draft-ietf-lsr-flex-algo-03.txt		draft-ietf-lsr-flex-algo-04.txt
	Network Working Group P. Psenak, Ed.		Network Working Group P. Psenak, Ed.
	Internet-Draft Cisco Systems		Internet-Draft Cisco Systems
	Intended status: Standards Track S. Hegde		Intended status: Standards Track S. Hegde
	Expires: January 5, 2020 Juniper Networks, Inc.		Expires: March 21, 2020 Juniper Networks, Inc.
	C. Filsfils		C. Filsfils
	K. Talaulikar		K. Talaulikar
	Cisco Systems, Inc.		Cisco Systems, Inc.
	A. Gulko		A. Gulko
	Thomson Reuters		Thomson Reuters
	July 4, 2019		September 18, 2019
	IGP Flexible Algorithm		IGP Flexible Algorithm
	draft-ietf-lsr-flex-algo-03.txt		draft-ietf-lsr-flex-algo-04.txt
	Abstract		Abstract
	IGP protocols traditionally compute best paths over the network based		IGP protocols traditionally compute best paths over the network based
	on the IGP metric assigned to the links. Many network deployments		on the IGP metric assigned to the links. Many network deployments
	use RSVP-TE based or Segment Routing based Traffic Engineering to		use RSVP-TE based or Segment Routing based Traffic Engineering to
	enforce traffic over a path that is computed using different metrics		enforce traffic over a path that is computed using different metrics
	or constraints than the shortest IGP path. This document proposes a		or constraints than the shortest IGP path. This document proposes a
	solution that allows IGPs themselves to compute constraint based		solution that allows IGPs themselves to compute constraint based
	paths over the network. This document also specifies a way of using		paths over the network. This document also specifies a way of using
	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 January 5, 2020.		This Internet-Draft will expire on March 21, 2020.
	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 14, line 51 ¶		skipping to change at page 14, line 51 ¶
	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 | Length |Flex-Algorithm |		| Type | Length |Flex-Algorithm |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Metric |		| Metric |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	where:		where:
	Type: TBD, suggested value 5		Type: TBD, suggested value 6
	Length: 5 octets		Length: 5 octets
	Flex-Algorithm: Single octet value between 128 and 255 inclusive.		Flex-Algorithm: Single octet value between 128 and 255 inclusive.
	Metric: 4 octets of metric information		Metric: 4 octets of metric information
	ISIS FAPM Sub-TLV MAY appear multiple times in its parent TLV. If it		ISIS FAPM Sub-TLV MAY appear multiple times in its parent TLV. If it
	appears more then once with the same Flex-Algorithm value, the first		appears more then once with the same Flex-Algorithm value, the first
	appearance MUST be used and any subsequent ones MUST be ignored.		appearance MUST be used and any subsequent ones MUST be ignored.
	skipping to change at page 16, line 17 ¶		skipping to change at page 16, line 17 ¶
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Type | Length |		| Type | Length |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|Flex-Algorithm | Reserved |		|Flex-Algorithm | Reserved |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Metric |		| Metric |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	where:		where:
	Type: TBD, suggested value for OSPFv2 is 3, for OSPFv3 is 10		Type: TBD, suggested value for OSPFv2 is 3, for OSPFv3 is 26
	Length: 8 octets		Length: 8 octets
	Flex-Algorithm: Single octet value between 128 and 255 inclusive.		Flex-Algorithm: Single octet value between 128 and 255 inclusive.
	Reserved: Must be set to 0, ignored at reception.		Reserved: Must be set to 0, ignored at reception.
	Metric: 4 octets of metric information		Metric: 4 octets of metric information
	OSPF FAPM Sub-TLV MAY appear multiple times in its parent TLV. If it		OSPF FAPM Sub-TLV MAY appear multiple times in its parent TLV. If it
	skipping to change at page 24, line 12 ¶		skipping to change at page 24, line 12 ¶
	Description: Flexible Algorithm Definition.		Description: Flexible Algorithm Definition.
	Reference: This document (Section 5.1).		Reference: This document (Section 5.1).
	16.3.2. Sub TLVs for for TLVs 135, 235, 236, and 237		16.3.2. Sub TLVs for for TLVs 135, 235, 236, and 237
	This document makes the following registrations in the "Sub-TLVs for		This document makes the following registrations in the "Sub-TLVs for
	for TLVs 135, 235, 236, and 237" registry.		for TLVs 135, 235, 236, and 237" registry.
	Type: TBD (suggested value 5).		Type: TBD (suggested value 6).
	Description: Flex-Algorithm Prefix Metric.		Description: Flex-Algorithm Prefix Metric.
	Reference: This document (Section 8).		Reference: This document (Section 8).
	16.3.3. Sub-Sub-TLVs for Flexible Algorithm Definition Sub-TLV		16.3.3. Sub-Sub-TLVs for Flexible Algorithm Definition Sub-TLV
	This document creates the following Sub-Sub-TLV Registry:		This document creates the following Sub-Sub-TLV Registry:
	Registry: Sub-Sub-TLVs for Flexible Algorithm Definition Sub-TLV		Registry: Sub-Sub-TLVs for Flexible Algorithm Definition Sub-TLV
	skipping to change at page 25, line 31 ¶		skipping to change at page 25, line 31 ¶
	Description: Flex-Algorithm Prefix Metric.		Description: Flex-Algorithm Prefix Metric.
	Reference: This document (Section 9).		Reference: This document (Section 9).
	16.4.3. OSPFv3 Extended-LSA Sub-TLVs		16.4.3. OSPFv3 Extended-LSA Sub-TLVs
	This document makes the following registrations in the "OSPFv3		This document makes the following registrations in the "OSPFv3
	Extended-LSA Sub-TLVs" registry.		Extended-LSA Sub-TLVs" registry.
	Type: TBD (suggested value 10).		Type: TBD (suggested value 26).
	Description: Flex-Algorithm Prefix Metric.		Description: Flex-Algorithm Prefix Metric.
	Reference: This document (Section 9).		Reference: This document (Section 9).
	16.4.4. OSPF Flexible Algorithm Definition TLV Sub-TLV Registry		16.4.4. OSPF Flexible Algorithm Definition TLV Sub-TLV Registry
	This document creates the following registry:		This document creates the following registry:
	Registry: OSPF Flexible Algorithm Definition TLV sub-TLV		Registry: OSPF Flexible Algorithm Definition TLV sub-TLV
	skipping to change at page 27, line 24 ¶		skipping to change at page 27, line 24 ¶
	Segment Routing", draft-ietf-isis-segment-routing-		Segment Routing", draft-ietf-isis-segment-routing-
	extensions-25 (work in progress), May 2019.		extensions-25 (work in progress), May 2019.
	[I-D.ietf-isis-te-app]		[I-D.ietf-isis-te-app]
	Ginsberg, L., Psenak, P., Previdi, S., Henderickx, W., and		Ginsberg, L., Psenak, P., Previdi, S., Henderickx, W., and
	J. Drake, "IS-IS TE Attributes per application", draft-		J. Drake, "IS-IS TE Attributes per application", draft-
	ietf-isis-te-app-06 (work in progress), April 2019.		ietf-isis-te-app-06 (work in progress), April 2019.
	[I-D.ietf-lsr-isis-srv6-extensions]		[I-D.ietf-lsr-isis-srv6-extensions]
	Psenak, P., Filsfils, C., Bashandy, A., Decraene, B., and		Psenak, P., Filsfils, C., Bashandy, A., Decraene, B., and
	Z. Hu, "IS-IS Extensions to Support Routing over IPv6		Z. Hu, "IS-IS Extension to Support Segment Routing over
	Dataplane", draft-ietf-lsr-isis-srv6-extensions-00 (work		IPv6 Dataplane", draft-ietf-lsr-isis-srv6-extensions-02
	in progress), May 2019.		(work in progress), July 2019.
	[I-D.ietf-ospf-ospfv3-segment-routing-extensions]		[I-D.ietf-ospf-ospfv3-segment-routing-extensions]
	Psenak, P. and S. Previdi, "OSPFv3 Extensions for Segment		Psenak, P. and S. Previdi, "OSPFv3 Extensions for Segment
	Routing", draft-ietf-ospf-ospfv3-segment-routing-		Routing", draft-ietf-ospf-ospfv3-segment-routing-
	extensions-23 (work in progress), January 2019.		extensions-23 (work in progress), January 2019.
	[I-D.ietf-ospf-segment-routing-extensions]		[I-D.ietf-ospf-segment-routing-extensions]
	Psenak, P., Previdi, S., Filsfils, C., Gredler, H.,		Psenak, P., Previdi, S., Filsfils, C., Gredler, H.,
	Shakir, R., Henderickx, W., and J. Tantsura, "OSPF		Shakir, R., Henderickx, W., and J. Tantsura, "OSPF
	Extensions for Segment Routing", draft-ietf-ospf-segment-		Extensions for Segment Routing", draft-ietf-ospf-segment-
	routing-extensions-27 (work in progress), December 2018.		routing-extensions-27 (work in progress), December 2018.
	[I-D.ietf-ospf-te-link-attr-reuse]		[I-D.ietf-ospf-te-link-attr-reuse]
	Psenak, P., Ginsberg, L., Henderickx, W., Tantsura, J.,		Psenak, P., Ginsberg, L., Henderickx, W., Tantsura, J.,
	and J. Drake, "OSPF Link Traffic Engineering (TE)		and J. Drake, "OSPF Link Traffic Engineering (TE)
	Attribute Reuse", draft-ietf-ospf-te-link-attr-reuse-07		Attribute Reuse", draft-ietf-ospf-te-link-attr-reuse-08
	(work in progress), April 2019.		(work in progress), August 2019.
	[I-D.li-ospf-ospfv3-srv6-extensions]		[I-D.li-ospf-ospfv3-srv6-extensions]
	Li, Z., Hu, Z., Cheng, D., Talaulikar, K., and P. Psenak,		Li, Z., Hu, Z., Cheng, D., Talaulikar, K., and P. Psenak,
	"OSPFv3 Extensions for SRv6", draft-li-ospf-		"OSPFv3 Extensions for SRv6", draft-li-ospf-
	ospfv3-srv6-extensions-03 (work in progress), March 2019.		ospfv3-srv6-extensions-05 (work in progress), August 2019.
	[ISO10589]		[ISO10589]
	International Organization for Standardization,		International Organization for Standardization,
	"Intermediate system to Intermediate system intra-domain		"Intermediate system to Intermediate system intra-domain
	routeing information exchange protocol for use in		routeing information exchange protocol for use in
	conjunction with the protocol for providing the		conjunction with the protocol for providing the
	connectionless-mode Network Service (ISO 8473)", ISO/		connectionless-mode Network Service (ISO 8473)", ISO/
	IEC 10589:2002, Second Edition, Nov 2002.		IEC 10589:2002, Second Edition, Nov 2002.
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate		[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
End of changes. 11 change blocks.
	14 lines changed or deleted		14 lines changed or added
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