IS-IS Route Preference for Extended IP and IPv6 Reachability
RFC 7775, “IS-IS Route Preference for Extended IP and IPv6 Reachability”, is a Proposed Standard document published in February 2016 by L. Ginsberg, S. Litkowski, S. Previdi. It updates RFC 5308. The canonical text is published by the RFC Editor.
Abstract
In existing specifications, the route preferences for IPv4/IPv6 Extended Reachability TLVs are not explicitly stated. There are also inconsistencies in the definition of how the up/down bit applies to route preference when the prefix advertisement appears in Level 2 Link State Protocol Data Units (LSPs). This document addresses these issues.
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 7775 is hosted at rfc-editor.org. Available in TXT,HTML.
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