Search RFCs

RFC Editor

File formats:

Status:

PROPOSED STANDARD

Obsoletes:

RFC 2966

Updates:

RFC 1195

Authors:

T. Li
H. Smit
T. Przygienda

Stream:

IETF

Source:

isis (rtg)

Cite this RFC:TXT  | XML  |  BibTeX

DOI:  https://doi.org/10.17487/RFC5302

Discuss this RFC: Send questions or comments to the mailing listlsr@ietf.org

Other actions:View Errata  | Submit Errata  | Find IPR Disclosures from the IETF  | View History of RFC 5302

Abstract

This document describes extensions to the Intermediate System toIntermediate System (IS-IS) protocol to support optimal routingwithin a two-level domain. The IS-IS protocol is specified in ISO10589, with extensions for supporting IPv4 (Internet Protocol)specified in RFC 1195. This document replaces RFC 2966.

This document extends the semantics presented in RFC 1195 so that arouting domain running with both level 1 and level 2 IntermediateSystems (IS) (routers) can distribute IP prefixes between level 1 andlevel 2, and vice versa. This distribution requires certainrestrictions to ensure that persistent forwarding loops do not form.The goal of this domain-wide prefix distribution is to increase thegranularity of the routing information within the domain. [STANDARDS-TRACK]

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.