IS-IS Topology-Transparent Zone

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Huaimo Chen  , Richard Li  , Gregory Cauchie  , Ning So  , Alvaro Retana 
Last updated 2013-11-04 (latest revision 2013-05-03)
Replaced by draft-ietf-lsr-isis-ttz
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document presents a topology-transparent zone in a domain. A topology-transparent zone comprises a group of routers and a number of circuits connecting these routers. Any router outside of the zone is not aware of the zone. The information about the circuits and routers inside the zone is not distributed to any router outside of the zone. Any link state change such as a circuit down inside the zone is not seen by any router outside of the zone.


Huaimo Chen (
Richard Li (
Gregory Cauchie (
Ning So (
Alvaro Retana (

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