draft-ietf-lsr-ospf-yang-augmentation-v1-04.txt   draft-ietf-lsr-ospf-yang-augmentation-v1-05.txt 
Internet A. Lindem Internet A. Lindem
Internet-Draft Cisco Systems Internet-Draft Cisco Systems
Intended status: Standards Track Y. Qu Intended status: Standards Track Y. Qu
Expires: October 31, 2021 Futurewei Expires: December 23, 2021 Futurewei
April 29, 2021 June 21, 2021
OSPF YANG Model Augmentations for Additional Features - Version 1 OSPF YANG Model Augmentations for Additional Features - Version 1
draft-ietf-lsr-ospf-yang-augmentation-v1-04 draft-ietf-lsr-ospf-yang-augmentation-v1-05
Abstract Abstract
This document defines YANG data modules augmenting the IETF OSPF YANG This document defines YANG data modules augmenting the IETF OSPF YANG
model to provide support for Traffic Engineering Extensions to OSPF model to provide support for Traffic Engineering Extensions to OSPF
Version 3 as defined in RF 5329, OSPF Two-Part Metric as defined in Version 3 as defined in RF 5329, OSPF Two-Part Metric as defined in
RFC 8042, OSPF Graceful Link Shutdown as defined in RFC 8379 and OSPF RFC 8042, OSPF Graceful Link Shutdown as defined in RFC 8379, OSPF
Link-Local Signaling (LLS) Extensions for Local Interface ID Link-Local Signaling (LLS) Extensions for Local Interface ID
Advertisement as defined in RFC 8510. Advertisement as defined in RFC 8510 and OSPF Flexible Algorithm.
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
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This Internet-Draft will expire on October 31, 2021. This Internet-Draft will expire on December 23, 2021.
Copyright Notice Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the Copyright (c) 2021 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 (https://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
skipping to change at page 2, line 18 skipping to change at page 2, line 18
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. YANG Module for Traffic Engineering Extesions to OSPF Version 2. YANG Module for Traffic Engineering Extesions to OSPF Version
3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. YANG Module for OSPF Two-Part Metric . . . . . . . . . . . . 8 3. YANG Module for OSPF Two-Part Metric . . . . . . . . . . . . 8
4. YANG Module for OSPF Graceful Link Shutdown . . . . . . . . . 13 4. YANG Module for OSPF Graceful Link Shutdown . . . . . . . . . 13
5. YANG Module for OSPF LLS Extenstion for Local Interface ID 5. YANG Module for OSPF LLS Extenstion for Local Interface ID
Advertisement . . . . . . . . . . . . . . . . . . . . . . . . 18 Advertisement . . . . . . . . . . . . . . . . . . . . . . . . 18
6. YANG Module for OSPF Application-Specific Link Attributes . . 20 6. YANG Module for OSPF Application-Specific Link Attributes . . 20
7. Security Considerations . . . . . . . . . . . . . . . . . . . 26 7. YANG Module for OSPF Flexible Algorithm . . . . . . . . . . . 26
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 8. Security Considerations . . . . . . . . . . . . . . . . . . . 46
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 27 9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 47
10. Normative References . . . . . . . . . . . . . . . . . . . . 27 10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 48
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 29 11. Normative References . . . . . . . . . . . . . . . . . . . . 48
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 50
1. Overview 1. Overview
YANG [RFC6020] [RFC7950] is a data definition language used to define YANG [RFC6020] [RFC7950] is a data definition language used to define
the contents of a conceptual data store that allows networked devices the contents of a conceptual data store that allows networked devices
to be managed using NETCONF [RFC6241]. YANG is proving relevant to be managed using NETCONF [RFC6241]. YANG is proving relevant
beyond its initial confines, as bindings to other interfaces (e.g., beyond its initial confines, as bindings to other interfaces (e.g.,
ReST) and encodings other than XML (e.g., JSON) are being defined. ReST) and encodings other than XML (e.g., JSON) are being defined.
Furthermore, YANG data models can be used as the basis for Furthermore, YANG data models can be used as the basis for
implementation of other interfaces, such as CLI and programmatic implementation of other interfaces, such as CLI and programmatic
skipping to change at page 2, line 47 skipping to change at page 2, line 48
provide support for configuration and operational state for the provide support for configuration and operational state for the
following OSPF features: following OSPF features:
RFC5329: Traffic Engineering Extensions to OSPF Version 3 [RFC5329]. RFC5329: Traffic Engineering Extensions to OSPF Version 3 [RFC5329].
RFC8042: OSPF Two-Part Metric [RFC8042]. RFC8042: OSPF Two-Part Metric [RFC8042].
RFC8379: OSPF Graceful Link Shutdown [RFC8379]. RFC8379: OSPF Graceful Link Shutdown [RFC8379].
RFC8510: OSPF Link-Local Signaling (LLS) Extensions for Local RFC8510: OSPF Link-Local Signaling (LLS) Extensions for Local
Interface ID Advertisement[RFC8510]. Interface ID Advertisement [RFC8510].
RFC8920: OSPF Application-Specific Link Attributes [RFC8920].
RFCxxxx: IGP Flexible Algorithm [I-D.ietf-lsr-flex-algo].
The augmentations defined in this document requires support for the The augmentations defined in this document requires support for the
OSPF base model[I-D.ietf-ospf-yang] which defines basic OSPF OSPF base model[I-D.ietf-ospf-yang] which defines basic OSPF
configuration and state. The OSPF YANG model augments the ietf- configuration and state. The OSPF YANG model augments the ietf-
routing YANG model defined in [RFC8022]. routing YANG model defined in [RFC8022].
1.1. Requirements Language 1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
2. YANG Module for Traffic Engineering Extesions to OSPF Version 3 2. YANG Module for Traffic Engineering Extesions to OSPF Version 3
This document defines a YANG module for Traffic Engineering This document defines a YANG module for Traffic Engineering
Extersions to OSPF Version 3 as defined in [RFC5329]. It is an Extensions to OSPF Version 3 as defined in [RFC5329]. It is an
augmentation of the OSPF base model. augmentation of the OSPF base model.
module: ietf-ospfv3-te module: ietf-ospfv3-te
augment /rt:routing/rt:control-plane-protocols augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area /rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area
/ospf:database/ospf:area-scope-lsa-type/ospf:area-scope-lsas /ospf:database/ospf:area-scope-lsa-type/ospf:area-scope-lsas
/ospf:area-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3 /ospf:area-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3
/ospf:body: /ospf:body:
+--ro ospfv3-intra-area-te +--ro ospfv3-intra-area-te
+--ro router-address-tlv +--ro router-address-tlv
skipping to change at page 26, line 5 skipping to change at page 26, line 5
E-Router LSAs"; E-Router LSAs";
} }
description description
"Augment OSPFv3 Area scope router-link TLV."; "Augment OSPFv3 Area scope router-link TLV.";
uses application-specific-link-attributes-sub-tlvs; uses application-specific-link-attributes-sub-tlvs;
} }
} }
<CODE ENDS> <CODE ENDS>
7. Security Considerations 7. YANG Module for OSPF Flexible Algorithm
This document defines a YANG module for OSPF Flexible Algorithm as
defined in [I-D.ietf-lsr-flex-algo]. It is an augmentation of the
OSPF base model.
module: ietf-ospf-flex-algo
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf:
+--rw ospf-flex-algo
+--rw flex-algo* [algo-number]
+--rw algo-number uint8
+--rw advertise-definition? boolean
+--rw admin-groups {te-types:extended-admin-groups,
te-types:named-extended-admin-groups}?
| +--rw exclude-admin-groups* -> /te:te/globals
/named-admin-groups
/named-admin-group/name
| +--rw include-any-admin-groups* -> /te:te/globals
/named-admin-groups
/named-admin-group/name
| +--rw include-all-admin-groups* -> /te:te/globals
/named-admin-groups
/named-admin-group/name
+--rw exclude-srlgs* -> /te:te/globals/named-srlgs
/named-srlg/name
{te-types:named-srlg-groups}?
+--rw fast-reroute? boolean
+--rw metric-type? identityref
+--rw microloop-avoidance? boolean
+--rw prefix-metric!
+--rw priority? uint8
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area
/ospf:interfaces/ospf:interface/ospf:database
/ospf:link-scope-lsa-type/ospf:link-scope-lsas
/ospf:link-scope-lsa/ospf:version/ospf:ospfv2/ospf:ospfv2
/ospf:body/ospf:opaque/ospf:ri-opaque:
+--ro fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
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:ospfv2/ospf:ospfv2
/ospf:body/ospf:opaque/ospf:ri-opaque:
+--ro fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
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:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
/ospf:ri-opaque:
+--ro fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area
/ospf:interfaces/ospf:interface/ospf:database
/ospf:link-scope-lsa-type/ospf:link-scope-lsas
/ospf:link-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3
/ospf:body/ospf:router-information:
+--ro fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
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/ospf:router-information:
+--ro fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
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 fad-tlvs
+--ro fad-tlv* []
+--ro flex-algo? uint8
+--ro metric-type? identityref
+--ro calc-type? uint8
+--ro priority? uint8
+--ro fa-ex-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-any-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fa-in-all-ag-sub-tlv
| +--ro extended-admin-groups* uint64
+--ro fad-flags-sub-tlv
| +--ro fad-flags* identityref
+--ro fa-ex-srlg-sub-tlv
| +--ro srlgs* uint32
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area
/ospf:interfaces/ospf:interface/ospf:database
/ospf:link-scope-lsa-type/ospf:link-scope-lsas
/ospf:link-scope-lsa/ospf:version/ospf:ospfv2/ospf:ospfv2
/ospf:body/ospf:opaque/ospf:extended-prefix-opaque
/ospf:extended-prefix-tlv:
+--ro fapm-sub-tlvs
+--ro fapm-sub-tlv* []
+--ro flex-algo? uint8
+--ro fapm-flags* identityref
+--ro metric? uint32
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:ospfv2/ospf:ospfv2
/ospf:body/ospf:opaque/ospf:extended-prefix-opaque
/ospf:extended-prefix-tlv:
+--ro fapm-sub-tlvs
+--ro fapm-sub-tlv* []
+--ro flex-algo? uint8
+--ro fapm-flags* identityref
+--ro metric? uint32
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:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
/ospf:extended-prefix-opaque/ospf:extended-prefix-tlv:
+--ro fapm-sub-tlvs
+--ro fapm-sub-tlv* []
+--ro flex-algo? uint8
+--ro fapm-flags* identityref
+--ro metric? uint32
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-inter-area-prefix
/ospfv3-e-lsa:e-inter-prefix-tlvs
/ospfv3-e-lsa:inter-prefix-tlv:
+--ro fapm-sub-tlvs
+--ro fapm-sub-tlv* []
+--ro flex-algo? uint8
+--ro fapm-flags* identityref
+--ro metric? uint32
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
/ospfv3-e-lsa:e-as-external/ospfv3-e-lsa:e-external-tlvs
/ospfv3-e-lsa:external-prefix-tlv:
+--ro fapm-sub-tlvs
+--ro fapm-sub-tlv* []
+--ro flex-algo? uint8
+--ro fapm-flags* identityref
+--ro metric? uint32
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:ospfv2/ospf:ospfv2
/ospf:body/ospf:opaque:
+--ro eia-asbr-opaque
+--ro eia-asbr-tlv
| +--ro asbr-rtr-id? rt-types:router-id
| +--ro faam-sub-tlvs
| | +--ro faam-sub-tlv* []
| | +--ro flex-algo? uint8
| | +--ro metric? uint32
| +--ro unknown-tlvs
| +--ro unknown-tlv* []
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro unknown-tlvs
+--ro unknown-tlv* []
+--ro type? uint16
+--ro length? uint16
+--ro value? yang:hex-string
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-inter-area-router
/ospfv3-e-lsa:e-inter-router-tlvs
/ospfv3-e-lsa:inter-router-tlv:
+--ro faam-sub-tlvs
+--ro faam-sub-tlv* []
+--ro flex-algo? uint8
+--ro metric? uint32
<CODE BEGINS> file "ietf-ospf-flex-algo@2021-06-18.yang"
module ietf-ospf-flex-algo {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-ospf-flex-algo";
prefix ospf-flex-algo;
import ietf-routing {
prefix rt;
reference "RFC 8349: A YANG Data Model for Routing
Management (NMDA Version)";
}
import ietf-routing-types {
prefix "rt-types";
reference "RFC 8294: Common YANG Data Types for the
Routing Area";
}
import ietf-te-types {
prefix te-types;
reference
"RFC8776: Common YANG Data Types for Traffic Engineering.";
}
import ietf-ospf {
prefix "ospf";
}
import ietf-ospfv3-extended-lsa {
prefix "ospfv3-e-lsa";
}
import ietf-te {
prefix "te";
}
organization
"IETF LSR - Link State Routing Working Group";
contact
"WG Web: <https://tools.ietf.org/wg/spring/>
WG List: <mailto:spring@ietf.org>
Author: Yingzhen Qu
<mailto:yingzhen.qu@futurewei.com>
Author: Acee Lindem
<mailto:acee@cisco.com>
Author: Stephane Litkowski
<mailto:slitkows.ietf@gmail.com>
";
description
"The YANG module defines the configuration and operational
state for OSPF Flexible Algorithm as defined in RFC xxxx.
This YANG model conforms to the Network Management
Datastore Architecture (NMDA) as described in RFC 8342.
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 XXXX;
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.";
reference "RFC XXXX: YANG Data Model for OSPF Flexible Algorithm.";
revision 2021-06-18 {
description
"Initial Version";
reference "RFC XXXX: YANG Data Model for OSPF Flexible Algorithm.";
}
/* Identities */
identity metric-type {
description
"Base identity for route metric types.";
}
identity igp-metric {
base metric-type;
description
"Identity for the IGP metric type.";
}
identity min-uni-delay {
base metric-type;
description
"Min unidirectional link delay metric type.";
reference
"RFC 7471 - OSPF Traffic Engineering (TE) Metric Extensions";
}
identity te-metric {
base metric-type;
description
"Traffic engineering metric type.";
reference
"RFC 3630 - Traffic Engineering (TE) Extensions to OSPF
Version 2";
}
identity fad-flags {
description
"Base identity for OSPF FAD flags.";
}
identity m-bit {
base fad-flags;
description
"M bit, when set, the fex-algo specific prefix and ASBR
metric MUST be used for inter-area and external prefix
calculation.";
}
identity fapm-flags {
description
"Base identity for OSPF flex-algo prefix metric flags.";
}
identity e-bit {
base fapm-flags;
description
"External metric, if set, the metric specified is a
type 2 external metric.";
}
/* Groupings */
grouping fa-ex-ag-sub-tlv {
container fa-ex-ag-sub-tlv {
leaf-list extended-admin-groups {
type uint64;
description
"Extended administrative group as defined in RFC 7308.";
}
description
"The flex-algo exclude admin group sub-tlv.";
}
description
"The flex-algo exclude admin group sub-tlv.";
}
grouping fa-in-any-ag-sub-tlv {
container fa-in-any-ag-sub-tlv {
leaf-list extended-admin-groups {
type uint64;
description
"Extended administrative group as defined in RFC 7308.";
}
description
"The flex-algo include-any admin group sub-tlv.";
}
description
"The flex-algo include-any admin group sub-tlv.";
}
grouping fa-in-all-ag-sub-tlv {
container fa-in-all-ag-sub-tlv {
leaf-list extended-admin-groups {
type uint64;
description
"Extended administrative group as defined in RFC 7308.";
}
description
"The flex-algo include-all admin group sub-tlv.";
}
description
"The flex-algo include-all admin group sub-tlv.";
}
grouping fad-flags-sub-tlv {
container fad-flags-sub-tlv {
leaf-list fad-flags {
type identityref {
base fad-flags;
}
description
"Flex-algo definition flags list.";
}
description
"OSPF flex-algo definition flags.";
}
description
"The flex-algo definition flags sub-tlv.";
}
grouping fa-ex-srlg-sub-tlv {
container fa-ex-srlg-sub-tlv {
leaf-list srlgs {
type uint32;
description
"SRLG value as defined in RFC 4203.";
}
description
"The flex-algo exclude SRLG sub-tlv.";
}
description
"The flex-algo exclude SRLG sub-tlv.";
}
grouping fad-tlvs {
container fad-tlvs {
list fad-tlv {
leaf flex-algo {
type uint8;
description
"Flex-algo number, value between 128 and 255 inclusive.";
}
leaf metric-type {
type identityref {
base metric-type;
}
description
"Type of metric to be used during the calculation.";
}
leaf calc-type {
type uint8 {
range "0..127";
}
description
"IGP algorithm types, value from 0 to 127 as
defined under 'Interior Gateway Protocol (IGP)
Parameter' by IANA.";
}
leaf priority {
type uint8;
description
"Priority of the advertisement.";
}
uses fa-ex-ag-sub-tlv;
uses fa-in-any-ag-sub-tlv;
uses fa-in-all-ag-sub-tlv;
uses fad-flags-sub-tlv;
uses fa-ex-srlg-sub-tlv;
uses ospf:unknown-tlvs;
description
"List of flex-algo definition TLVs.";
}
description
"OSPF Flexible Algorithm Definition TLV.";
}
description
"OSPF Flexible Algorithm Definition (FAD) TLV.";
}
grouping fapm-sub-tlvs {
container fapm-sub-tlvs {
list fapm-sub-tlv {
leaf flex-algo {
type uint8;
description
"Flex-algo number, value between 128 and 255
inclusive.";
}
leaf-list fapm-flags {
type identityref {
base fapm-flags;
}
description
"Flex-algo prefix metric flags list.";
}
leaf metric {
type uint32;
description
"Prefix metric.";
}
description
"List of flex-algo prefix sub-tlvs.";
}
description
"Flex-algo prefix metric sub-tlvs.";
}
description
"Flexible Algorithm Prefix Metric (FAPM) sub TLVs.";
}
grouping faam-sub-tlvs {
container faam-sub-tlvs {
list faam-sub-tlv {
leaf flex-algo {
type uint8;
description
"Flex-algo number, value between 128 and 255
inclusive.";
}
leaf metric {
type uint32;
description
"Prefix metric.";
}
description
"List of faam sub-tlvs.";
}
description
"Flexible Algorithm ASBR Metric (FAAM) Sub-TLVs.";
}
description
"Flexible Algorithm ASBR Metric (FAAM) Sub-TLVs.";
}
/* Configurations */
augment "/rt:routing/rt:control-plane-protocols"
+ "/rt:control-plane-protocol/ospf:ospf" {
when "../rt:type = 'ospf:ospfv2' or "
+ "../rt:type = 'ospf:ospfv3'" {
description
"This augments the OSPF routing protocol when used.";
}
description
"This augments OSPF protocol with Flexible
Algorithm.";
container ospf-flex-algo {
list flex-algo {
key "algo-number";
leaf algo-number {
type uint8 {
range "128..255";
}
description
"An identifier in the range 128-255 that's associated
with the Flexible Algorithm Definition.";
}
leaf advertise-definition {
type boolean;
default true;
description
"Enable to advertise the flex-algo definition.";
}
container admin-groups {
if-feature "te-types:extended-admin-groups";
if-feature "te-types:named-extended-admin-groups";
leaf-list exclude-admin-groups {
type leafref {
path "/te:te/te:globals/te:named-admin-groups/"
+ "te:named-admin-group/te:name";
}
description
"Exclude rule used during the flex-algo
path computation.";
}
leaf-list include-any-admin-groups {
type leafref {
path "/te:te/te:globals/te:named-admin-groups/"
+ "te:named-admin-group/te:name";
}
description
"Include-any rule used during the flex-algo
path computation.";
}
leaf-list include-all-admin-groups {
type leafref {
path "/te:te/te:globals/te:named-admin-groups/"
+ "te:named-admin-group/te:name";
}
description
"Include-all rule used during the flex-algo
path computation.";
}
description
"Specify links for the flex-algo path computation.";
}
leaf-list exclude-srlgs {
if-feature "te-types:named-srlg-groups";
type leafref {
path "/te:te/te:globals/te:named-srlgs/te:named-srlg/"
+ "te:name";
}
description
"Shared Risk Link Groups (SRLGs) to be excluded during
the flex-algo path computation.";
}
leaf fast-reroute {
type boolean;
default true;
description
"Enable fast reroute.";
}
leaf metric-type {
type identityref {
base metric-type;
}
description
"Type of metric to be used during the calculation.";
}
leaf microloop-avoidance {
type boolean;
default true;
description
"Enable microloop avoidance.";
}
container prefix-metric {
presence
"Use flex-algo specific prefix metric.";
description
"Use flex-algo prefix metric.";
}
leaf priority {
type uint8;
description
"Priority of the advertisement.";
}
description
"List of flex-algo configurations.";
}
description
"Flexible Algorithm configuration.";
}
}
/* Database */
augment "/rt:routing/"
+ "rt:control-plane-protocols/rt:control-plane-protocol/"
+ "ospf:ospf/ospf:areas/ospf:area/"
+ "ospf:interfaces/ospf:interface/ospf:database/"
+ "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
+ "ospf:link-scope-lsa/ospf:version/ospf:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
when "../../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo definition TLVs for OSPFv2 type 9 opaque RI LSA.";
uses fad-tlvs;
}
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:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
when "../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo definition TLVs for OSPFv2 type 10 opaque RI LSA.";
uses fad-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:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
when "../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo definition TLVs for OSPFv2 type 11 opaque RI LSA.";
uses fad-tlvs;
}
augment "/rt:routing/"
+ "rt:control-plane-protocols/rt:control-plane-protocol/"
+ "ospf:ospf/ospf:areas/ospf:area/"
+ "ospf:interfaces/ospf:interface/ospf:database/"
+ "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
+ "ospf:link-scope-lsa/ospf:version/ospf:ospfv3/"
+ "ospf:ospfv3/ospf:body/ospf:router-information" {
when "../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
description
"Flex-algo definition TLVs for OSPFv3 Router Information LSA.";
uses fad-tlvs;
}
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/ospf:router-information" {
when "../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
description
"Flex-algo definition TLVs for OSPFv3 Router Information LSA.";
uses fad-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:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
description
"Flex-algo definition TLVs for OSPFv3 Router Information LSA.";
uses fad-tlvs;
}
augment "/rt:routing/"
+ "rt:control-plane-protocols/rt:control-plane-protocol/"
+ "ospf:ospf/ospf:areas/ospf:area/"
+ "ospf:interfaces/ospf:interface/ospf:database/"
+ "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
+ "ospf:link-scope-lsa/ospf:version/ospf:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/"
+ "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
when "../../../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo prefix metric sub TLVs for OSPFv2 extended prefix TLV
in type 9 opaque LSA.";
uses fapm-sub-tlvs;
}
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:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/"
+ "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
when "../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo prefix metric sub TLVs for OSPFv2 extended prefix TLV
in type 10 opaque LSA.";
uses fapm-sub-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:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque/"
+ "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
when "../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"Flex-algo prefix metric sub TLVs for OSPFv2 extended prefix TLV
in type 11 opaque LSA.";
uses fapm-sub-tlvs;
}
/* Flex-algo prefix metric Sub-TLV in OSPFv3 Inter-Area Prefix TLV */
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-inter-area-prefix/"
+ "ospfv3-e-lsa:e-inter-prefix-tlvs/ospfv3-e-lsa:inter-prefix-tlv" {
when "../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3
E-Router LSAs";
}
uses fapm-sub-tlvs;
description
"OSPFv3 Area-Scoped Inter-Area Prefix TLV.";
}
/* Flex-algo prefix metric Sub-TLV in OSPFv3 External Prefix TLV */
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/ospfv3-e-lsa:e-as-external/"
+ "ospfv3-e-lsa:e-external-tlvs/ospfv3-e-lsa:external-prefix-tlv" {
when "'ospf:../../../../../../../../../"
+ "rt:type' = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
uses fapm-sub-tlvs;
description
"OSPFv3 AS-Scoped External Prefix TLV.";
}
/* OSPFv2 Extended Inter-Area ASBR LSA */
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:ospfv2/"
+ "ospf:ospfv2/ospf:body/ospf:opaque" {
when "../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv2'" {
description
"This augmentation is only valid for OSPFv2.";
}
description
"OSPFv2 Extended Inter-Area ASBR LSA in type 10
opaque LSA.";
container eia-asbr-opaque {
container eia-asbr-tlv {
leaf asbr-rtr-id {
type rt-types:router-id;
description
"The OSPF Router ID of the ASBR.";
}
uses faam-sub-tlvs;
uses ospf:unknown-tlvs;
description
"EIA-ASBR TLV, used to advertise additional attributes
associated with the reachability of an ASBR.";
}
uses ospf:unknown-tlvs;
description
"OSPFv2 Extended Inter-Area (EIA-ASBR) opaque LSA.";
}
}
/* FAAM Sub-TLV in OSPFv3 Inter-Area-Router TLV */
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-inter-area-router/"
+ "ospfv3-e-lsa:e-inter-router-tlvs/"
+ "ospfv3-e-lsa:inter-router-tlv" {
when "../../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3
Inter-Area-Router TLV.";
}
uses faam-sub-tlvs;
description
"OSPFv3 Area-Scoped Inter-Area-Router TLV.";
}
}
<CODE ENDS>
8. Security Considerations
The YANG modules specified in this document define a schema for data The YANG modules specified in this document define a schema for data
that is designed to be accessed via network management protocols such that is designed to be accessed via network management protocols such
as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer
is the secure transport layer, and the mandatory-to-implement secure is the secure transport layer, and the mandatory-to-implement secure
transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer
is HTTPS, and the mandatory-to-implement secure transport is TLS is HTTPS, and the mandatory-to-implement secure transport is TLS
[RFC5246]. [RFC5246].
The NETCONF access control model [RFC6536] provides the means to The NETCONF access control model [RFC6536] provides the means to
skipping to change at page 26, line 36 skipping to change at page 47, line 9
Some of the readable data nodes in the modules may be considered Some of the readable data nodes in the modules may be considered
sensitive or vulnerable in some network environments. It is thus sensitive or vulnerable in some network environments. It is thus
important to control read access (e.g., via get, get-config, or important to control read access (e.g., via get, get-config, or
notification) to these data nodes. The exposure of the Link State notification) to these data nodes. The exposure of the Link State
Database (LSDB) will expose the detailed topology of the network. Database (LSDB) will expose the detailed topology of the network.
This may be undesirable since both due to the fact that exposure may This may be undesirable since both due to the fact that exposure may
facilitate other attacks. Additionally, network operators may facilitate other attacks. Additionally, network operators may
consider their topologies to be sensitive confidential data. consider their topologies to be sensitive confidential data.
8. IANA Considerations 9. IANA Considerations
This document registers URIs in the IETF XML registry [RFC3688]. This document registers URIs in the IETF XML registry [RFC3688].
Following the format in [RFC3688], the following registrations is Following the format in [RFC3688], the following registrations is
requested to be made: requested to be made:
URI: urn:ietf:params:xml:ns:yang:ietf-ospfv3-te URI: urn:ietf:params:xml:ns:yang:ietf-ospfv3-te
Registrant Contact: The IESG. Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace. XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-ospf-two-metric URI: urn:ietf:params:xml:ns:yang:ietf-ospf-two-metric
skipping to change at page 27, line 13 skipping to change at page 47, line 35
XML: N/A, the requested URI is an XML namespace. XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-ospf-lls-localid URI: urn:ietf:params:xml:ns:yang:ietf-ospf-lls-localid
Registrant Contact: The IESG. Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace. XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-ospf-link-attr URI: urn:ietf:params:xml:ns:yang:ietf-ospf-link-attr
Registrant Contact: The IESG. Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace. XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-ospf-flex-algo
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
This document registers the YANG modules in the YANG Module Names This document registers the YANG modules in the YANG Module Names
registry [RFC6020]. registry [RFC6020].
name: ietf-ospfv3-te name: ietf-ospfv3-te
namespace: urn:ietf:params:xml:ns:yang:ietf-ospfv3-te namespace: urn:ietf:params:xml:ns:yang:ietf-ospfv3-te
prefix: ospfv3-te prefix: ospfv3-te
reference: RFC XXXX reference: RFC XXXX
name: ietf-ospf-two-metric name: ietf-ospf-two-metric
namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-two-metric namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-two-metric
skipping to change at page 27, line 41 skipping to change at page 48, line 19
name: ietf-ospf-lls-localid name: ietf-ospf-lls-localid
namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-lls-localid namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-lls-localid
prefix: ospf-lls-localid prefix: ospf-lls-localid
reference: RFC XXXX reference: RFC XXXX
name: ietf-ospf-link-attr name: ietf-ospf-link-attr
namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-link-attr namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-link-attr
prefix: ospf-link-attr prefix: ospf-link-attr
reference: RFC XXXX reference: RFC XXXX
9. Acknowledgements name: ietf-ospf-flex-algo
namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-flex-algo
prefix: ospf-flex-algo
reference: RFC XXXX
10. Acknowledgements
This document was produced using Marshall Rose's xml2rfc tool. This document was produced using Marshall Rose's xml2rfc tool.
The YANG model was developed using the suite of YANG tools written The YANG model was developed using the suite of YANG tools written
and maintained by numerous authors. and maintained by numerous authors.
10. Normative References 11. Normative References
[I-D.ietf-lsr-flex-algo]
Psenak, P., Hegde, S., Filsfils, C., Talaulikar, K., and
A. Gulko, "IGP Flexible Algorithm", draft-ietf-lsr-flex-
algo-15 (work in progress), April 2021.
[I-D.ietf-ospf-yang] [I-D.ietf-ospf-yang]
Yeung, D., Qu, Y., Zhang, Z., Chen, I., and A. Lindem, Yeung, D., Qu, Y., Zhang, J., Chen, I., and A. Lindem,
"YANG Data Model for OSPF Protocol", draft-ietf-ospf- "YANG Data Model for OSPF Protocol", draft-ietf-ospf-
yang-29 (work in progress), October 2019. yang-29 (work in progress), October 2019.
[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-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004, DOI 10.17487/RFC3688, January 2004,
 End of changes. 14 change blocks. 
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