BGP Extended Community for Identifying the Target Nodes
draft-dong-idr-node-target-ext-comm-03

Document Type Active Internet-Draft (individual)
Authors Jie Dong  , Shunwan Zhuang  , Gunter Van de Velde 
Last updated 2020-11-02
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Network Working Group                                            J. Dong
Internet-Draft                                                 S. Zhuang
Intended status: Standards Track                     Huawei Technologies
Expires: May 6, 2021                                     G. Van de Velde
                                                                   Nokia
                                                        November 2, 2020

        BGP Extended Community for Identifying the Target Nodes
                 draft-dong-idr-node-target-ext-comm-03

Abstract

   BGP has been used to distribute different types of routing and policy
   information.  In some cases, the information distributed may be only
   intended for one or a particular group of BGP nodes in the network.
   Currently BGP does not have a generic mechanism of designating the
   target nodes of the routing information.  This document defines a new
   type of BGP Extended Community called "Node Target".  The mechanism
   of using the Node Target Extended Community to steer BGP route
   distribution to particular BGP nodes is specified.

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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   This Internet-Draft will expire on May 6, 2021.

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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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Node Target Extended Communities  . . . . . . . . . . . . . .   3
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Compatibility Considerations  . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   BGP [RFC4271] has been used to distribute different types of routing
   and policy information.  In some cases, the information distributed
   may be only intended for one or a particular group receiving BGP
   nodes in the network.  One typical use case is the distribution of
   BGP Flow Spec [I-D.ietf-idr-rfc5575bis] [I-D.ietf-idr-flow-spec-v6]
   rules only to a particular group of BGP nodes.  Such a targeting
   mechanism is considered useful that it can save the resources on
   nodes which do not need that information.

   Currently BGP does not have a generic mechanism of designating the
   set of nodes to which the information is to be distributed.  Route
   Target (RT) as defined in [RFC4364] was designed for the matching of
   VPN routes into the target VPN Routing and Forwarding tables (VRFs)
   on PE nodes.  Although [I-D.ietf-idr-segment-routing-te-policy]
   introduces the mechanism of steering the SR policy information to the
   target head end node based on RT, it is only defined for the SR

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