rfc9072v2.txt   rfc9072.txt 
Internet Engineering Task Force (IETF) E. Chen Internet Engineering Task Force (IETF) E. Chen
Request for Comments: 9072 Palo Alto Networks Request for Comments: 9072 Palo Alto Networks
Updates: 4271 J. Scudder Updates: 4271 J. Scudder
Category: Standards Track Juniper Networks Category: Standards Track Juniper Networks
ISSN: 2070-1721 June 2021 ISSN: 2070-1721 July 2021
Extended Optional Parameters Length for BGP OPEN Message Extended Optional Parameters Length for BGP OPEN Message
Abstract Abstract
The Optional Parameters in the BGP OPEN message as defined in the 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 base BGP specification are limited to 255 octets due to a one-octet
length field. BGP capabilities are carried in this field and may length field. BGP capabilities are carried in this field and may
foreseeably exceed 255 octets in the future, leading to concerns foreseeably exceed 255 octets in the future, leading to concerns
about this limitation. about this limitation.
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