Graceful BGP Session Shutdown
RFC 8326
| Document | Type | RFC - Proposed Standard (March 2018; Errata) | |
|---|---|---|---|
| Authors | Pierre Francois , Bruno Decraene , Cristel Pelsser , Keyur Patel , Clarence Filsfils | ||
| Last updated | 2020-01-21 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized with errata bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Chris Morrow | ||
| Shepherd write-up | Show (last changed 2017-09-25) | ||
| IESG | IESG state | RFC 8326 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Warren Kumari | ||
| Send notices to | Christopher Morrow <christopher.morrow@gmail.com> | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) P. Francois, Ed.
Request for Comments: 8326 Individual Contributor
Category: Standards Track B. Decraene, Ed.
ISSN: 2070-1721 Orange
C. Pelsser
Strasbourg University
K. Patel
Arrcus, Inc.
C. Filsfils
Cisco Systems
March 2018
Graceful BGP Session Shutdown
Abstract
This document standardizes a new well-known BGP community,
GRACEFUL_SHUTDOWN, to signal the graceful shutdown of paths. This
document also describes operational procedures that use this
well-known community to reduce the amount of traffic lost when BGP
peering sessions are about to be shut down deliberately, e.g., for
planned maintenance.
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
https://www.rfc-editor.org/info/rfc8326.
Francois, et al. Standards Track [Page 1]
RFC 8326 Graceful BGP Session Shutdown March 2018
Copyright Notice
Copyright (c) 2018 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
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 . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Packet Loss upon Manual EBGP Session Shutdown . . . . . . . . 4
4. Procedure for EBGP Graceful Shutdown . . . . . . . . . . . . 4
4.1. Pre-configuration . . . . . . . . . . . . . . . . . . . . 5
4.2. Operations at Maintenance Time . . . . . . . . . . . . . 5
4.3. BGP Implementation Support for Graceful Shutdown . . . . 6
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6. Security Considerations . . . . . . . . . . . . . . . . . . . 6
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.1. Normative References . . . . . . . . . . . . . . . . . . 6
7.2. Informative References . . . . . . . . . . . . . . . . . 7
Appendix A. Alternative Techniques with Limited Applicability . 8
A.1. Multi-Exit Discriminator Tweaking . . . . . . . . . . . . 8
A.2. IGP Distance Poisoning . . . . . . . . . . . . . . . . . 8
Appendix B. Configuration Examples . . . . . . . . . . . . . . . 8
B.1. Cisco IOS XR . . . . . . . . . . . . . . . . . . . . . . 9
B.2. BIRD . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B.3. OpenBGPD . . . . . . . . . . . . . . . . . . . . . . . . 10
Appendix C. Beyond EBGP Graceful Shutdown . . . . . . . . . . . 10
C.1. IBGP Graceful Shutdown . . . . . . . . . . . . . . . . . 10
C.2. EBGP Session Establishment . . . . . . . . . . . . . . . 10
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
Francois, et al. Standards Track [Page 2]
RFC 8326 Graceful BGP Session Shutdown March 2018
1. Introduction
Routing changes in BGP can be caused by planned maintenance
operations. This document defines a well-known community [RFC1997],
called GRACEFUL_SHUTDOWN, for the purpose of reducing the management
overhead of gracefully shutting down BGP sessions. The well-known
community allows implementers to provide an automated graceful
shutdown mechanism that does not require any router reconfiguration
Show full document text