draft-ietf-idr-ext-opt-param-10.txt   draft-ietf-idr-ext-opt-param-11.txt 
Internet Engineering Task Force E. Chen Internet Engineering Task Force E. Chen
Internet-Draft Palo Alto Networks Internet-Draft Palo Alto Networks
Updates: 4271 (if approved) J. Scudder Updates: 4271 (if approved) J. Scudder
Intended status: Standards Track Juniper Networks Intended status: Standards Track Juniper Networks
Expires: September 23, 2021 March 22, 2021 Expires: September 24, 2021 March 23, 2021
Extended Optional Parameters Length for BGP OPEN Message Extended Optional Parameters Length for BGP OPEN Message
draft-ietf-idr-ext-opt-param-10 draft-ietf-idr-ext-opt-param-11
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 concern about foreseeably exceed 255 octets in the future, leading to concern about
this limitation. this limitation.
This document updates RFC 4271 by extending, in a backward-compatible This document updates RFC 4271 by extending, in a backward-compatible
skipping to change at page 1, line 40 skipping to change at page 1, line 40
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 23, 2021. This Internet-Draft will expire on September 24, 2021.
Copyright Notice Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 2, line 42 skipping to change at page 2, line 42
14 [RFC2119] [RFC8174] when, and only when, they appear in all 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here. capitals, as shown here.
2. Protocol Extensions 2. Protocol Extensions
This document reserves Optional Parameter Type code 255 as the This document reserves Optional Parameter Type code 255 as the
"Extended Length" type code. "Extended Length" type code.
In the event that the length of Optional Parameters in the BGP OPEN In the event that the length of Optional Parameters in the BGP OPEN
message does not exceed 255, the encodings of the base BGP message does not exceed 255, the encodings of the base BGP
specification [RFC4271] MUST be used without alteration. However, an specification [RFC4271] MUST be used without alteration. (However,
implementation MUST be prepared to accept an OPEN message that uses an implementation MUST accept an OPEN message that uses the encoding
the encoding of this specification for Optional Parameters of any of this specification even if the length of Optional Parameters is
length. 255 or less.)
However, if the length of Optional Parameters in the BGP OPEN message However, if the length of Optional Parameters in the BGP OPEN message
does exceed 255, the OPEN message MUST be encoded according to the does exceed 255, the OPEN message MUST be encoded according to the
procedure below. procedure below.
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
| Version | | Version |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 End of changes. 4 change blocks. 
7 lines changed or deleted 7 lines changed or added

This html diff was produced by rfcdiff 1.48. The latest version is available from http://tools.ietf.org/tools/rfcdiff/