Distribution of Traffic Engineering Extended Admin Groups using BGP-LS
draft-ietf-idr-eag-distribution-13

Document Type Active Internet-Draft (idr WG)
Authors Zitao Wang  , Qin Wu  , Jeff Tantsura  , Ketan Talaulikar 
Last updated 2020-11-19 (latest revision 2020-11-15)
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: May 19, 2021                                        J. Tantsura
                                                            Apstra, Inc.
                                                           K. Talaulikar
                                                           Cisco Systems
                                                       November 15, 2020

 Distribution of Traffic Engineering Extended Admin Groups using BGP-LS
                   draft-ietf-idr-eag-distribution-13

Abstract

   Administrative groups are link attributes (commonly referred to as
   "colors" or "link colors") advertised by link state protocols (e.g.
   ISIS or OSPF) and used for traffic engineering.  These administrative
   groups were initially defined as 32 bit masks.  As network usage
   grew, these 32 bit masks were found to constrain traffic engineering.
   Therefore, link state protocols (ISIS, OSPF) were expanded to
   advertise a variable length administrative group.

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 May 19, 2021.

Copyright Notice

   Copyright (c) 2020 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

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   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
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   2
   2.  Advertising Extended Administrative Groups in BGP-LS  . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   Administrative groups (commonly referred to as "colors" or "link
   colors") are link attributes that are advertised by link state
   protocols like IS-IS [RFC5305], OSPFv2 [RFC3630] and OSPFv3 [RFC5329]
   for traffic engineering use-cases.  The BGP-LS advertisement is
   encoded using the Administrative Group (color) TLV 1088 as defined in
   [RFC7752].

   These administrative groups are defined as a fixed-length 32-bit
   bitmask.  As networks grew and more use-cases were introduced, the
   32-bit length was found to be constraining and hence extended
   administrative groups (EAG) were introduced in the IS-IS and OSPFv2
   link state routing protocols [RFC7308].

   This document specifies extensions to BGP-LS for advertisement of the
   extended administrative groups.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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2.  Advertising Extended Administrative Groups in BGP-LS

   This document defines extensions that enable BGP-LS speakers to
   signal the EAG of links in a network to a BGP-LS consumer of network
   topology such as a centralized controller.  The centralized
   controller can leverage this information in traffic engineering
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