Use of BGP Large Communities
draft-ietf-grow-large-communities-usage-07

Document Type Active Internet-Draft (grow WG)
Last updated 2017-05-16 (latest revision 2017-04-20)
Replaces draft-snijders-grow-large-communities-usage
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Global Routing Operations                                    J. Snijders
Internet-Draft                                                J. Heasley
Intended status: Informational                                       NTT
Expires: October 21, 2017                                     M. Schmidt
                                                                 i3D.net
                                                          April 19, 2017

                      Use of BGP Large Communities
               draft-ietf-grow-large-communities-usage-07

Abstract

   This document presents examples and inspiration for operator's
   application of BGP Large Communities.  Based on operational
   experience with BGP Communties, this document suggests logical
   categories of BGP Large Communities and demonstrates an orderly
   manner of organizing community values within them to achieve typical
   goals in routing policy.  Any operator can consider using the
   concepts presented as the basis for their own BGP Large Communities
   repertoire.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on October 21, 2017.

Copyright Notice

   Copyright (c) 2017 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Snijders, et al.        Expires October 21, 2017                [Page 1]
Internet-Draft        Use of BGP Large Communities            April 2017

   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
   2.  The Design Overview . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Informational Communities . . . . . . . . . . . . . . . .   4
     2.2.  Action Communities  . . . . . . . . . . . . . . . . . . .   4
   3.  Examples of Informational Communities . . . . . . . . . . . .   5
     3.1.  Location  . . . . . . . . . . . . . . . . . . . . . . . .   5
       3.1.1.  An ISO 3166-1 Numeric Function  . . . . . . . . . . .   5
       3.1.2.  An UN M.49 Region Function  . . . . . . . . . . . . .   5
     3.2.  Relation Function . . . . . . . . . . . . . . . . . . . .   6
     3.3.  Combining Informational Communities . . . . . . . . . . .   6
   4.  Examples of Action Communities  . . . . . . . . . . . . . . .   7
     4.1.  Selective NO_EXPORT . . . . . . . . . . . . . . . . . . .   7
       4.1.1.  ASN Based Selective NO_EXPORT . . . . . . . . . . . .   7
       4.1.2.  Location Based Selective NO_EXPORT  . . . . . . . . .   7
     4.2.  Selective AS_PATH Prepending  . . . . . . . . . . . . . .   8
       4.2.1.  ASN Based Selective AS_PATH Prepending  . . . . . . .   8
       4.2.2.  Location Based Selective AS_PATH Prepending . . . . .   9
     4.3.  Manipulation of the LOCAL_PREF Attribute  . . . . . . . .   9
       4.3.1.  Global Manipulation of LOCAL_PREF . . . . . . . . . .  10
       4.3.2.  Region Based Manipulation of LOCAL_PREF . . . . . . .  10
       4.3.3.  Note of Caution for LOCAL_PREF Functions  . . . . . .  11
     4.4.  Route Server Prefix Distribution Control  . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  13
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  13
     8.3.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction
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