BGP Traffic Engineering Attribute
RFC 5543
| Document | Type |
RFC - Proposed Standard
(May 2009; No errata)
Updated by RFC 7606
|
|
|---|---|---|---|
| Last updated | 2018-12-20 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5543 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Mark Townsley | ||
| Send notices to | (None) | ||
Network Working Group H. Ould-Brahim
Request for Comments: 5543 Nortel Networks
Category: Standards Track D. Fedyk
Alcatel-Lucent
Y. Rekhter
Juniper Networks
May 2009
BGP Traffic Engineering Attribute
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Abstract
This document defines a new BGP attribute, the Traffic Engineering
attribute, that enables BGP to carry Traffic Engineering information.
The scope and applicability of this attribute currently excludes its
use for non-VPN reachability information.
Ould-Brahim, et al. Standards Track [Page 1]
RFC 5543 BGP TE Attribute May 2009
1. Introduction
In certain cases (e.g., Layer-1 VPNs (L1VPNs) [RFC5195]), it may be
useful to augment the VPN reachability information carried in BGP
with Traffic Engineering information.
This document defines a new BGP attribute, the Traffic Engineering
attribute, that enables BGP [RFC4271] to carry Traffic Engineering
information.
Section 4 of [RFC5195] describes one possible usage of this
attribute.
The scope and applicability of this attribute currently excludes its
use for non-VPN reachability information.
Procedures for modifying the Traffic Engineering attribute, when
re-advertising a route that carries such an attribute, are outside
the scope of this document.
2. Specification of Requirements
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
3. Traffic Engineering Attribute
The Traffic Engineering attribute is an optional, non-transitive BGP
attribute.
The information carried in this attribute is identical to what is
carried in the Interface Switching Capability Descriptor, as
specified in [RFC4203] and [RFC5307].
The attribute contains one or more of the following:
Ould-Brahim, et al. Standards Track [Page 2]
RFC 5543 BGP TE Attribute May 2009
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Switching Cap | Encoding | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Max LSP Bandwidth at priority 7 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Switching Capability specific information |
| (variable) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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