
}
identity SRV6_END_X_FUNC_USP {
base "SRV6_END_FUNC_TYPE";
description
"End.x with USP.";
}
identity SRV6_END_X_FUNC_PSP_USP {
base "SRV6_END_FUNC_TYPE";
description
"End.x with PSP & USP.";
}
identity SRV6_END_FUNC_DX6 {
base "SRV6_END_FUNC_TYPE";
description
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"End.DX6 function.";
}
identity SRV6_END_FUNC_DT6 {
base "SRV6_END_FUNC_TYPE";
description
"End.DT6 function.";
}
identity SRV6_END_FUNC_OTP {
base "SRV6_END_FUNC_TYPE";
description
"END.OTP.";
}
identity s1-bit {
base ospf:ospfv3-lsa-option;
description
"the S1/S2 bits are dependent on the desired
flooding scope for the LSA.";
}
identity s2-bit {
base ospf:ospfv3-lsa-option;
description
"the S1/S2 bits are dependent on the desired
flooding scope for the LSA.";
}
identity srv6-locator-lsa {
base ospf:ospfv3-lsa-type;
description
"SRv6 Locator LSA - Type TBD";
}
identity LOCATOR-ROUTE-TYPE {
description
"The type of the locator route.";
}
identity INTRA-AREA-LOCATOR {
base "LOCATOR-ROUTE-TYPE";
description
"Intra-Area";
}
identity INTER-AREA-LOCATOR {
base "LOCATOR-ROUTE-TYPE";
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description
"Inter-Area";
}
identity AS-EXTERNAL-LOCATOR {
base "LOCATOR-ROUTE-TYPE";
description
"AS External";
}
identity NSSA-EXTERNAL-LOCATOR {
base "LOCATOR-ROUTE-TYPE";
description
"NSSA External";
}
/* typedef */
typedef srv6-sid-value {
type inet:ipv6-address-no-zone;
description
"16 Octets encoded sid value.";
}
/* Features */
feature srv6-ti-lfa {
description
"Enhance SRv6 FRR with ti-lfa
support";
}
/* Groupings */
grouping srv6-msds {
description
"Used to advertise node/link specific
values for Maximum Sid Depths(MSD) of various types";
container srv6-msd {
description
"Maximum SRv6 SID Depths.";
leaf max-segments-left {
type uint8;
description
"The Maximum Segments Left MSD Type specifies
the maximum value of the 'SL' field in the SRH
of a received packet before applying the Endpoint
behavior associated with a SID.";
}
leaf max-end-pop {
type uint8;
description
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"The Maximum End Pop MSD Type specifies the maximum
number of SIDs in the SRH to which the router can
apply 'PSP' or 'USP' behavior, as defined in flavors.";
}
leaf max-h-encaps {
type uint8;
description
"The Maximum H.Encaps MSD Type specifies the maximum number
of SIDs that can be included as part of the 'H.Encaps'
behavior";
}
leaf max-end-d {
type uint8;
description
"The maximum number of SIDs in an SRH when performing
decapsulation associated with 'End.Dx' functions
(e.g., 'End.DX6' and 'End.DT6').";
}
}
}
grouping srv6-capabilities {
description
"SRV6 capability grouping.";
container srv6-capability {
description
"SRv6 capability.";
leaf flags {
type bits {
bit o-flag {
position 1;
description
"If set, then router is capable of supporting SRH O-bit
";
}
}
description
"Flags.";
reference
"I-D.ali-spring-srv6-oam: OAM in SRv6";
}
}
}
grouping srv6-endpoint-func {
description
"This group defines srv6 endpoint function";
container endpoint-func {
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description
"Srv6 Endpoint function Descriptor.";
leaf fuc-flags {
type uint8;
description
"No function flags are currently being defined.";
}
leaf endpoint-func {
type identityref {
base SRV6_END_FUNC_TYPE;
}
description
"The endpoint function.";
}
leaf undefined-endpoint-func {
type uint16;
description
"Unknown endpoint func value.";
}
}
}
grouping srv6-end-sids {
description
"This group defines srv6 end sid";
container srv6-end-sid {
description
"SRv6 Segment Identifier(SID) with Endpoint functions.";
leaf flags {
type uint8;
description
"NO flags are currently being defined.";
}
uses srv6-endpoint-func;
leaf sid {
type srv6-sid-value;
description
"SRV6 sid value.";
}
uses srv6-sid-structures;
}
}
grouping srv6-sid-structures {
description
"This group defines SRv6 SID Structure sub-TLV.";
container srv6-sid-structure {
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description
"SRv6 SID Structure sub-TLV is used to advertise the length
of each individual part of the SRv6 SID as defined in
[I-D.ietf-spring-srv6-network-programming]";
leaf lb-length {
type uint8;
description
"SRv6 SID Locator Block length in bits.";
}
leaf ln-length {
type uint8;
description
"SRv6 SID Locator Node length in bits.";
}
leaf fun-length {
type uint8;
description
"SRv6 SID Function length in bits.";
}
leaf arg-length {
type uint8;
description
"SRv6 SID Argument length in bits.";
}
}
}
grouping srv6-endx-sids {
description
"This group defines SRv6 SIDs Associated with Adjacencies
including SRv6 End.X SID Sub-TLV and SRv6 LAN End.X SID
Sub-TLV.";
container srv6-endx-sid {
description
"SRv6 sids associated with an adjacency.";
uses srv6-endpoint-func;
leaf flags {
type bits {
bit b-flag {
position 0;
description
"Backup Flag. If set, the SID refers to a path that is
eligible for protection";
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}
bit s-flag {
position 1;
description
"Set Flag. When set, the S-Flag indicates that the
End.X SID refers to a set of adjacencies (and therefore
MAY be assigned to other adjacencies as well).";
}
bit p-flag {
position 2;
description
"Persistent Flag: If set, the SID is persistently
allocated, i.e., the SID value remains consistent
across router restart and session/interface flap.";
}
}
description
"Flags for end.x subtlv.";
}
leaf algorithm {
type uint8;
description
"Associated algorithm.";
}
leaf weight {
type uint8;
description
"8 bit field whose value represents the weight of the End.X
SID for the purpose of load balancing";
}
leaf-list sid {
type srv6-sid-value;
description
"SRV6 sid value.";
}
leaf neighbor-router-id {
type yang:dotted-quad;
description
"Neighbor router ID.This is only
used on LAN adjacencies.";
}
uses srv6-sid-structures;
}
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}
grouping srv6-locactor-tlvs {
description
"This group defines srv6 locator tlv.";
container srv6-locactor-tlv {
description
"This contains a srv6 locator tlv.";
leaf route-type {
type identityref {
base LOCATOR-ROUTE-TYPE;
}
description
"The type of the locator route";
}
leaf algorithm {
type uint8;
description
"Associated algorithm.";
}
leaf locator-length {
type uint8;
description
"Carries the length of the Locator
prefix as number of bits (1-128)";
}
leaf flags {
type bits {
bit n-flag {
position 0;
description
"When the locator uniquely identifies a node in the
network (i.e. it is provisioned on one and only one
node), the N bit MUST be set. Otherwise, this bit
MUST be clear";
}
bit a-flag {
position 1;
description
"When the Locator is configured as anycast, the A bit
SHOULD be set. Otherwise, this bit MUST be clear";
}
}
description
"Flags for srv6 locator tlv.";
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}
leaf metric {
type uint32;
description
"Metric value.";
}
leaf-list locator {
type inet:ipv6-address-no-zone;
description
"Advertised SRV6 locator.";
}
uses srv6-end-sids;
}
}
/* Cfg */
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/ospf:ospf" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'ospf:ospfv3'" {
description
"This augment OSPFv3 routing protocol when used";
}
description
"This augments OSPFv3 protocol configuration
with SRv6.";
container srv6{
leaf enable{
type boolean;
default "false";
description
"Enables SRv6 protocol extensions.";
}
leaf default-locator {
type boolean;
default "false";
description
"Enable OSPFv3 segment-routing IPv6 with default Locator.";
}
leaf-list locator-name {
when "not(../default-locator='true')" {
description
"Only applies to non default locator.";
}
type leafref {
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path "/rt:routing/sr:segment-routing/srv6:srv6"
+ "/srv6:locators/srv6:locator/srv6:name";
}
description
"Enable OSPFv3 segment-routing IPv6 with specified Locator.";
}
leaf persistent-end-x-sid{
type boolean;
default "false";
description
"Enable the persistent nature of End.X sid";
}
description
"Configuration about OSPFv3 segment-routing IPv6.";
}
container micro-loop-avoidance {
leaf srv6-enable {
type boolean;
default "false";
description
"Enable SRv6 avoid-microloop.Depend on SR IPv6 Enable.";
}
leaf srv6-rib-update-delay {
type uint16 {
range "1000..10000";
}
units "ms";
default "5000";
description
"Set the route delivery delay for SRv6 avoid-microloop.
Depend on SR IPv6 Enable.";
}
description
"Enable OSPFv3 avoid-microloop.";
}
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/ospf:ospf/ospf:fast-reroute"{
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'ospf:ospfv3'"{
description
"This augment OSPFv3 routing protocol when used";
}
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description
"This augments OSPFv3 IP FRR with IPV6 TILFA.";
container srv6-ti-lfa {
if-feature srv6-ti-lfa;
leaf enable {
type boolean;
description
"Enables SRv6 TI-LFA computation.";
}
description
"SRv6 TILFA configuration.";
}
}
/* Database */
augment "/rt:routing/"
+ "rt:control-plane-protocols/rt:control-plane-protocol/"
+ "ospf:ospf/ospf:database/"
+ "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
+ "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/"
+ "ospf:ospfv3/ospf:body" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'ospf:ospfv3'" {
description
"This augment OSPFv3 routing protocol when used";
}
description
"This augments OSPFv3 protocol router capability.";
container srv6-locator {
description
"SRv6 Locator LSA.";
uses srv6-locactor-tlvs;
}
}
augment "/rt:routing/"
+ "rt:control-plane-protocols/rt:control-plane-protocol/"
+ "ospf:ospf/ospf:database/"
+ "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
+ "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/"
+ "ospf:ospfv3/ospf:body/ospf:router-information" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'ospf:ospfv3'" {
description
"This augment OSPFv3 routing protocol when used";
}
description
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"This augments OSPFv3 protocol router capability.";
uses srv6-capabilities;
uses srv6-msds;
}
augment "/rt:routing/rt:control-plane-protocols"
+ "/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area"
+ "/ospf:database/ospf:area-scope-lsa-type"
+ "/ospf:area-scope-lsas"
+ "/ospf:area-scope-lsa/ospf:version/ospf:ospfv3"
+ "/ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-router/"
+ "ospfv3-e-lsa:e-router-tlvs/"
+ "ospfv3-e-lsa:link-tlv" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'ospf:ospfv3'" {
}
description
"This augments OSPFv3 protocol neighbor.";
uses srv6-endx-sids;
}
/* Notifications */
}
<CODE ENDS>
5. Security Considerations
The YANG modules specified in this document define a schema for data
that is designed to be accessed via network management protocols,
such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF
layer is the secure transport layer, and the mandatory-to-implement
secure transport is Secure Shell (SSH) [RFC6242]. The lowest
RESTCONF layer is HTTPS, and the mandatory-to-implement secure
transport is TLS [RFC8446].
The Network Configuration Access Control Model (NACM) [RFC8341]
provides the means to restrict access for particular NETCONF or
RESTCONF users to a preconfigured subset of all available NETCONF or
RESTCONF protocol operations and content.
There are a number of data nodes defined in the modules that are
writable/creatable/deletable (i.e., config true, which is the
default). These data nodes may be considered sensitive or vulnerable
in some network environments. Write operations (e.g., edit-config)
to these data nodes without proper protection can have a negative
effect on network operations. These are the subtrees and data nodes
and their sensitivity/vulnerability:
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* srv6
* micro-loop-avoidance
* srv6-ti-lfa
There are a number of data nodes defined in the modules that are
writable/creatable/deletable (i.e., config true, which is the
default). These data nodes may be considered sensitive or vulnerable
in some network environments. Write operations (e.g., edit-config)
to these data nodes without proper protection can have a negative
effect on network operations. These are the subtrees and data nodes
and their sensitivity/vulnerability:
* srv6-locator
* srv6-capability
* srv6-msd
* srv6-endx-sid
6. Contributors
Qin Wu
Huawei
Email: bill.wu@huawei.com
7. Acknowledgements
TBD.
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-ospfv3-srv6
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace
This document also requests one new YANG module name in the YANG
Module Names registry ([RFC6020]) with the following suggestion :
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name: ietf-ospfv3-srv6
namespace: urn:ietf:params:xml:ns:yang:ietf-ospfv3-srv6
prefix: ospfv3-srv6
reference: RFC XXXX
9. Normative References
[I-D.ietf-lsr-ospfv3-extended-lsa-yang]
Lindem, A., Palani, S., and Y. Qu, "YANG Model for OSPFv3
Extended LSAs", Work in Progress, Internet-Draft, draft-
ietf-lsr-ospfv3-extended-lsa-yang-10, 6 March 2022,
<https://www.ietf.org/archive/id/draft-ietf-lsr-ospfv3-
extended-lsa-yang-10.txt>.
[I-D.ietf-lsr-ospfv3-srv6-extensions]
Li, Z., Hu, Z., Cheng, D., Talaulikar, K., and P. Psenak,
"OSPFv3 Extensions for SRv6", Work in Progress, Internet-
Draft, draft-ietf-lsr-ospfv3-srv6-extensions-03, 19
November 2021, <https://www.ietf.org/archive/id/draft-
ietf-lsr-ospfv3-srv6-extensions-03.txt>.
[I-D.ietf-ospf-yang]
Yeung, D., Qu, Y., Zhang, J., Chen, I., and A. Lindem,
"YANG Data Model for OSPF Protocol", Work in Progress,
Internet-Draft, draft-ietf-ospf-yang-29, 17 October 2019,
<https://www.ietf.org/archive/id/draft-ietf-ospf-yang-
29.txt>.
[I-D.ietf-rtgwg-segment-routing-ti-lfa]
Litkowski, S., Bashandy, A., Filsfils, C., Francois, P.,
Decraene, B., and D. Voyer, "Topology Independent Fast
Reroute using Segment Routing", Work in Progress,
Internet-Draft, draft-ietf-rtgwg-segment-routing-ti-lfa-
08, 21 January 2022, <https://www.ietf.org/archive/id/
draft-ietf-rtgwg-segment-routing-ti-lfa-08.txt>.
[I-D.ietf-spring-srv6-yang]
Raza, K., Agarwal, S., Liu, X., Hu, Z., Hussain, I., Shah,
H., Voyer, D., Matsushima, S., Horiba, K., Rajamanickam,
J., and A. AbdelSalam, "YANG Data Model for SRv6 Base and
Static", Work in Progress, Internet-Draft, draft-ietf-
spring-srv6-yang-01, 14 January 2022,
<https://www.ietf.org/archive/id/draft-ietf-spring-srv6-
yang-01.txt>.
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[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.
[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,
<https://www.rfc-editor.org/info/rfc6241>.
[RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration
Protocol (NETCONF) Access Control Model", RFC 6536,
DOI 10.17487/RFC6536, March 2012,
<https://www.rfc-editor.org/info/rfc6536>.
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.
[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>.
[RFC9020] Litkowski, S., Qu, Y., Lindem, A., Sarkar, P., and J.
Tantsura, "YANG Data Model for Segment Routing", RFC 9020,
DOI 10.17487/RFC9020, May 2021,
<https://www.rfc-editor.org/info/rfc9020>.
Authors' Addresses
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Zhibo Hu
Huawei Technologies
Huawei Bld., No.156 Beiqing Rd.
Beijing
100095
China
Email: huzhibo@huawei.com
Xuesong Geng
Huawei Technologies
Huawei Bld., No.156 Beiqing Rd.
Beijing
100095
China
Email: gengxuesong@huawei.com
Kamran Raza
Cisco Systems, Inc.
2000 Innovation Drive Kanata, ON K2K-3E8 CA
Email: skraza@cisco.com
Yingzhen Qu
Futurewei Technologies
2330 Central Express Way
Santa Clara, 950950
United States of America
Email: yingzhen.qu@futurewei.com
Acee Lindem
Cisco Systems
301 Midenhall Way
Cary, NC, 27513
United States of America
Email: acee@cisco.com
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