BGP Classful Transport Planes
draft-kaliraj-idr-bgp-classful-transport-planes-07

Document Type Active Internet-Draft (individual)
Authors Kaliraj Vairavakkalai  , Natrajan Venkataraman  , Balaji Rajagopalan  , Gyan Mishra  , Mazen Khaddam  , Xiaohu Xu  , Rafal Szarecki 
Last updated 2021-02-15
Replaces draft-kaliraj-idr-bgp-transport-vpn
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Network Working Group                                   K. Vairavakkalai
Internet-Draft                                           N. Venkataraman
Intended status: Standards Track                          B. Rajagopalan
Expires: August 19, 2021                          Juniper Networks, Inc.
                                                               G. Mishra
                                             Verizon Communications Inc.
                                                              M. Khaddam
                                                 Cox Communications Inc.
                                                                   X. Xu
                                                            Alibaba Inc.
                                                             R. Szarecki
                                                                 Google.
                                                       February 15, 2021

                     BGP Classful Transport Planes
           draft-kaliraj-idr-bgp-classful-transport-planes-07

Abstract

   This document specifies a mechanism, referred to as "service
   mapping", to express association of overlay routes with underlay
   routes satisfying a certain SLA, using BGP.  The document describes a
   framework for classifying underlay routes into transport classes, and
   mapping service routes to specific transport class.

   The "Transport class" construct maps to a desired SLA, and can be
   used to realize the "Topology Slice" in 5G Network slicing
   architecture.

   This document specifies BGP protocol procedures that enable
   dissimination of such service mapping information that may span
   multiple co-operating administrative domains.  These domains may be
   administetered by the same provider or closely co-ordinating provider
   networks.

   It makes it possible to advertise multiple tunnels to the same
   destination address, thus avoiding need of multiple loopbacks on the
   egress node.

   A new BGP transport layer address family (SAFI 76) is defined for
   this purpose that uses RFC-4364 technology and follows RFC-8277 NLRI
   encoding.  This new address family is called "BGP Classful
   Transport", aka BGP CT.

   It carries transport prefixes across tunnel domain boundaries (e.g.
   in Inter-AS Option-C networks), parallel to BGP LU (SAFI 4) . It
   dissiminates "Transport class" information for the transport prefixes

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Internet-Draft        BGP Classful Transport Planes        February 2021

   across the participating domains, which is not possible with BGP LU.
   This makes the end-to-end network a "Transport Class" aware tunneled
   network.

Requirements Language

   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].

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on August 19, 2021.

Copyright Notice

   Copyright (c) 2021 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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   (https://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Transport Class . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  "Transport Class" Route Target Extended Community . . . . . .   7
   5.  Transport RIB . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Transport Routing Instance  . . . . . . . . . . . . . . . . .   9
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