YANG Model for OSPFv3 Extended LSAs
draft-ietf-lsr-ospfv3-extended-lsa-yang-10
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 | Acee Lindem , Sharmila Palani , Yingzhen Qu | ||
| Last updated | 2022-03-06 (Latest revision 2021-09-27) | ||
| Replaces | draft-acee-lsr-ospfv3-extended-lsa-yang | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Formats | |||
| Reviews |
YANGDOCTORS Last Call review
(of
-14)
by Mahesh Jethanandani
On the Right Track
|
||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Document shepherd | Christian Hopps | ||
| IESG | IESG state | I-D Exists | |
| Consensus boilerplate | Yes | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | Christian Hopps <chopps@chopps.org> |
draft-ietf-lsr-ospfv3-extended-lsa-yang-10
Internet A. Lindem
Internet-Draft Cisco Systems
Intended status: Standards Track S. Palani
Expires: 7 September 2022 Microsoft
Y. Qu
Futurewei
6 March 2022
YANG Model for OSPFv3 Extended LSAs
draft-ietf-lsr-ospfv3-extended-lsa-yang-10
Abstract
This document defines a YANG data model augmenting the IETF OSPF YANG
model to provide support for OSPFv3 Link State Advertisement (LSA)
Extensibility as defined in RFC 8362. OSPFv3 Extended LSAs provide
extensible TLV-based LSAs for the base LSA types defined in RFC 5340.
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 7 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. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2
2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 3
3. OSPFv3 Extended LSAs . . . . . . . . . . . . . . . . . . . . 3
4. OSPFv3 Extended LSA Yang Module . . . . . . . . . . . . . . . 8
5. Security Considerations . . . . . . . . . . . . . . . . . . . 25
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 26
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1. Normative References . . . . . . . . . . . . . . . . . . 27
8.2. Informative References . . . . . . . . . . . . . . . . . 28
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 28
1. Overview
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 augmenting the IETF OSPF YANG
model [I-D.ietf-ospf-yang], which itself augments [RFC8349], to
provide support for configuration and operational state for OSPFv3
Extended LSAs as defined in [RFC8362].
The YANG modules in this document conform to the Network Management
Datastore Architecture (NMDA) [RFC8342].
1.1. 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 [RFC2119] [RFC8174].
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2. Tree Diagrams
This document uses the graphical representation of data models
defined in [RFC8340].
3. OSPFv3 Extended LSAs
This document defines a model for the OSPFv3 Extended LSA feature.
It is an augmentation of the OSPF base model provided support for
OSPFv3 Link State Advertisement (LSA) Extensibility [RFC8362].
OSPFv3 Extended LSAs provide extensible TLV-based LSAs for the base
LSA types defined in [RFC5340].
The OSPFv3 Extended LSA YANG module requires support for the OSPF
base model[I-D.ietf-ospf-yang] which defines basic OSPF configuration
and state. The OSPF YANG model augments the ietf-routing YANG model
defined in [RFC8022]. The augmentations defined in the ietf-ospfv3-
extended-lsa YANG model will provide global configuration, area
configuration, and addition of OSPFv3 Extended LSAs to the Link State
Database (LSDB) operational state.
module: ietf-ospfv3-extended-lsa
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf:
+--rw extended-lsa-support? boolean
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area:
+--rw extended-lsa-support? boolean
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:
+--ro e-link
+--ro rtr-priority? uint8
+--ro lsa-options
| +--ro lsa-options* identityref
+--ro e-link-tlvs* []
+--ro unknown-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro intra-prefix-tlv
| +--ro intra-prefix-tlv-length? uint16
| +--ro metric? rt-types:uint24
| +--ro prefix? inet:ip-prefix
| +--ro prefix-options
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| | +--ro prefix-options* identityref
| +--ro prefix-length? uint8
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro ipv6-link-local-tlv
| +--ro ipv6-link-local-tlv-length? uint16
| +--ro link-local-address? inet:ipv6-address
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro ipv4-link-local-tlv
+--ro ipv4-link-local-tlv-length? uint16
+--ro link-local-address? inet:ipv4-address
+--ro sub-tlvs* []
+--ro unknown-sub-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:
+--ro e-router
| +--ro router-bits
| | +--ro rtr-lsa-bits* identityref
| +--ro lsa-options
| | +--ro lsa-options* identityref
| +--ro e-router-tlvs* []
| +--ro unknown-tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro link-tlv
| +--ro link-tlv-length? uint16
| +--ro interface-id? uint32
| +--ro neighbor-interface-id? uint32
| +--ro neighbor-router-id? rt-types:router-id
| +--ro type? uint8
| +--ro metric? uint16
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
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| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro e-network
| +--ro lsa-options
| | +--ro lsa-options* identityref
| +--ro e-network-tlvs* []
| +--ro unknown--tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro attached-router-tlv
| +--ro attached-router-tlv-length? uint16
| +--ro Adjacent-neighbor-router-id* rt-types:router-id
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro e-inter-area-prefix
| +--ro e-inter-prefix-tlvs* []
| +--ro unknown--tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro inter-prefix-tlv
| +--ro inter-prefix-tlv-length? uint16
| +--ro metric? rt-types:uint24
| +--ro prefix? inet:ip-prefix
| +--ro prefix-options
| | +--ro prefix-options* identityref
| +--ro prefix-length? uint8
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro e-inter-area-router
| +--ro e-inter-router-tlvs* []
| +--ro unknown-tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro inter-router-tlv
| +--ro inter-router-tlv-length? uint16
| +--ro router-bits
| | +--ro rtr-lsa-bits* identityref
| +--ro lsa-options
| | +--ro lsa-options* identityref
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| +--ro metric? rt-types:uint24
| +--ro destination-router-id? rt-types:router-id
| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro e-intra-area-prefix
+--ro referenced-ls-type? uint16
+--ro referenced-link-state-id? uint32
+--ro referenced-adv-router? rt-types:router-id
+--ro e-intra-prefix-tlvs* []
+--ro unknown-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro intra-prefix-tlv
+--ro intra-prefix-tlv-length? uint16
+--ro metric? rt-types:uint24
+--ro prefix? inet:ip-prefix
+--ro prefix-options
| +--ro prefix-options* identityref
+--ro prefix-length? uint8
+--ro sub-tlvs* []
+--ro unknown-sub-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:
+--ro e-as-external
| +--ro e-external-tlvs* []
| +--ro unknown-tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro external-prefix-tlv
| +--ro external-prefix-tlv-length? uint16
| +--ro flags
| | +--ro ospfv3-e-external-prefix-bits* identityref
| +--ro metric? rt-types:uint24
| +--ro prefix? inet:ip-prefix
| +--ro prefix-options
| | +--ro prefix-options* identityref
| +--ro prefix-length? uint8
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| +--ro sub-tlvs* []
| +--ro unknown-sub-tlv
| | +--ro type? uint16
| | +--ro length? uint16
| | +--ro value? yang:hex-string
| +--ro ipv6-fwd-addr-sub-tlv
| | +--ro ipv6-fwd-addr-sub-tlv-length? uint16
| | +--ro forwarding-address? inet:ipv6-address
| +--ro ipv4-fwd-addr-sub-tlv
| | +--ro ipv4-fwd-addr-sub-tlv-length? uint16
| | +--ro forwarding-address? inet:ipv4-address
| +--ro route-tag-sub-tlv
| +--ro route-tag-sub-tlv-length? uint16
| +--ro route-tag? uint32
+--ro e-nssa
+--ro e-external-tlvs* []
+--ro unknown-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro external-prefix-tlv
+--ro external-prefix-tlv-length? uint16
+--ro flags
| +--ro ospfv3-e-external-prefix-bits* identityref
+--ro metric? rt-types:uint24
+--ro prefix? inet:ip-prefix
+--ro prefix-options
| +--ro prefix-options* identityref
+--ro prefix-length? uint8
+--ro sub-tlvs* []
+--ro unknown-sub-tlv
| +--ro type? uint16
| +--ro length? uint16
| +--ro value? yang:hex-string
+--ro ipv6-fwd-addr-sub-tlv
| +--ro ipv6-fwd-addr-sub-tlv-length? uint16
| +--ro forwarding-address? inet:ipv6-address
+--ro ipv4-fwd-addr-sub-tlv
| +--ro ipv4-fwd-addr-sub-tlv-length? uint16
| +--ro forwarding-address? inet:ipv4-address
+--ro route-tag-sub-tlv
+--ro route-tag-sub-tlv-length? uint16
+--ro route-tag? uint32
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4. OSPFv3 Extended LSA Yang Module
The following RFCs and drafts are not referenced in the document text
but are referenced in the ietf-ospfv3-extended-lsa.yang module:
[RFC6991], [RFC8294].
<CODE BEGINS> file "ietf-ospfv3-extended-lsa@2022-03-06.yang"
module ietf-ospfv3-extended-lsa {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-ospfv3-extended-lsa";
prefix ospfv3-e-lsa;
import ietf-routing-types {
prefix "rt-types";
reference "RFC 8294 - Common YANG Data Types for the
Routing Area";
}
import ietf-inet-types {
prefix "inet";
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-ospf {
prefix "ospf";
reference "RFC YYYY - A YANG Data Model for OSPF
Protocol";
}
organization
"IETF LSR - Link State Routing Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/lsr/>
WG List: <mailto:lsr@ietf.org>
Author: Acee Lindem
<mailto:acee@cisco.com>
Author: Sharmila Palani
<mailto:sharmila.palani@microsoft.com>
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Author: Yingzhen Qu
<mailto:yingzhen.qu@futurewei.com>";
description
"This YANG module defines the configuration
and operational state for OSPFv3 Extended LSAs, which is
common across all of the vendor implementations. The
semantics and encodings for OSPFv3 Extended LSAs is
described in RFC 8362.
This YANG model conforms to the Network Management
Datastore Architecture (NMDA) 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;
see the RFC itself for full legal notices.";
reference "RFC XXXX - YANG Model for OSPFv3 Extended LSAs";
revision 2022-03-06 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for OSPFv3 Extended LSAs.";
}
/*
* OSPFv3 Extend LSA Type Identities
*/
identity ospfv3-e-router-lsa {
base ospf:ospfv3-lsa-type;
description
"OSPFv3 Extended Router LSA - Type 0xA021";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.1";
}
identity ospfv3-e-network-lsa {
base ospf:ospfv3-lsa-type;
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description
"OSPFv3 Extended Network LSA - Type 0xA022";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.2";
}
identity ospfv3-e-summary-lsa-type {
base ospf:ospfv3-lsa-type;
description
"OSPFv3 Extended Summary LSA types";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.3 and Section 4.4";
}
identity ospfv3-e-inter-area-prefix-lsa {
base ospfv3-e-summary-lsa-type;
description
"OSPFv3 Extended Inter-area Prefix LSA - Type 0xA023";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.3";
}
identity ospfv3-e-inter-area-router-lsa {
base ospfv3-e-summary-lsa-type;
description
"OSPFv3 Extended Inter-area Router LSA - Type 0xA024";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.3";
}
identity ospfv3-e-external-lsa-type {
base ospf:ospfv3-lsa-type;
description
"OSPFv3 Extended External LSA types";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.5 and Section 4.6";
}
identity ospfv3-e-as-external-lsa {
base ospfv3-e-external-lsa-type;
description
"OSPFv3 Extended AS-External LSA - Type 0xC025";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.5";
}
identity ospfv3-e-nssa-lsa {
base ospfv3-e-external-lsa-type;
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description
"OSPFv3 Extended Not-So-Stubby-Area (NSSA) LSA -
Type 0xA027";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.6";
}
identity ospfv3-e-link-lsa {
base ospf:ospfv3-lsa-type;
description
"OSPFv3 Extended Link LSA - Type 0x8028";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.7";
}
identity ospfv3-e-intra-area-prefix-lsa {
base ospf:ospfv3-lsa-type;
description
"OSPFv3 Extended Intra-area Prefix LSA - Type 0xA029";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.8";
}
identity ospfv3-e-prefix-option {
description
"Base identity for OSPFv3 Prefix Options.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
identity nu-bit {
base ospfv3-e-prefix-option;
description
"When set, the prefix should be excluded
from IPv6 unicast calculations.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
identity la-bit {
base ospfv3-e-prefix-option;
description
"When set, the prefix is actually an IPv6 interface
address of the Advertising Router.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
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identity p-bit {
base ospfv3-e-prefix-option;
description
"When set, the NSSA area prefix should be
translated to an AS External LSA and advertised
by the translating NSSA Border Router.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
identity dn-bit {
base ospfv3-e-prefix-option;
description
"When set, the inter-area-prefix LSA or
AS-external LSA prefix has been advertised as an
L3VPN prefix.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
identity n-bit {
base ospfv3-e-prefix-option;
description
"When set, the prefix is a host address that identifies
the advertising router.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
identity ospfv3-e-external-prefix-option {
description
"Base identity for OSPFv3 External Prefix Options.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.6";
}
identity e-bit {
base ospfv3-e-external-prefix-option;
description
"When set, the metric specified is a Type 2
external metric.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.6";
}
grouping unknown-sub-tlv {
description
"Unknown TLV grouping";
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container unknown-sub-tlv {
uses ospf:tlv;
description "Unknown External TLV Sub-TLV";
}
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 6.3";
}
grouping ospfv3-lsa-prefix {
description
"OSPFv3 LSA prefix";
leaf prefix {
type inet:ip-prefix;
description
"LSA Prefix";
}
container prefix-options {
leaf-list prefix-options {
type identityref {
base ospfv3-e-prefix-option;
}
description
"OSPFv3 prefix option flag list. This list will
contain the identities for the OSPFv3 options
that are set for the OSPFv3 prefix.";
}
description "Prefix options.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.1";
}
leaf prefix-length {
type uint8 {
range "0..128";
}
description "Prefix length.";
}
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3";
}
grouping ipv6-fwd-addr-sub-tlv {
container ipv6-fwd-addr-sub-tlv {
description
"IPv6 Forwarding Address Sub-TLV";
leaf ipv6-fwd-addr-sub-tlv-length {
type uint16;
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description
"IPv6 Forwarding Addrss Sub-TLV Length - 16
for IPv6 address";
}
leaf forwarding-address {
type inet:ipv6-address;
description
"Forwarding address";
}
}
description
"IPv6 Forwarding Address Sub-TLV grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.10";
}
grouping ipv4-fwd-addr-sub-tlv {
container ipv4-fwd-addr-sub-tlv {
description
"IPv4 Forwarding Address Sub-TLV";
leaf ipv4-fwd-addr-sub-tlv-length {
type uint16;
description
"IPv4 Forwarding Addrss Sub-TLV Length - 4
for IPv4 address";
}
leaf forwarding-address {
type inet:ipv4-address;
description
"Forwarding address";
}
}
description
"IPv4 Forwarding Address Sub-TLV grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.11";
}
grouping route-tag-sub-tlv {
container route-tag-sub-tlv {
description
"Route Tag Sub-TLV";
leaf route-tag-sub-tlv-length {
type uint16;
description
"Route Tag Sub-TLV Length - 4 for 32-bit tag";
}
leaf route-tag {
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type uint32;
description
"Route Tag";
}
}
description
"Route Tag Sub-TLV grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.12";
}
grouping external-prefix-tlv {
container external-prefix-tlv {
description "External Prefix LSA TLV";
leaf external-prefix-tlv-length {
type uint16;
description
"External Prefix TLV Length - Variable dependent
on sub-TLVs";
}
container flags {
leaf-list ospfv3-e-external-prefix-bits {
type identityref {
base ospfv3-e-external-prefix-option;
}
description "OSPFv3 external-prefix TLV bits list.";
}
description "External Prefix Flags";
}
leaf metric {
type rt-types:uint24;
description "External Prefix Metric";
}
uses ospfv3-lsa-prefix;
list sub-tlvs {
description "External Prefix TLV Sub-TLVs";
uses unknown-sub-tlv;
uses ipv6-fwd-addr-sub-tlv;
uses ipv4-fwd-addr-sub-tlv;
uses route-tag-sub-tlv;
}
}
description "External Prefix TLV Grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.6";
}
grouping intra-area-prefix-tlv {
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container intra-prefix-tlv {
description "Intra-Area Prefix LSA TLV";
leaf intra-prefix-tlv-length {
type uint16;
description
"Intra-Area Prefix TLV Length - Variable dependent
on sub-TLVs";
}
leaf metric {
type rt-types:uint24;
description "Intra-Area Prefix Metric";
}
uses ospfv3-lsa-prefix;
list sub-tlvs {
description "Intra-Area Prefix TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
description "Intra-Area Prefix TLV Grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.4";
}
grouping ipv6-link-local-tlv {
container ipv6-link-local-tlv {
description "IPv6 Link-Local LSA TLV";
leaf ipv6-link-local-tlv-length {
type uint16;
description
"IPv6 Link-Local TLV Length - Variable dependent
on sub-TLVs";
}
leaf link-local-address {
type inet:ipv6-address;
description
"IPv6 Link Local address";
}
list sub-tlvs {
description "IPv6 Link Local TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
description "IPv6 Link-Local TLV Grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.8";
}
grouping ipv4-link-local-tlv {
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container ipv4-link-local-tlv {
description "IPv4 Link-Local LSA TLV";
leaf ipv4-link-local-tlv-length {
type uint16;
description
"IPv4 Link-Local TLV Length - Variable dependent
on sub-TLVs";
}
leaf link-local-address {
type inet:ipv4-address;
description
"IPv4 Link Local address";
}
list sub-tlvs {
description "IPv4 Link Local TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
description "IPv4 Link-Local TLV Grouping";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 3.9";
}
grouping ospfv3-e-lsa-area {
description "Area scope OSPFv3 Extended LSAs.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4";
container e-router {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-router-lsa'" {
description "Only valid for OSPFv3 Extended-Router LSAs";
}
description "OSPv3 Extended Router LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.1";
uses ospf:ospf-router-lsa-bits;
uses ospf:ospfv3-lsa-options;
list e-router-tlvs {
description "E-Router LSA TLVs";
container unknown-tlv {
uses ospf:tlv;
description "Unknown E-Router TLV";
}
container link-tlv {
description "E-Router LSA TLV";
leaf link-tlv-length {
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type uint16;
description
"Link TLV Length - Variable dependent on sub-TLVs";
}
leaf interface-id {
type uint32;
description "Interface ID for link";
}
leaf neighbor-interface-id {
type uint32;
description "Neighbor's Interface ID for link";
}
leaf neighbor-router-id {
type rt-types:router-id;
description "Neighbor's Router ID for link";
}
leaf type {
type ospf:router-link-type;
description "Link type: 1 - Point-to-Point Link
2 - Transit Network Link
3 - Stub Network Link Link
4 - Virtual Link";
}
leaf metric {
type uint16;
description "Link Metric";
}
list sub-tlvs {
description "Link TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
}
}
container e-network {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-network-lsa'" {
description
"Only applies to E-Network LSAs.";
}
description "Extended Network LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.2";
uses ospf:ospfv3-lsa-options;
list e-network-tlvs {
description "E-Network LSA TLVs";
container unknown--tlv {
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uses ospf:tlv;
description "Unknown E-Network TLV";
}
container attached-router-tlv {
description "Attached Router TLV";
leaf attached-router-tlv-length {
type uint16;
description
"Attached Router TLV Length - Variable dependent
on sub-TLVs";
}
leaf-list Adjacent-neighbor-router-id {
type rt-types:router-id;
description "Adjacent Neighbor's Router ID";
}
list sub-tlvs {
description "Attached Router TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
}
}
container e-inter-area-prefix {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-inter-area-prefix-lsa'" {
description
"Only applies to E-Inter-Area-Prefix LSAs.";
}
description "Extended Inter-Area Prefix LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.3";
list e-inter-prefix-tlvs {
description "E-Inter-Area-Prefix LSA TLVs";
container unknown--tlv {
uses ospf:tlv;
description "Unknown E-Inter-Area-Prefix TLV";
}
container inter-prefix-tlv {
description "Unknown E-Inter-Area-Prefix LSA TLV";
leaf inter-prefix-tlv-length {
type uint16;
description
"Inter-Area-Prefix TLV Length - Variable dependent
on sub-TLVs";
}
leaf metric {
type rt-types:uint24;
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description "Inter-Area Prefix Metric";
}
uses ospfv3-lsa-prefix;
list sub-tlvs {
description "Inter-Area Prefix TLV Sub-TLVs";
uses unknown-sub-tlv;
}
}
}
}
container e-inter-area-router {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-inter-area-router-lsa'" {
description
"Only applies to E-Inter-Area-Router LSAs.";
}
description "Extended Inter-Area Router LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.4";
list e-inter-router-tlvs {
description "E-Inter-Area-Router LSA TLVs";
container unknown-tlv {
uses ospf:tlv;
description "Unknown E-Inter-Area-Router TLV";
}
container inter-router-tlv {
description "Unknown E-Inter-Area-Router LSA TLV";
leaf inter-router-tlv-length {
type uint16;
description
"Inter-Area-Router TLV Length - Variable dependent
on sub-TLVs";
}
uses ospf:ospf-router-lsa-bits;
uses ospf:ospfv3-lsa-options;
leaf metric {
type rt-types:uint24;
description "Inter-Area Router Metric";
}
leaf destination-router-id {
type rt-types:router-id;
description "Destination Router ID";
}
list sub-tlvs {
description "Inter-Area Router TLV Sub-TLVs";
uses unknown-sub-tlv;
}
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}
}
}
container e-intra-area-prefix {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-intra-area-prefix-lsa'" {
description
"Only applies to E-Intra-Area-Prefix LSAs.";
}
description "E-Intra-Area-Prefix LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.8";
leaf referenced-ls-type {
type uint16;
description "Referenced Link State type";
}
leaf referenced-link-state-id {
type uint32;
description
"Referenced Link State ID";
}
leaf referenced-adv-router {
type rt-types:router-id;
description
"Referenced Advertising Router";
}
list e-intra-prefix-tlvs {
description "E-Intra-Area-Prefix LSA TLVs";
container unknown-tlv {
uses ospf:tlv;
description "Unknown E-Intra-Area-Prefix TLV";
}
uses intra-area-prefix-tlv;
}
}
}
grouping ospfv3-e-lsa-as {
description "AS scope OSPFv3 Extended LSAs.";
container e-as-external {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-as-external-lsa'" {
description
"Only applies to E-AS-external LSAs.";
}
list e-external-tlvs {
description "E-External LSA TLVs";
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container unknown-tlv {
uses ospf:tlv;
description "Unknown E-External TLV";
}
uses external-prefix-tlv;
}
description "E-AS-External LSA.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.5";
}
container e-nssa {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-nssa-lsa'" {
description
"Only applies to E-NSSA LSAs.";
}
list e-external-tlvs {
description "E-NSSA LSA TLVs";
container unknown-tlv {
uses ospf:tlv;
description "Unknown E-External TLV";
}
uses external-prefix-tlv;
}
description "E-NSSA LSA.";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.6";
}
}
grouping ospfv3-e-lsa-link {
description "Link scope OSPFv3 Extended LSAs.";
container e-link {
when "../../ospf:header/ospf:type = "
+ "'ospfv3-e-lsa:ospfv3-e-link-lsa'" {
description
"Only applies to Extended Link LSAs.";
}
description "E-Link LSA";
reference "RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Section 4.7";
leaf rtr-priority {
type uint8;
description "Router Priority for the interface.";
}
uses ospf:ospfv3-lsa-options;
list e-link-tlvs {
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description "E-Link LSA TLVs";
container unknown-tlv {
uses ospf:tlv;
description "Unknown E-Link TLV";
}
uses intra-area-prefix-tlv;
uses ipv6-link-local-tlv;
uses ipv4-link-local-tlv;
}
}
}
/* Configuration */
augment "/rt:routing/rt:control-plane-protocols"
+ "/rt:control-plane-protocol/ospf:ospf" {
when "../rt:type = 'ospf:ospfv3'" {
description
"This augments the OSPFv3 routing protocol when used.";
}
description
"This augments the OSPFv3 protocol configuration
with extended LSA support.";
leaf extended-lsa-support {
type boolean;
default false;
description
"Enable OSPFv3 Extended LSA Support for the OSPFv3
domain";
reference
"RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Appendix B - ExtendedLSASupport";
}
}
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/ospf:ospf/ospf:areas/ospf:area" {
when "../../../rt:type = 'ospf:ospfv3'" {
description
"This augments the OSPFv3 area configuration
when used.";
}
description
"This augments the OSPFv3 protocol area
configuration with extended LSA support.";
leaf extended-lsa-support {
type boolean;
must "derived-from(../ospf:area-type,'stub-nssa-area') or "
+ "(current() = 'true') or "
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+ "(../../../extended-lsa-support = 'false')" {
description
"For regular areas, i.e., areas where AS-scoped LSAs
disabling AreaExtendedLSASupport for a regular
OSPFv3 area (not a Stub or NSSA area) when
ExtendedLSASupport is enabled is contradictory and
is prohibited.";
}
description
"Enable OSPFv3 Extended LSA Support for the OSPFv3
area. If not specified, Extended LSA support status
is inherited from the instance level configuration.";
reference
"RFC 8362 - OSPFv3 Link State Advertisement (LSA)
Extensibility, Appendix B - AreaExtendedLSASupport";
}
}
/*
* Link State Database (LSDB) Augmentations
*/
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" {
when "../../../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
description
"OSPFv3 Link-Scoped Extended LSAs";
uses ospfv3-e-lsa-link;
}
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" {
when "../../../../../../../../../"
+ "rt:type = 'ospf:ospfv3'" {
description
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"This augmentation is only valid for OSPFv3.";
}
description
"OSPFv3 Area-Scoped Extended LSAs";
uses ospfv3-e-lsa-area;
}
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:type = 'ospf:ospfv3'" {
description
"This augmentation is only valid for OSPFv3.";
}
description
"OSPFv3 AS-Scoped Extended LSAs";
uses ospfv3-e-lsa-as;
}
}
<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 NETCONF access control model [RFC6536] provides the means to
restrict access for particular NETCONF or RESTCONF users to a pre-
configured subset of all available NETCONF or RESTCONF protocol
operations and content.
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There are a number of data nodes defined in ietf-ospfv3-extended-
lsa.yang module 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. There
are the subtrees and data nodes and their sensitivity/vlunerability:
/ospf:ospf/extended-lsa-support
/ospf:ospf/ospf:areas/ospf:area/extended-lsa-support - For OSPFv3
Extended LSAs, the ability to disable OSPFv3 Extended LSA support
result in a denial of service.
Some of the readable data nodes in the ietf-ospfv3-extended-lsa.yang
module may be considered sensitive or vulnerable in some network
environments. It is thus important to control read access (e.g., via
get, get-config, or notification) to these data nodes. The exposure
of the Link State Database (LSDB) will expose the detailed topology
of the network and information beyond the scope of OSPF router. This
may be undesirable since both due to the fact that exposure may
facilitate other attacks. Additionally, network operators may
consider their topologies to be sensitive confidential data.
6. IANA Considerations
This document registers a URI in the IETF XML registry [RFC3688].
Following the format in [RFC3688], the following registration is
requested to be made:
URI: urn:ietf:params:xml:ns:yang:ietf-ospfv3-extended-lsa
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
This document registers a YANG module in the YANG Module Names
registry [RFC6020].
name: ietf-ospfv3-extended-lsa
namespace: urn:ietf:params:xml:ns:yang:ietf-ospfv3-extended-lsa
prefix: ospfv3-e-lsa
reference: RFC XXXX
7. Acknowledgements
This document was produced using Marshall Rose's xml2rfc tool.
The YANG model was developed using the suite of YANG tools written
and maintained by numerous authors.
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Thanks much to Tom Petch for his review and comments.
8. References
8.1. Normative References
[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>.
[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>.
[RFC5340] Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF
for IPv6", RFC 5340, DOI 10.17487/RFC5340, July 2008,
<https://www.rfc-editor.org/info/rfc5340>.
[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>.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
<https://www.rfc-editor.org/info/rfc6242>.
[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>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>.
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[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>.
[RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing
Management", RFC 8022, DOI 10.17487/RFC8022, November
2016, <https://www.rfc-editor.org/info/rfc8022>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.
[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>.
[RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger,
"Common YANG Data Types for the Routing Area", RFC 8294,
DOI 10.17487/RFC8294, December 2017,
<https://www.rfc-editor.org/info/rfc8294>.
[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>.
[RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for
Routing Management (NMDA Version)", RFC 8349,
DOI 10.17487/RFC8349, March 2018,
<https://www.rfc-editor.org/info/rfc8349>.
[RFC8362] Lindem, A., Roy, A., Goethals, D., Reddy Vallem, V., and
F. Baker, "OSPFv3 Link State Advertisement (LSA)
Extensibility", RFC 8362, DOI 10.17487/RFC8362, April
2018, <https://www.rfc-editor.org/info/rfc8362>.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
<https://www.rfc-editor.org/info/rfc8446>.
8.2. Informative References
[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>.
Authors' Addresses
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Acee Lindem
Cisco Systems
301 Midenhall Way
Cary, NC 27513
Email: acee@cisco.com
Sharmila Palani
Microsoft
1 Microsoft Way
Redmond, WA 98052
Email: sharmila.palani@microsoft.com
Yingzhen Qu
Futurewei
2330 Central Expressway
Santa Clara, CA 95050
United States of America
Email: yingzhen.qu@futurewei.com
Lindem, et al. Expires 7 September 2022 [Page 29]