< draft-chen-bier-te-ospf-01.txt		draft-chen-bier-te-ospf-02.txt >
	skipping to change at page 1, line 19 ¶		skipping to change at page 1, line 19 ¶
	Verizon Inc.		Verizon Inc.
	Y. Fan		Y. Fan
	Casa Systems		Casa Systems
	L. Liu		L. Liu
	Fujitsu		Fujitsu
	X. Liu		X. Liu
	Volta Networks		Volta Networks
	27 July 2021		27 July 2021
	OSPF Extensions for BIER-TE		OSPF Extensions for BIER-TE
	draft-chen-bier-te-ospf-01		draft-chen-bier-te-ospf-02
	Abstract		Abstract
	This document describes OSPF extensions for distributing BitPositions		This document describes OSPF extensions for distributing BitPositions
	configured on the links in "Bit Index Explicit Replication Traffic		configured on the links in "Bit Index Explicit Replication Traffic
	Engineering" (BIER-TE) domain.		Engineering" (BIER-TE) domain.
	Requirements Language		Requirements Language
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	skipping to change at page 4, line 24 ¶		skipping to change at page 4, line 24 ¶
	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 (TBD1) | Length |		| Type (TBD1) | Length |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| sub-domain-id | MT-ID | BAR | IPA |		| sub-domain-id | MT-ID | BAR | IPA |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| BitPosition | DrEndBitPosition |		| BitPosition | DrEndBitPosition |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Sub-TLVs (variable) |
	~ ~
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Figure 2: BIER-TE Sub-TLV		Figure 2: BIER-TE Sub-TLV
	Type: TBD1 is to be assigned by IANA.		Type: TBD1 is to be assigned by IANA.
	Length: Variable, dependent on Sub-Sub-TLVs.		Length: 8 (octets).
	sub-domain-id: Unique value identifying a BIER-TE sub-domain.		sub-domain-id: Unique value identifying a BIER-TE sub-domain.
	MT-ID: Multi-Topology ID identifying the topology that is associated		MT-ID: Multi-Topology ID identifying the topology that is associated
	with the BIER-TE sub-domain.		with the BIER-TE sub-domain.
	BAR: Single-octet BIER Algorithm used to calculate underlay paths to		BAR: Single-octet BIER Algorithm used to calculate underlay paths to
	reach other BFRs. Values are allocated from the "BIER		reach other BFRs. Values are allocated from the "BIER
	Algorithm" registry defined in [RFC8401].		Algorithm" registry defined in [RFC8401].
	skipping to change at page 5, line 18 ¶		skipping to change at page 5, line 14 ¶
	DrEndBitPosition: A 2-octet field encoding the BitPosition of the		DrEndBitPosition: A 2-octet field encoding the BitPosition of the
	connection on the designated router (DR) end. This field is		connection on the designated router (DR) end. This field is
	valid when the Link Type in the OSPFv2 Extended Link TLV		valid when the Link Type in the OSPFv2 Extended Link TLV
	containing this Sub-TLV is 2 (i.e., Transit Network or LAN).		containing this Sub-TLV is 2 (i.e., Transit Network or LAN).
	For the other value of the Link Type, this field MUST be		For the other value of the Link Type, this field MUST be
	ignored. The DrEndBitPosition may be configured on the link/		ignored. The DrEndBitPosition may be configured on the link/
	interface to a transit network (i.e., broadcast link or say		interface to a transit network (i.e., broadcast link or say
	LAN).		LAN).
	No Sub-TLV is defined so far. Note that if each of BitPosition and		Note that if each of BitPosition and DrEndBitPosition uses more than
	DrEndBitPosition uses more than 2 octets, we use 4 or more octets for		2 octets, we use 4 or more octets for each of them.
	each of them.
	3. Security Considerations		3. Security Considerations
	TBD.		TBD.
	4. IANA Considerations		4. IANA Considerations
	Under "OSPFv2 Extended Link TLV Sub-TLVs registry" as defined in		Under "OSPFv2 Extended Link TLV Sub-TLVs registry" as defined in
	[RFC7684], IANA is requested to assign a new registry value for BIER-		[RFC7684], IANA is requested to assign a new registry value for BIER-
	TE Sub-TLV as follows:		TE Sub-TLV as follows:
End of changes. 4 change blocks.
	8 lines changed or deleted		4 lines changed or added
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