draft-ietf-ospf-te-link-attr-reuse-13.txt		draft-ietf-ospf-te-link-attr-reuse-14.txt
	LSR Working Group P. Psenak, Ed.		LSR Working Group P. Psenak, Ed.
	Internet-Draft L. Ginsberg		Internet-Draft L. Ginsberg
	Intended status: Standards Track Cisco Systems		Intended status: Standards Track Cisco Systems
	Expires: December 7, 2020 W. Henderickx		Expires: December 9, 2020 W. Henderickx
	Nokia		Nokia
	J. Tantsura		J. Tantsura
	Apstra		Apstra
	J. Drake		J. Drake
	Juniper Networks		Juniper Networks
	June 5, 2020		June 7, 2020
	OSPF Link Traffic Engineering Attribute Reuse		OSPF Link Traffic Engineering Attribute Reuse
	draft-ietf-ospf-te-link-attr-reuse-13.txt		draft-ietf-ospf-te-link-attr-reuse-14.txt
	Abstract		Abstract
	Existing traffic engineering related link attribute advertisements		Existing traffic engineering related link attribute advertisements
	have been defined and are used in RSVP-TE deployments. Since the		have been defined and are used in RSVP-TE deployments. Since the
	original RSVP-TE use case was defined, additional applications (e.g.,		original RSVP-TE use case was defined, additional applications (e.g.,
	Segment Routing Traffic Engineering, Loop Free Alternate) have been		Segment Routing Traffic Engineering, Loop Free Alternate) have been
	defined which also make use of the link attribute advertisements. In		defined which also make use of the link attribute advertisements. In
	cases where multiple applications wish to make use of these link		cases where multiple applications wish to make use of these link
	attributes the current advertisements do not support application		attributes the current advertisements do not support application
	skipping to change at page 1, line 46 ¶		skipping to change at page 1, line 46 ¶
	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 December 7, 2020.		This Internet-Draft will expire on December 9, 2020.
	Copyright Notice		Copyright Notice
	Copyright (c) 2020 IETF Trust and the persons identified as the		Copyright (c) 2020 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 5, line 36 ¶		skipping to change at page 5, line 36 ¶
	have been originally defined for RSVP-TE applications (See		have been originally defined for RSVP-TE applications (See
	Section 6).		Section 6).
	TE link attributes used for RSVP-TE/GMPLS continue to use OSPFv2 TE		TE link attributes used for RSVP-TE/GMPLS continue to use OSPFv2 TE
	Opaque LSA [RFC3630] and OSPFv3 Intra-Area-TE-LSA [RFC5329].		Opaque LSA [RFC3630] and OSPFv3 Intra-Area-TE-LSA [RFC5329].
	The format of the link attribute TLVs that have been defined for		The format of the link attribute TLVs that have been defined for
	RSVP-TE applications will be kept unchanged even when they are used		RSVP-TE applications will be kept unchanged even when they are used
	for non-RSVP-TE applications. Unique code points are allocated for		for non-RSVP-TE applications. Unique code points are allocated for
	these link attribute TLVs from the OSPFv2 Extended Link TLV Sub-TLV		these link attribute TLVs from the OSPFv2 Extended Link TLV Sub-TLV
	Registry [RFC7684] and from the OSPFv3 Extended LSA Sub-TLV Registry		Registry [RFC7684] and from the OSPFv3 Extended-LSA Sub-TLV Registry
	[RFC8362], as specified in Section 14.		[RFC8362], as specified in Section 14.
	5. Advertisement of Application Specific Values		5. Advertisement of Application Specific Values
	To allow advertisement of the application specific values of the link		To allow advertisement of the application specific values of the link
	attribute, a new Application Specific Link Attributes (ASLA) sub-TLV		attribute, a new Application Specific Link Attributes (ASLA) sub-TLV
	is defined. The ASLA sub-TLV is a sub-TLV of the OSPFv2 Extended		is defined. The ASLA sub-TLV is a sub-TLV of the OSPFv2 Extended
	Link TLV [RFC7684] and OSPFv3 Router-Link TLV [RFC8362].		Link TLV [RFC7684] and OSPFv3 Router-Link TLV [RFC8362].
	On top of advertising the link attributes for standardized		On top of advertising the link attributes for standardized
	skipping to change at page 8, line 33 ¶		skipping to change at page 8, line 33 ¶
	- Administrative Group [RFC3630]		- Administrative Group [RFC3630]
	- Extended Administrative Group [RFC7308]		- Extended Administrative Group [RFC7308]
	- TE Metric [RFC3630]		- TE Metric [RFC3630]
	6. Reused TE link attributes		6. Reused TE link attributes
	This section defines the use case and indicates the code points		This section defines the use case and indicates the code points
	(Section 14) from the OSPFv2 Extended Link TLV Sub-TLV Registry and		(Section 14) from the OSPFv2 Extended Link TLV Sub-TLV Registry and
	OSPFv3 Extended LSA Sub-TLV Registry for some of the link attributes		OSPFv3 Extended-LSA Sub-TLV Registry for some of the link attributes
	that have been originally defined for RSVP-TE or GMPLS.		that have been originally defined for RSVP-TE or GMPLS.
	6.1. Shared Risk Link Group (SRLG)		6.1. Shared Risk Link Group (SRLG)
	The SRLG of a link can be used in OSPF calculated IPFRR [RFC5714] to		The SRLG of a link can be used in OSPF calculated IPFRR [RFC5714] to
	compute a backup path that does not share any SRLG group with the		compute a backup path that does not share any SRLG group with the
	protected link.		protected link.
	To advertise the SRLG of the link in the OSPFv2 Extended Link TLV,		To advertise the SRLG of the link in the OSPFv2 Extended Link TLV,
	the same format for the sub-TLV defined in section 1.3 of [RFC4203]		the same format for the sub-TLV defined in section 1.3 of [RFC4203]
	skipping to change at page 9, line 25 ¶		skipping to change at page 9, line 25 ¶
	14 - Unidirectional Delay Variation		14 - Unidirectional Delay Variation
	15 - Unidirectional Link Loss		15 - Unidirectional Link Loss
	16 - Unidirectional Residual Bandwidth		16 - Unidirectional Residual Bandwidth
	17 - Unidirectional Available Bandwidth		17 - Unidirectional Available Bandwidth
	18 - Unidirectional Utilized Bandwidth		18 - Unidirectional Utilized Bandwidth
	To advertise extended link metrics in the OSPFv3 Extended LSA Router-		To advertise extended link metrics in the OSPFv3 Extended-LSA Router-
	Link TLV, the same format for the sub-TLVs defined in [RFC7471] is		Link TLV, the same format for the sub-TLVs defined in [RFC7471] is
	used with the following TLV types:		used with the following TLV types:
	13 - Unidirectional Link Delay		13 - Unidirectional Link Delay
	14 - Min/Max Unidirectional Link Delay		14 - Min/Max Unidirectional Link Delay
	15 - Unidirectional Delay Variation		15 - Unidirectional Delay Variation
	16 - Unidirectional Link Loss		16 - Unidirectional Link Loss
	skipping to change at page 16, line 27 ¶		skipping to change at page 16, line 27 ¶
	with (for example) [RFC3630]. As the advertisements defined in this		with (for example) [RFC3630]. As the advertisements defined in this
	document limit the scope to specific applications, the impact of		document limit the scope to specific applications, the impact of
	tampering is similarly limited in scope.		tampering is similarly limited in scope.
	14. IANA Considerations		14. IANA Considerations
	This specifications updates two existing registries:		This specifications updates two existing registries:
	- OSPFv2 Extended Link TLV Sub-TLVs Registry		- OSPFv2 Extended Link TLV Sub-TLVs Registry
	- OSPFv3 Extended LSA Sub-TLV Registry		- OSPFv3 Extended-LSA Sub-TLV Registry
	New values are allocated using the IETF Review procedure as described		New values are allocated using the IETF Review procedure as described
	in [RFC5226].		in [RFC5226].
	14.1. OSPFv2		14.1. OSPFv2
	The OSPFv2 Extended Link TLV Sub-TLVs Registry [RFC7684] defines sub-		The OSPFv2 Extended Link TLV Sub-TLVs Registry [RFC7684] defines sub-
	TLVs at any level of nesting for OSPFv2 Extended Link TLVs. IANA has		TLVs at any level of nesting for OSPFv2 Extended Link TLVs. IANA has
	assigned the following Sub-TLV types from the OSPFv2 Extended Link		assigned the following Sub-TLV types from the OSPFv2 Extended Link
	TLV Sub-TLVs Registry:		TLV Sub-TLVs Registry:
	skipping to change at page 17, line 18 ¶		skipping to change at page 17, line 18 ¶
	19 - Administrative Group		19 - Administrative Group
	20 - Extended Administrative Group		20 - Extended Administrative Group
	22 - TE Metric		22 - TE Metric
	23 - Maximum Link Bandwidth		23 - Maximum Link Bandwidth
	14.2. OSPFv3		14.2. OSPFv3
	The OSPFv3 Extended LSA Sub-TLV Registry [RFC8362] defines sub-TLVs		The OSPFv3 Extended-LSA Sub-TLV Registry [RFC8362] defines sub-TLVs
	at any level of nesting for OSPFv3 Extended LSAs. IANA has assigned		at any level of nesting for OSPFv3 Extended LSAs. IANA has assigned
	the following Sub-TLV types from the OSPFv3 Extended LSA Sub-TLV		the following Sub-TLV types from the OSPFv3 Extended-LSA Sub-TLV
	Registry:		Registry:
	11 - Application Specific Link Attributes		11 - Application Specific Link Attributes
	12 - Shared Risk Link Group		12 - Shared Risk Link Group
	13 - Unidirectional Link Delay		13 - Unidirectional Link Delay
	14 - Min/Max Unidirectional Link Delay		14 - Min/Max Unidirectional Link Delay
	15 - Unidirectional Delay Variation		15 - Unidirectional Delay Variation
	16 - Unidirectional Link Loss		16 - Unidirectional Link Loss
	16 - Unidirectional Residual Bandwidth		17 - Unidirectional Residual Bandwidth
	18 - Unidirectional Available Bandwidth		18 - Unidirectional Available Bandwidth
	19 - Unidirectional Utilized Bandwidth		19 - Unidirectional Utilized Bandwidth
	20 - Administrative Group		20 - Administrative Group
	21 - Extended Administrative Group		21 - Extended Administrative Group
	22 - TE Metric		22 - TE Metric
End of changes. 11 change blocks.
	11 lines changed or deleted		11 lines changed or added
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