OSPFv3 Link State Advertisement (LSA) Extensibility
RFC 8362
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RFC - Proposed Standard
(April 2018; No errata)
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Last updated |
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2018-12-19
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Replaces |
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draft-acee-ospfv3-lsa-extend
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Stream |
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Peter Psenak
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Shepherd write-up |
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Show
(last changed 2017-11-26)
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| IESG |
IESG state |
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RFC 8362 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Alvaro Retana
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Send notices to |
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Peter Psenak <ppsenak@cisco.com>, aretana.ietf@gmail.com
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) A. Lindem
Request for Comments: 8362 A. Roy
Updates: 5340, 5838 Cisco Systems
Category: Standards Track D. Goethals
ISSN: 2070-1721 Nokia
V. Reddy Vallem
F. Baker
April 2018
OSPFv3 Link State Advertisement (LSA) Extensibility
Abstract
OSPFv3 requires functional extension beyond what can readily be done
with the fixed-format Link State Advertisement (LSA) as described in
RFC 5340. Without LSA extension, attributes associated with OSPFv3
links and advertised IPv6 prefixes must be advertised in separate
LSAs and correlated to the fixed-format LSAs. This document extends
the LSA format by encoding the existing OSPFv3 LSA information in
Type-Length-Value (TLV) tuples and allowing advertisement of
additional information with additional TLVs. Backward-compatibility
mechanisms are also described.
This document updates RFC 5340, "OSPF for IPv6", and RFC 5838,
"Support of Address Families in OSPFv3", by providing TLV-based
encodings for the base OSPFv3 unicast support and OSPFv3 address
family support.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8362.
Lindem, et al. Standards Track [Page 1]
RFC 8362 OSPFv3 LSA Extensibility April 2018
Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved.
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 Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Notation . . . . . . . . . . . . . . . . . . 4
1.2. OSPFv3 LSA Terminology . . . . . . . . . . . . . . . . . 4
2. OSPFv3 Extended LSA Types . . . . . . . . . . . . . . . . . . 4
3. OSPFv3 Extended LSA TLVs . . . . . . . . . . . . . . . . . . 5
3.1. Prefix Options Extensions . . . . . . . . . . . . . . . . 6
3.1.1. N-bit Prefix Option . . . . . . . . . . . . . . . . . 7
3.2. Router-Link TLV . . . . . . . . . . . . . . . . . . . . . 8
3.3. Attached-Routers TLV . . . . . . . . . . . . . . . . . . 9
3.4. Inter-Area-Prefix TLV . . . . . . . . . . . . . . . . . . 10
3.5. Inter-Area-Router TLV . . . . . . . . . . . . . . . . . . 11
3.6. External-Prefix TLV . . . . . . . . . . . . . . . . . . . 12
3.7. Intra-Area-Prefix TLV . . . . . . . . . . . . . . . . . . 13
3.8. IPv6 Link-Local Address TLV . . . . . . . . . . . . . . . 14
3.9. IPv4 Link-Local Address TLV . . . . . . . . . . . . . . . 14
3.10. IPv6-Forwarding-Address Sub-TLV . . . . . . . . . . . . . 15
3.11. IPv4-Forwarding-Address Sub-TLV . . . . . . . . . . . . . 15
3.12. Route-Tag Sub-TLV . . . . . . . . . . . . . . . . . . . . 16
4. OSPFv3 Extended LSAs . . . . . . . . . . . . . . . . . . . . 16
4.1. OSPFv3 E-Router-LSA . . . . . . . . . . . . . . . . . . . 16
4.2. OSPFv3 E-Network-LSA . . . . . . . . . . . . . . . . . . 18
4.3. OSPFv3 E-Inter-Area-Prefix-LSA . . . . . . . . . . . . . 19
4.4. OSPFv3 E-Inter-Area-Router-LSA . . . . . . . . . . . . . 20
4.5. OSPFv3 E-AS-External-LSA . . . . . . . . . . . . . . . . 21
4.6. OSPFv3 E-NSSA-LSA . . . . . . . . . . . . . . . . . . . . 22
4.7. OSPFv3 E-Link-LSA . . . . . . . . . . . . . . . . . . . . 22
4.8. OSPFv3 E-Intra-Area-Prefix-LSA . . . . . . . . . . . . . 24
5. Malformed OSPFv3 Extended LSA Handling . . . . . . . . . . . 25
6. LSA Extension Backward Compatibility . . . . . . . . . . . . 25
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