Distribution of MPLS-TE Extended admin Group Using BGP
draft-ietf-idr-eag-distribution-06

Document Type Active Internet-Draft (idr WG)
Last updated 2018-03-21 (latest revision 2018-03-19)
Replaces draft-wang-idr-eag-distribution
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IDR Working Group                                                Z. Wang
Internet-Draft                                                     Q. Wu
Intended status: Standards Track                                  Huawei
Expires: September 20, 2018                                  J. Tantsura
                                                          Nuage Networks
                                                          March 19, 2018

         Distribution of MPLS-TE Extended admin Group Using BGP
                   draft-ietf-idr-eag-distribution-06

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 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
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   This Internet-Draft will expire on September 20, 2018.

Copyright Notice

   Copyright (c) 2018 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
   (https://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

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   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   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.

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   The extensions in this document build on the ones provided in BGP-LS
   [RFC7752] and BGP-4 [RFC4271].

   BGP-LS attribute defined in [RFC7752] has nested TLVs which allow the
   BGP-LS attribute to be readily extended.  Link attribute TLVs defined
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