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Prefix Flag Extension for OSPFv2 and OSPFv3

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Ran Chen , Detao Zhao , Peter Psenak , Ketan Talaulikar
Last updated 2023-11-05
Replaced by draft-ietf-lsr-ospf-prefix-extended-flags
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-lsr-ospf-prefix-extended-flags
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Within OSPF, each prefix is advertised along with an 8-bit field of capabilities, by using the Prefix Options (OSPFv3) and the flag flield in the OSPFv2 Extended Prefix TLV (OSPFv2). However, for OSPFv3, all the bits of the Prefix Options have already been assigned, and for OSPFv2, there are not many undefined bits left in the OSPFv2 Extended Prefix TLV. This document solves the problem of insufficient existing flags, and defines the variable length Prefix attributes Sub-TLVs for OSPFv2 and OSPFv3 respectively for the extended flag fields.


Ran Chen
Detao Zhao
Peter Psenak
Ketan Talaulikar

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