draft-ietf-grow-bgp-session-culling-01.txt		draft-ietf-grow-bgp-session-culling-02.txt
	Global Routing Operations W. Hargrave		Global Routing Operations W. Hargrave
	Internet-Draft LONAP		Internet-Draft LONAP
	Intended status: Best Current Practice M. Griswold		Intended status: Best Current Practice M. Griswold
	Expires: October 7, 2017 20C		Expires: January 4, 2018 20C
	J. Snijders		J. Snijders
	NTT		NTT
	N. Hilliard		N. Hilliard
	INEX		INEX
	April 5, 2017		July 3, 2017
	Mitigating Negative Impact of Maintenance through BGP Session Culling		Mitigating Negative Impact of Maintenance through BGP Session Culling
	draft-ietf-grow-bgp-session-culling-01		draft-ietf-grow-bgp-session-culling-02
	Abstract		Abstract
	This document outlines an approach to mitigate negative impact on		This document outlines an approach to mitigate negative impact on
	networks resulting from maintenance activities. It includes guidance		networks resulting from maintenance activities. It includes guidance
	for both IP networks and Internet Exchange Points (IXPs). The		for both IP networks and Internet Exchange Points (IXPs). The
	approach is to ensure BGP-4 sessions affected by the maintenance are		approach is to ensure BGP-4 sessions affected by the maintenance are
	forcefully torn down before the actual maintenance activities		forcefully torn down before the actual maintenance activities
	commence.		commence.
	skipping to change at page 1, line 40 ¶		skipping to change at page 1, line 40 ¶
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at http://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on October 7, 2017.		This Internet-Draft will expire on January 4, 2018.
	Copyright Notice		Copyright Notice
	Copyright (c) 2017 IETF Trust and the persons identified as the		Copyright (c) 2017 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 4, line 12 ¶		skipping to change at page 4, line 12 ¶
	between the Administrative Shutdown and the impacting maintenance		between the Administrative Shutdown and the impacting maintenance
	activities is warranted.		activities is warranted.
	After the maintenance activities have concluded, the operator is		After the maintenance activities have concluded, the operator is
	expected to restore the BGP sessions to their original Administrative		expected to restore the BGP sessions to their original Administrative
	state.		state.
	3.1.1. Maintenance Considerations		3.1.1. Maintenance Considerations
	Initiators of the Administrative Shutdown could consider to use		Initiators of the Administrative Shutdown could consider to use
	[Graceful Shutdown] to facilitate smooth drainage of traffic prior to		Graceful Shutdown [I-D.ietf-grow-bgp-gshut] to facilitate smooth
	session tear down, and the Shutdown Communication		drainage of traffic prior to session tear down, and the Shutdown
	[I-D.ietf-idr-shutdown] to inform the remote side on the nature and		Communication [I-D.ietf-idr-shutdown] to inform the remote side on
	duration of the maintenance activities.		the nature and duration of the maintenance activities.
	3.2. Involuntary BGP Session Teardown Recommendations		3.2. Involuntary BGP Session Teardown Recommendations
	In the case where multilateral interconnection between BGP speakers		In the case where multilateral interconnection between BGP speakers
	is facilitated through a switched layer-2 fabric, such as commonly		is facilitated through a switched layer-2 fabric, such as commonly
	seen at Internet Exchange Points (IXPs), different operational		seen at Internet Exchange Points (IXPs), different operational
	considerations can apply.		considerations can apply.
	Operational experience shows many network operators are unable to		Operational experience shows many network operators are unable to
	carry out the Voluntary BGP Session Teardown recommendations, because		carry out the Voluntary BGP Session Teardown recommendations, because
	skipping to change at page 6, line 49 ¶		skipping to change at page 6, line 49 ¶
	DOI 10.17487/RFC2119, March 1997,		DOI 10.17487/RFC2119, March 1997,
	<http://www.rfc-editor.org/info/rfc2119>.		<http://www.rfc-editor.org/info/rfc2119>.
	[RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A		[RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A
	Border Gateway Protocol 4 (BGP-4)", RFC 4271,		Border Gateway Protocol 4 (BGP-4)", RFC 4271,
	DOI 10.17487/RFC4271, January 2006,		DOI 10.17487/RFC4271, January 2006,
	<http://www.rfc-editor.org/info/rfc4271>.		<http://www.rfc-editor.org/info/rfc4271>.
	7.2. Informative References		7.2. Informative References
			[I-D.ietf-grow-bgp-gshut]
			Francois, P., Decraene, B., Pelsser, C., Patel, K., and C.
			Filsfils, "Graceful BGP session shutdown", draft-ietf-
			grow-bgp-gshut-09 (work in progress), June 2017.
	[I-D.ietf-idr-shutdown]		[I-D.ietf-idr-shutdown]
	Snijders, J., Heitz, J., and J. Scudder, "BGP		Snijders, J., Heitz, J., and J. Scudder, "BGP
	Administrative Shutdown Communication", draft-ietf-idr-		Administrative Shutdown Communication", draft-ietf-idr-
	shutdown-07 (work in progress), March 2017.		shutdown-10 (work in progress), June 2017.
	[I-D.ietf-rtgwg-bgp-pic]		[I-D.ietf-rtgwg-bgp-pic]
	Bashandy, A., Filsfils, C., and P. Mohapatra, "BGP Prefix		Bashandy, A., Filsfils, C., and P. Mohapatra, "BGP Prefix
	Independent Convergence", draft-ietf-rtgwg-bgp-pic-01		Independent Convergence", draft-ietf-rtgwg-bgp-pic-05
	(work in progress), June 2016.		(work in progress), May 2017.
	7.3. URIs		7.3. URIs
	[1] https://github.com/bgp/bgp-session-culling-config-examples		[1] https://github.com/bgp/bgp-session-culling-config-examples
	Appendix A. Example packet filters		Appendix A. Example packet filters
	Example packet filters for "Involuntary BGP Session Teardown" at an		Example packet filters for "Involuntary BGP Session Teardown" at an
	IXP with LAN prefixes 192.0.2.0/24 and 2001:db8:2::/64.		IXP with LAN prefixes 192.0.2.0/24 and 2001:db8:2::/64.
End of changes. 8 change blocks.
	11 lines changed or deleted		16 lines changed or added
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