Internet Exchange BGP Route Server
RFC 7947

Document Type RFC - Proposed Standard (September 2016; No errata)
Last updated 2016-09-07
Replaces draft-jasinska-ix-bgp-route-server
Stream IETF
Formats plain text pdf html bibtex
Stream WG state Submitted to IESG for Publication
Document shepherd Susan Hares
Shepherd write-up Show (last changed 2016-06-09)
IESG IESG state RFC 7947 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to aretana@cisco.com
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                       E. Jasinska
Request for Comments: 7947                                    BigWave IT
Category: Standards Track                                    N. Hilliard
ISSN: 2070-1721                                                     INEX
                                                               R. Raszuk
                                                            Bloomberg LP
                                                               N. Bakker
                                                Akamai Technologies B.V.
                                                          September 2016

                   Internet Exchange BGP Route Server

Abstract

   This document outlines a specification for multilateral
   interconnections at Internet Exchange Points (IXPs).  Multilateral
   interconnection is a method of exchanging routing information among
   three or more External BGP (EBGP) speakers using a single
   intermediate broker system, referred to as a route server.  Route
   servers are typically used on shared access media networks, such as
   IXPs, to facilitate simplified interconnection among multiple
   Internet routers.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7947.

Jasinska, et al.             Standards Track                    [Page 1]
RFC 7947                  IXP BGP Route Server            September 2016

Copyright Notice

   Copyright (c) 2016 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
   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 to Multilateral Interconnection  . . . . . . . .   3
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   3
   2.  Technical Considerations for Route Server Implementations . .   4
     2.1.  Client UPDATE Messages  . . . . . . . . . . . . . . . . .   4
     2.2.  Attribute Transparency  . . . . . . . . . . . . . . . . .   4
       2.2.1.  NEXT_HOP Attribute  . . . . . . . . . . . . . . . . .   4
       2.2.2.  AS_PATH Attribute . . . . . . . . . . . . . . . . . .   5
         2.2.2.1.  Route Server AS_PATH Management . . . . . . . . .   5
         2.2.2.2.  Route Server client AS_PATH Management  . . . . .   5
       2.2.3.  MULTI_EXIT_DISC Attribute . . . . . . . . . . . . . .   5
       2.2.4.  Communities Attributes  . . . . . . . . . . . . . . .   5
     2.3.  Per-Client Policy Control in Multilateral Interconnection   6
       2.3.1.  Path Hiding on a Route Server . . . . . . . . . . . .   6
       2.3.2.  Mitigation of Path Hiding . . . . . . . . . . . . . .   7
         2.3.2.1.  Multiple Route Server RIBs  . . . . . . . . . . .   7
         2.3.2.2.  Advertising Multiple Paths  . . . . . . . . . . .   8
       2.3.3.  Implementation Suggestions  . . . . . . . . . . . . .   9
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   4.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     4.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     4.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

Jasinska, et al.             Standards Track                    [Page 2]
RFC 7947                  IXP BGP Route Server            September 2016

1.  Introduction to Multilateral Interconnection

   Internet Exchange Points (IXPs) provide IP data interconnection
   facilities for their participants, typically using shared Layer 2
   networking media such as Ethernet.  The Border Gateway Protocol (BGP)
   [RFC4271], an inter-Autonomous System (inter-AS) routing protocol, is
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