Distribution of MPLS-TE Extended admin Group Using BGP
draft-wang-idr-eag-distribution-00
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Zitao Wang
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Qin Wu
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2014-09-20
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draft-ietf-idr-eag-distribution
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IDR Working Group Z. Wang
Internet-Draft Q. Wu
Intended status: Standards Track Huawei
Expires: March 24, 2015 September 20, 2014
Distribution of MPLS-TE Extended admin Group Using BGP
draft-wang-idr-eag-distribution-00
Abstract
As MPLS-TE network grows, administrative Groups advertised as a
fixed-length 32-bit Bitmask is quite constraining. "Extended
Administrative Group" IGP TE extensions sub-TLV defined in [I-D.ietf-
mpls-extended-admin-group] is introduced to provide for additional
administrative groups (link colors) beyond the current limit of 32.
This document describes extensions to BGP protocol, that can be used
to distribute extended administrative groups in MPLS-TE.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on March 24, 2015.
Copyright Notice
Copyright (c) 2014 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
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
Wang & Wu Expires March 24, 2015 [Page 1]
Internet-Draft Extended admin Group September 2014
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 2
3. Carrying Extended Administrative Groups in BGP . . . . . . . 2
3.1. AG and EAG coexistence . . . . . . . . . . . . . . . . . 3
3.2. Desire for unadvertised EAG bits . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 4
7. Normative References . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
MPLS-TE advertises 32 administrative groups (commonly referred to as
"colors" or "link colors") using the Administrative Group sub-TLV of
the Link TLV defined in OSPFv2 (RFC3630), OSPFv3 (RFC5329) and ISIS
(RFC5305).
As MPLS-TE network grows, administrative Groups advertised as a
fixed-length 32-bit Bitmask is quite constraining. "Extended
Administrative Group" IGP TE extensions sub-TLV defined in [I-D.ietf-
mpls-extended-admin-group] is introduced to provide for additional
administrative groups (link colors) beyond the current limit of 32.
This document proposes new BGP Link attribute TLVs that can be
announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-
idr-ls-distribution]) to distribute extended administrative groups in
MPLS-TE.
2. Conventions used in this document
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 RFC2119 [RFC2119].
3. Carrying Extended Administrative Groups in BGP
This document proposes one new BGP link attribute TLVs that can be
announced as attribute in the BGP-LS attribute (defined in [I.D-ietf-
idr-ls-distribution]) to distribute extended administrative groups.
The extensions in this document build on the ones provided in BGP-LS
[I.D-ietf-idr-ls-distribution] and BGP-4 [RFC4271].
Wang & Wu Expires March 24, 2015 [Page 2]
Internet-Draft Extended admin Group September 2014
BGP-LS attribute defined in [I.D-ietf-idr-ls-distribution] has nested
TLVs which allow the BGP-LS attribute to be readily extended. Link
attribute TLVs defined in section 3.2.2 of [I-D.ietf-idr-ls-
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