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Hierarchical IS-IS

Document Type Replaced Internet-Draft (individual)
Expired & archived
Author Tony Li
Last updated 2018-06-29
Replaced by draft-li-lsr-isis-hierarchical-isis
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-li-lsr-isis-hierarchical-isis
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This Internet-Draft is no longer active.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:


The IS-IS routing protocol was originally defined with a two level hierarchical structure. This was adequate for the networks at the time. As we continue to expand the scale of our networks, it is apparent that additional hierarchy would be a welcome degree of flexibility in network design. This document defines IS-IS Levels 3 through 8.


Tony Li

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