< draft-ietf-ospf-ospfv3-lsa-extend-04.txt		draft-ietf-ospf-ospfv3-lsa-extend-05.txt >
	Network Working Group A. Lindem		Network Working Group A. Lindem
	Internet-Draft S. Mirtorabi		Internet-Draft S. Mirtorabi
	Intended status: Standards Track A. Roy		Intended status: Standards Track A. Roy
	Expires: March 22, 2015 F. Baker		Expires: May 28, 2015 F. Baker
	Cisco Systems		Cisco Systems
	September 18, 2014		November 24, 2014
	OSPFv3 LSA Extendibility		OSPFv3 LSA Extendibility
	draft-ietf-ospf-ospfv3-lsa-extend-04.txt		draft-ietf-ospf-ospfv3-lsa-extend-05.txt
	Abstract		Abstract
	OSPFv3 requires functional extension beyond what can readily be done		OSPFv3 requires functional extension beyond what can readily be done
	with the fixed-format Link State Advertisement (LSA) as described in		with the fixed-format Link State Advertisement (LSA) as described in
	RFC 5340. Without LSA extension, attributes associated with OSPFv3		RFC 5340. Without LSA extension, attributes associated with OSPFv3
	links and advertised IPv6 prefixes must be advertised in separate		links and advertised IPv6 prefixes must be advertised in separate
	LSAs and correlated to the fixed-format LSAs. This document extends		LSAs and correlated to the fixed-format LSAs. This document extends
	the LSA format by encoding the existing OSPFv3 LSA information in		the LSA format by encoding the existing OSPFv3 LSA information in
	Type-Length-Value (TLV) tuples and allowing advertisement of		Type-Length-Value (TLV) tuples and allowing advertisement of
	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 March 22, 2015.		This Internet-Draft will expire on May 28, 2015.
	Copyright Notice		Copyright Notice
	Copyright (c) 2014 IETF Trust and the persons identified as the		Copyright (c) 2014 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 16 ¶		skipping to change at page 4, line 16 ¶
	Przygienda for review of the draft versions and discussions of		Przygienda for review of the draft versions and discussions of
	backward compatibility.		backward compatibility.
	Thanks to Alan Davey for review and comments including the suggestion		Thanks to Alan Davey for review and comments including the suggestion
	to separate the extended LSA TLV definitions from the extended LSAs		to separate the extended LSA TLV definitions from the extended LSAs
	definitions.		definitions.
	Thanks to David Lamparter for review and suggestions on backward		Thanks to David Lamparter for review and suggestions on backward
	compatibility.		compatibility.
			Thanks to Karsten Thomann for review and editorial comments.
	The RFC text was produced using Marshall Rose's xml2rfc tool.		The RFC text was produced using Marshall Rose's xml2rfc tool.
	2. OSPFv3 Extended LSA Types		2. OSPFv3 Extended LSA Types
	In order to provide backward compatibility, new LSA codes must be		In order to provide backward compatibility, new LSA codes must be
	allocated. There are eight fixed-format LSAs defined in RFC 5340		allocated. There are eight fixed-format LSAs defined in RFC 5340
	[OSPFV3]. For ease of implementation and debugging, the LSA function		[OSPFV3]. For ease of implementation and debugging, the LSA function
	codes are the same as the fixed-format LSAs only with 32, i.e., 0x20,		codes are the same as the fixed-format LSAs only with 32, i.e., 0x20,
	added. The alternative to this mapping was to allocate a bit in the		added. The alternative to this mapping was to allocate a bit in the
	LS Type indicating the new LSA format. However, this would have used		LS Type indicating the new LSA format. However, this would have used
	skipping to change at page 15, line 16 ¶		skipping to change at page 15, line 16 ¶
	The IPv6 Forwarding Address TLV has identical semantics to the		The IPv6 Forwarding Address TLV has identical semantics to the
	optional forwarding address in section A.4.7 of [OSPFV3]. The IPv6		optional forwarding address in section A.4.7 of [OSPFV3]. The IPv6
	Forwarding Address TLV is applicable to the External-Prefix TLV		Forwarding Address TLV is applicable to the External-Prefix TLV
	(Section 3.5). Specification as a sub-TLV of other TLVs is not		(Section 3.5). Specification as a sub-TLV of other TLVs is not
	defined herein. The sub-TLV is optional and the first specified		defined herein. The sub-TLV is optional and the first specified
	instance is used as the Forwarding Address as defined in [OSPFV3].		instance is used as the Forwarding Address as defined in [OSPFV3].
	Instances subsequent to the first MUST be ignored.		Instances subsequent to the first MUST be ignored.
	The IPv6 Forwarding Address TLV is to be used with IPv6 address		The IPv6 Forwarding Address TLV is to be used with IPv6 address
	families as defined in [OSPFV3-AF] It will be ignored for other		families as defined in [OSPFV3-AF] It MUST be ignored for other
	address families.		address families.
	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
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| 1 - Forwarding Address | sub-TLV Length |		| 1 - Forwarding Address | sub-TLV Length |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| |		| |
	+- -+		+- -+
	| |		| |
	skipping to change at page 15, line 47 ¶		skipping to change at page 15, line 47 ¶
	The IPv4 Forwarding Address TLV has identical semantics to the		The IPv4 Forwarding Address TLV has identical semantics to the
	optional forwarding address in section A.4.7 of [OSPFV3]. The IPv4		optional forwarding address in section A.4.7 of [OSPFV3]. The IPv4
	Forwarding Address TLV is The IPv4 Forwarding Address TLV is		Forwarding Address TLV is The IPv4 Forwarding Address TLV is
	applicable to the External-Prefix TLV (Section 3.5). Specification		applicable to the External-Prefix TLV (Section 3.5). Specification
	as a sub-TLV of other TLVs is not defined herein. The sub-TLV is		as a sub-TLV of other TLVs is not defined herein. The sub-TLV is
	optional and the first specified instance is used as the Forwarding		optional and the first specified instance is used as the Forwarding
	Address as defined in [OSPFV3]. Instances subsequent to the first		Address as defined in [OSPFV3]. Instances subsequent to the first
	MUST be ignored.		MUST be ignored.
	The IPv4 Forwarding Address TLV is to be used with IPv3 address		The IPv4 Forwarding Address TLV is to be used with IPv3 address
	families as defined in [OSPFV3-AF] It will be ignored for other		families as defined in [OSPFV3-AF] It MUST be ignored for other
	address families.		address families.
	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
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| 2 - Forwarding Address | sub-TLV Length |		| 2 - Forwarding Address | sub-TLV Length |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Forwarding Address |		| Forwarding Address |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	skipping to change at page 23, line 9 ¶		skipping to change at page 23, line 9 ¶
	between the NSSA-LSA defined in section A.4.8 of [OSPFV3], and the		between the NSSA-LSA defined in section A.4.8 of [OSPFV3], and the
	AS-External-LSA. The NSSA-LSA will have type 0xA027 which implies		AS-External-LSA. The NSSA-LSA will have type 0xA027 which implies
	area flooding scope. Future requirements may dictate that supported		area flooding scope. Future requirements may dictate that supported
	TLVs differ between the E-AS-External-LSA and the E-NSSA-LSA.		TLVs differ between the E-AS-External-LSA and the E-NSSA-LSA.
	However, future requirements are beyond the scope of this document.		However, future requirements are beyond the scope of this document.
	4.7. OSPFv3 E-Link-LSA		4.7. OSPFv3 E-Link-LSA
	The E-Link-LSA has an LS Type of 0x8028 and will have the same base		The E-Link-LSA has an LS Type of 0x8028 and will have the same base
	information content as the Link-LSA defined in section A.4.9 of		information content as the Link-LSA defined in section A.4.9 of
	[OSPFV3]. However, unlike the existing Link-LFA, it is extendable		[OSPFV3]. However, unlike the existing Link-LSA, it is extendable
	and represented as TLVs.		and represented as TLVs.
	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
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| LS Age |1|0|0| 0x28 |		| LS Age |1|0|0| 0x28 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Link State ID |		| Link State ID |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Advertising Router |		| Advertising Router |
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