BGP Extended Community for Identifying the Target Node
draft-dong-idr-node-target-ext-comm-01

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Last updated 2019-07-08
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Network Working Group                                            J. Dong
Internet-Draft                                                 S. Zhuang
Intended status: Standards Track                     Huawei Technologies
Expires: January 9, 2020                                 G. Van de Velde
                                                                   Nokia
                                                            July 8, 2019

         BGP Extended Community for Identifying the Target Node
                 draft-dong-idr-node-target-ext-comm-01

Abstract

   BGP has been used to distribute different types of routing and policy
   information in the network.  In some cases, the information
   distributed may be only intended for one or several particular
   receiving BGP nodes in the network.  However, BGP does not have a
   general mechanism for designating the receiving node 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
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   This Internet-Draft will expire on January 9, 2020.

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Copyright Notice

   Copyright (c) 2019 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
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   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.  Node Target Extended Communities  . . . . . . . . . . . . . .   3
     2.1.  IPv4 Node Target Extended Community . . . . . . . . . . .   3
     2.2.  IPv6 Node Target Extended Community . . . . . . . . . . .   4
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   BGP [RFC4271] has been used to distribute different types of routing
   and policy information in the network.  In some cases, the
   information distributed may be only intended for one or several
   particular receiving BGP nodes in the network.  A typical use case is
   the distribution of BGP FlowSpec [RFC5575] [I-D.ietf-idr-rfc5575bis]
   policies to some particular BGP nodes.

   However, BGP does not have a general mechanism for designating the
   receiving nodes of the information to be distributed.  Route Target
   (RT) as defined in [RFC4364] is used for the distribution of VPN
   routes into the target VPN Routing and Forwarding tables (VRFs) on a
   set of PE nodes.  Although it is possible to use RTs to control the
   distribution of non VPN-specific information to a particular node,
   such mechanism is not applicable when the information to be
   distributed is VPN-specific and relies on RTs to match the target

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   VRF.  Thus a mechanism which is independent from the control of VPN
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