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Extensions to OSPF for Advertising Prefix Administrative Tags

Document Type Replaced Internet-Draft (lsr WG)
Expired & archived
Authors Acee Lindem , Peter Psenak
Last updated 2021-01-20 (Latest revision 2020-09-23)
Replaced by draft-ietf-lsr-ospf-admin-tags
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd Christian Hopps
IESG IESG state Replaced by draft-ietf-lsr-ospf-admin-tags
Consensus boilerplate Yes
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


It is useful for routers in an OSPFv2 or OSPFv3 routing domain to be able to associate tags with prefixes. Previously, OSPFv2 and OSPFv3 were relegated to a single tag for AS External and Not-So-Stubby-Area (NSSA) prefixes. With the flexible encodings provided by OSPFv2 Prefix/Link Attribute Advertisement and OSPFv3 Extended LSAs, multiple administrative tags may advertised for all types of prefixes. These administrative tags can be used for many applications including route redistribution policy, selective prefix prioritization, selective IP Fast-ReRoute (IPFRR) prefix protection, and many others. The ISIS protocol supports a similar mechanism that is described in RFC 5130.


Acee Lindem
Peter Psenak

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)