draft-ietf-mpls-rfc8287-len-clarification-01.txt		draft-ietf-mpls-rfc8287-len-clarification-02.txt
	Network Work group N. Nainar		Network Work group N. Nainar
	Internet-Draft C. Pignataro		Internet-Draft C. Pignataro
	Updates: 8287 (if approved) Cisco Systems, Inc.		Updates: 8287 (if approved) Cisco Systems, Inc.
	Intended status: Standards Track F. Iqbal		Intended status: Standards Track F. Iqbal
	Expires: November 26, 2019 Individual		Expires: December 2, 2019 Individual
	A. Vainshtein		A. Vainshtein
	ECI Telecom		ECI Telecom
	May 25, 2019		May 31, 2019
	RFC8287 Sub-TLV Length Clarification		RFC8287 Sub-TLV Length Clarification
	draft-ietf-mpls-rfc8287-len-clarification-01		draft-ietf-mpls-rfc8287-len-clarification-02
	Abstract		Abstract
	RFC8287 defines the extensions to MPLS LSP Ping and Traceroute for		RFC8287 defines the extensions to MPLS LSP Ping and Traceroute for
	Segment Routing IGP-Prefix and IGP-Adjacency Segment Identifier		Segment Routing IGP-Prefix and IGP-Adjacency Segment Identifier
	(SIDs) with an MPLS data plane. RFC8287 proposes 3 Target FEC Stack		(SIDs) with an MPLS data plane. RFC8287 proposes 3 Target FEC Stack
	Sub-TLVs. While the standard defines the format and procedure to		Sub-TLVs. While the standard defines the format and procedure to
	handle those Sub-TLVs, it does not sufficiently clarify how the		handle those Sub-TLVs, it does not sufficiently clarify how the
	length of the Segment ID Sub-TLVs should be computed to include in		length of the Segment ID Sub-TLVs should be computed to include in
	the Length field of the Sub-TLVs which may result in interoperability		the Length field of the Sub-TLVs which may result in interoperability
	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 November 26, 2019.		This Internet-Draft will expire on December 2, 2019.
	Copyright Notice		Copyright Notice
	Copyright (c) 2019 IETF Trust and the persons identified as the		Copyright (c) 2019 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 26 ¶		skipping to change at page 4, line 26 ¶
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	4.3. IGP-Adjacency Segment ID Sub-TLV		4.3. IGP-Adjacency Segment ID Sub-TLV
	The Sub-TLV length for IGP-Adjacency Segment ID varies depending on		The Sub-TLV length for IGP-Adjacency Segment ID varies depending on
	the Adjacency Type and Protocol. In any of the allowed combination		the Adjacency Type and Protocol. In any of the allowed combination
	of Adjacency Type and Protocol, the sub-TLV length MUST be calculated		of Adjacency Type and Protocol, the sub-TLV length MUST be calculated
	by including 2 octets of Reserved field. Below is a table that list		by including 2 octets of Reserved field. Below is a table that list
	the length for different combinations.		the length for different combinations.
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Protocol | Length for Adj.Type |		| Protocol | Length for Adj.Type |
	+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| | Parallel | IPv4 | IPv6 |		| | Parallel | IPv4 | IPv6 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| OSPF | 20 | 20 | 44 |		| OSPF | 20 | 20 | 44 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| ISIS | 24 | 24 | 48 |		| ISIS | 24 | 24 | 48 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Any | 20 | 20 | 44 |		| Any | 20 | 20 | 44 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	For example, when the Adj. Type is set to Parallel Adjacency and the		For example, when the Adj. Type is set to Parallel Adjacency and the
	Protocol is set to 0, the Sub-TLV will be as below:		Protocol is set to 0, the Sub-TLV will be as below:
	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
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|Type = 36 (IGP-Adjacency SID) | Length = 20 |		|Type = 36 (IGP-Adjacency SID) | Length = 20 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Adj. Type = 1 | Protocol =0 | Reserved |		| Adj. Type = 1 | Protocol =0 | Reserved |
End of changes. 5 change blocks.
	15 lines changed or deleted		15 lines changed or added
This html diff was produced by rfcdiff 1.47. The latest version is available from http://tools.ietf.org/tools/rfcdiff/