Extensions to OSPF for Advertising Optional Router Capabilities
RFC 7770
| Document | Type |
RFC - Proposed Standard
(February 2016; No errata)
Obsoletes RFC 4970
|
|
|---|---|---|---|
| Last updated | 2016-02-01 | ||
| Replaces | draft-acee-ospf-rfc4970bis | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Yingzhen Qu | ||
| Shepherd write-up | Show (last changed 2015-09-09) | ||
| IESG | IESG state | RFC 7770 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alia Atlas | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) A. Lindem, Ed.
Request for Comments: 7770 N. Shen
Obsoletes: 4970 JP. Vasseur
Category: Standards Track Cisco Systems
ISSN: 2070-1721 R. Aggarwal
Arktan
S. Shaffer
Akamai
February 2016
Extensions to OSPF for Advertising Optional Router Capabilities
Abstract
It is useful for routers in an OSPFv2 or OSPFv3 routing domain to
know the capabilities of their neighbors and other routers in the
routing domain. This document proposes extensions to OSPFv2 and
OSPFv3 for advertising optional router capabilities. The Router
Information (RI) Link State Advertisement (LSA) is defined for this
purpose. In OSPFv2, the RI LSA will be implemented with an Opaque
LSA type ID. In OSPFv3, the RI LSA will be implemented with a unique
LSA type function code. In both protocols, the RI LSA can be
advertised at any of the defined flooding scopes (link, area, or
autonomous system (AS)). This document obsoletes RFC 4970 by
providing a revised specification that includes support for
advertisement of multiple instances of the RI LSA and a TLV for
functional capabilities.
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 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7770.
Lindem, et al. Standards Track [Page 1]
RFC 7770 OSPF Capability Extensions February 2016
Copyright Notice
Copyright (c) 2016 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
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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 . . . . . . . . . . . . . . . . . . 3
1.2. Summary of Changes from RFC 4970 . . . . . . . . . . . . 3
2. OSPF Router Information (RI) LSA . . . . . . . . . . . . . . 4
2.1. OSPFv2 Router Information (RI) Opaque LSA . . . . . . . . 4
2.2. OSPFv3 Router Information (RI) Opaque LSA . . . . . . . . 5
2.3. OSPF Router Information LSA TLV Format . . . . . . . . . 6
2.4. OSPF Router Informational Capabilities TLV . . . . . . . 6
2.5. Assigned OSPF Router Informational Capability Bits . . . 7
2.6. OSPF Router Functional Capabilities TLV . . . . . . . . . 8
2.7. Flooding Scope of the Router Information LSA . . . . . . 9
3. Backwards Compatibility . . . . . . . . . . . . . . . . . . . 9
4. Security Considerations . . . . . . . . . . . . . . . . . . . 9
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
5.1. OSPFv2 Opaque LSA Type Assignment . . . . . . . . . . . . 10
5.2. OSPFv3 LSA Function Code Assignment . . . . . . . . . . . 10
5.3. OSPF RI LSA TLV Type Assignment . . . . . . . . . . . . . 11
5.4. Registry for OSPF Router Informational Capability Bits . 12
5.5. Registry for OSPF Router Functional Capability Bits . . . 12
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1. Normative References . . . . . . . . . . . . . . . . . . 12
6.2. Informative References . . . . . . . . . . . . . . . . . 13
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
Lindem, et al. Standards Track [Page 2]
RFC 7770 OSPF Capability Extensions February 2016
1. Introduction
It is useful for routers in an OSPFv2 [OSPF] or OSPFv3 [OSPFv3]
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