Mitigating Negative Impact of Maintenance through BGP Session Culling
draft-iops-grow-bgp-session-culling-01

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Global Routing Operations                                    W. Hargrave
Internet-Draft                                                     LONAP
Intended status: Best Current Practice                       M. Griswold
Expires: September 28, 2017                                          20C
                                                             J. Snijders
                                                                     NTT
                                                             N. Hilliard
                                                                    INEX
                                                          March 27, 2017

 Mitigating Negative Impact of Maintenance through BGP Session Culling
                 draft-iops-grow-bgp-session-culling-01

Abstract

   This document outlines an approach to mitigate negative impact on
   networks resulting from maintenance activities.  It includes guidance
   for both IP networks and Internet Exchange Points (IXPs).  The
   approach is to ensure BGP-4 sessions affected by the maintenance are
   forcefully torn down before the actual maintenance activities
   commence.

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 September 28, 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

Hargrave, et al.       Expires September 28, 2017               [Page 1]
Internet-Draft             BGP Session Culling                March 2017

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  BGP Session Culling . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Voluntary BGP Session Teardown Recommendations  . . . . .   3
       3.1.1.  Maintenance Considerations  . . . . . . . . . . . . .   4
     3.2.  Involuntary BGP Session Teardown Recommendations  . . . .   4
       3.2.1.  Packet Filter Considerations  . . . . . . . . . . . .   4
       3.2.2.  Hardware Considerations . . . . . . . . . . . . . . .   5
     3.3.  Procedural Considerations . . . . . . . . . . . . . . . .   6
   4.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Appendix A.  Example packet filters . . . . . . . . . . . . . . .   7
     A.1.  Cisco IOS, IOS XR & Arista EOS Firewall Example
           Configuration . . . . . . . . . . . . . . . . . . . . . .   7
     A.2.  Nokia SR OS Filter Example Configuration  . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   BGP Session Culling is the practice of ensuring BGP sessions are
   forcefully torn down before maintenance activities on a lower layer
   network commence, which otherwise would affect the flow of data
   between the BGP speakers.

   BGP Session Culling ensures that lower layer network maintenance
   activities cause the minimum possible amount of disruption, by
   causing BGP speakers to preemptively gracefully converge onto
   alternative paths while the lower layer network's forwarding plane
   remains fully operational.

   The grace period required for a successful application of BGP Session
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