Extended Optional Parameters Length for BGP OPEN Message

The information below is for an old version of the document
Document Type Expired Internet-Draft (idr WG)
Last updated 2015-07-20 (latest revision 2015-01-13)
Replaces draft-chen-bgp-ext-opt-param
Stream IETF
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Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Optional Parameters in the BGP OPEN message as defined in the base BGP specification are limited to 255 octets due to a one-octet length field. BGP Capabilities are carried in this field and may foreseeably exceed 255 octets in the future, leading to concern about this limitation. In this document we extend the BGP OPEN length field in a backward- compatible manner. The Parameter Length field of individual Optional Parameters is similarly extended.


Enke Chen (enkechen@cisco.com)
John Scudder (jgs@juniper.net)

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