Distribution of MPLS-TE Extended admin Group Using BGP
draft-wang-idr-eag-distribution-01

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IDR Working Group                                                Z. Wang
Internet-Draft                                                     Q. Wu
Intended status: Standards Track                                  Huawei
Expires: September 5, 2015                                 March 4, 2015

         Distribution of MPLS-TE Extended admin Group Using BGP
                   draft-wang-idr-eag-distribution-01

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 [RFC7308]
   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
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   This Internet-Draft will expire on September 5, 2015.

Copyright Notice

   Copyright (c) 2015 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
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   include Simplified BSD License text as described in Section 4.e of

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   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 [RFC7308]
   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].

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   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-
   distribution]are TLVs that may be encoded in the BGP-LS attribute
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