Area Proxy for IS-IS
RFC 9666, “Area Proxy for IS-IS”, is an Experimental document published in October 2024 by T. Li, S. Chen, V. Ilangovan, G. Mishra. The canonical text is published by the RFC Editor.
Abstract
Link-state routing protocols have hierarchical abstraction already built into them. However, when lower levels are used for transit, they must expose their internal topologies to each other, thereby leading to scaling issues.
To avoid such issues, this document discusses extensions to the IS-IS routing protocol that allow Level 1 (L1) areas to provide transit but only inject an abstraction of the Level 1 topology into Level 2 (L2). Each Level 1 area is represented as a single Level 2 node, thereby enabling a greater scale.
What “Experimental” means
Describes a specification that is part of a research or development effort, published so the community can gain experience with it.
The canonical text of RFC 9666 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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