draft-ietf-bfd-optimizing-authentication-06.txt		draft-ietf-bfd-optimizing-authentication-07.txt
	Network Working Group M. Jethanandani		Network Working Group M. Jethanandani
	Internet-Draft VMware		Internet-Draft VMware
	Intended status: Standards Track A. Mishra		Intended status: Standards Track A. Mishra
	Expires: April 14, 2019 SES Networks		Expires: May 15, 2019 SES Networks
	A. Saxena		A. Saxena
	Ciena Corporation		Ciena Corporation
	M. Bhatia		M. Bhatia
	Nokia		Nokia
	October 11, 2018		November 11, 2018
	Optimizing BFD Authentication		Optimizing BFD Authentication
	draft-ietf-bfd-optimizing-authentication-06		draft-ietf-bfd-optimizing-authentication-07
	Abstract		Abstract
	This document describes an optimization to BFD Authentication as		This document describes an optimization to BFD Authentication as
	described in Section 6.7 of BFD RFC5880.		described in Section 6.7 of BFD RFC5880.
	Requirements Language		Requirements Language
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this		"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
	skipping to change at page 1, line 44 ¶		skipping to change at page 1, line 44 ¶
	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 https://datatracker.ietf.org/drafts/current/.		Drafts is at https://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 April 14, 2019.		This Internet-Draft will expire on May 15, 2019.
	Copyright Notice		Copyright Notice
	Copyright (c) 2018 IETF Trust and the persons identified as the		Copyright (c) 2018 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
	(https://trustee.ietf.org/license-info) in effect on the date of		(https://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 42 ¶		skipping to change at page 4, line 42 ¶
	logic for sequence number maintenance remains unchanged from		logic for sequence number maintenance remains unchanged from
	[RFC5880]. If at a later time, a different scheme is adopted for		[RFC5880]. If at a later time, a different scheme is adopted for
	changing sequence number, this method can use the updated scheme		changing sequence number, this method can use the updated scheme
	without any impact.		without any impact.
	Most frames transmitted on a BFD session are BFD CC UP frames.		Most frames transmitted on a BFD session are BFD CC UP frames.
	Authenticating a small subset of these frames, for example, a detect		Authenticating a small subset of these frames, for example, a detect
	multiplier number of packets per configured period, significantly		multiplier number of packets per configured period, significantly
	reduces the computational demand for the system while maintaining		reduces the computational demand for the system while maintaining
	security of the session across the configured authentication periods.		security of the session across the configured authentication periods.
	The configuration of the periodic authentication interval for BFD CC		A minimum of Detect Multiplier packets MUST be transmitted per
	UP frames is an open issue, left for implementations to decide.		configured periodic authentication interval. This ensures that the
			BFD session should see at least one authenticated packet during that
			interval.
	3. NULL Auth TLV		3. NULL Auth TLV
	This section describes a new Authentication TLV as:		This section describes a new Authentication TLV as:
	0 1 2 3		0 1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Auth Type | Auth Len | Auth Key ID | Reserved |		| Auth Type | Auth Len | Auth Key ID | Reserved |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
End of changes. 5 change blocks.
	6 lines changed or deleted		8 lines changed or added
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