Enhanced Route Refresh Capability for BGP-4
RFC 7313

 
Document
Type RFC - Proposed Standard (July 2014; No errata)
Updates RFC 2918
Last updated 2014-07-22
Replaces draft-keyur-bgp-enhanced-route-refresh
Stream IETF
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Stream
WG state Submitted to IESG for Publication
Consensus Yes
Document shepherd Susan Hares
Shepherd write-up Show (last changed 2014-03-20)
IESG
IESG state RFC 7313 (Proposed Standard)
Telechat date
Responsible AD Alia Atlas
Send notices to idr-chairs@ietf.org, draft-ietf-idr-bgp-enhanced-route-refresh@ietf.org
IANA
IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack

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Internet Engineering Task Force (IETF)                          K. Patel
Request for Comments: 7313                                       E. Chen
Updates: 2918                                              Cisco Systems
Category: Standards Track                           B. Venkatachalapathy
ISSN: 2070-1721                                                July 2014

              Enhanced Route Refresh Capability for BGP-4

Abstract

   In this document, we enhance the existing BGP route refresh
   mechanisms to provide for the demarcation of the beginning and the
   ending of a route refresh.  The enhancement can be used to facilitate
   correction of BGP Routing Information Base (RIB) inconsistencies in a
   non-disruptive manner.  This document updates RFC 2918.

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 5741.

   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/rfc7313.

Copyright Notice

   Copyright (c) 2014 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.

Patel, et al.                Standards Track                    [Page 1]
RFC 7313       Enhanced Route Refresh Capability for BGP-4     July 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Protocol Extensions . . . . . . . . . . . . . . . . . . . . .   2
     3.1.  Enhanced Route Refresh Capability . . . . . . . . . . . .   3
     3.2.  Subtypes for ROUTE-REFRESH Message  . . . . . . . . . . .   3
   4.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   It is sometimes necessary to perform routing consistency validations
   such as checking for possible missing route withdrawals between BGP
   speakers [RFC4271].  Currently, such validations typically involve
   offline, manual operations that can be tedious and time-consuming.

   In this document, we enhance the existing BGP route refresh
   mechanisms [RFC2918] to provide for the demarcation of the beginning
   and the ending of a route refresh (which refers to the complete
   re-advertisement of the Adj-RIB-Out to a peer, subject to routing
   policies).  The enhancement can be used to facilitate online, non-
   disruptive consistency validation of BGP routing updates.

   This document updates [RFC2918] by redefining a field in the ROUTE-
   REFRESH message that was previously designated as Reserved.

2.  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 [RFC2119] only when
   they appear in all upper case.  They may also appear in lower or
   mixed case as English words, without any normative meaning.

3.  Protocol Extensions

   The BGP protocol extensions introduced in this document include the
   definition of a new BGP capability, named "Enhanced Route Refresh
   Capability", and the specification of the message subtypes for the
   ROUTE-REFRESH message.

Patel, et al.                Standards Track                    [Page 2]
RFC 7313       Enhanced Route Refresh Capability for BGP-4     July 2014
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