Domain-Wide Prefix Distribution with Two-Level IS-IS
RFC 5302, “Domain-Wide Prefix Distribution with Two-Level IS-IS”, is a Proposed Standard document published in October 2008 by T. Li, H. Smit, T. Przygienda. It updates RFC 1195. It obsoletes RFC 2966. The canonical text is published by the RFC Editor.
Abstract
This document describes extensions to the Intermediate System to Intermediate System (IS-IS) protocol to support optimal routing within a two-level domain. The IS-IS protocol is specified in ISO 10589, 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 a routing domain running with both level 1 and level 2 Intermediate Systems (IS) (routers) can distribute IP prefixes between level 1 and level 2, and vice versa. This distribution requires certain restrictions to ensure that persistent forwarding loops do not form. The goal of this domain-wide prefix distribution is to increase the granularity of the routing information within the domain. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 5302 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 5301 Dynamic Hostname Exchange Mechanism for IS-IS
- RFC 5303 Three-Way Handshake for IS-IS Point-to-Point Adjacencies
- RFC 5304 IS-IS Cryptographic Authentication
- RFC 5305 IS-IS Extensions for Traffic Engineering
- RFC 5298 Analysis of Inter-Domain Label Switched Path Recovery
- RFC 5306 Restart Signaling for IS-IS
- RFC 5297 Synthetic Initialization Vector Authenticated Encryption Using the Advanced Encryption Standard
- RFC 5307 IS-IS Extensions in Support of Generalized Multi-Protocol Label Switching