Maintaining more than 255 adjacencies in IS-IS

Document Type Expired Internet-Draft (isis WG)
Author Tony Przygienda 
Last updated 1999-10-11
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This draft describes an optional implementation technique within IS-IS [ISO90, Cal90a, Cal90b] used today by several ISPs for routing within their clouds. IS-IS is an interior gateway routing protocol developed originally by OSI and used with IP extensions as IGP. This draft describes how to effectively bypass the problem of 255 circuits that IS-IS allows to maintain with minor violations of the specification that however does not prevent interoperability with existing implementations.


Tony Przygienda (

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