draft-ietf-intarea-gue-03.txt		draft-ietf-intarea-gue-04.txt
	Internet Area WG T. Herbert		Internet Area WG T. Herbert
	Internet-Draft Quantonium		Internet-Draft Quantonium
	Intended status: Standard track L. Yong		Intended status: Standard track L. Yong
	Expires November 11, 2017 Huawei USA		Expires November 19, 2017 Huawei USA
	O. Zia		O. Zia
	Microsoft		Microsoft
	May 10, 2017		May 18, 2017
	Generic UDP Encapsulation		Generic UDP Encapsulation
	draft-ietf-intarea-gue-03		draft-ietf-intarea-gue-04
	Status of this Memo		Status of this Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF), its areas, and its working groups. Note that		Task Force (IETF), its areas, and its working groups. Note that
	other groups may also distribute working documents as Internet-		other groups may also distribute working documents as Internet-
	Drafts.		Drafts.
	skipping to change at page 4, line 23 ¶		skipping to change at page 4, line 23 ¶
	5.12 Negotiation of acceptable flags and extension fields . . . 24		5.12 Negotiation of acceptable flags and extension fields . . . 24
	6. Motivation for GUE . . . . . . . . . . . . . . . . . . . . . . 24		6. Motivation for GUE . . . . . . . . . . . . . . . . . . . . . . 24
	6.1. Benefits of GUE . . . . . . . . . . . . . . . . . . . . . . 24		6.1. Benefits of GUE . . . . . . . . . . . . . . . . . . . . . . 24
	6.2 Comparison of GUE to other encapsulations . . . . . . . . . 25		6.2 Comparison of GUE to other encapsulations . . . . . . . . . 25
	7. Security Considerations . . . . . . . . . . . . . . . . . . . . 26		7. Security Considerations . . . . . . . . . . . . . . . . . . . . 26
	8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 27		8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 27
	8.1. UDP source port . . . . . . . . . . . . . . . . . . . . . . 27		8.1. UDP source port . . . . . . . . . . . . . . . . . . . . . . 27
	8.2. GUE version number . . . . . . . . . . . . . . . . . . . . 28		8.2. GUE version number . . . . . . . . . . . . . . . . . . . . 28
	8.3. Control types . . . . . . . . . . . . . . . . . . . . . . . 28		8.3. Control types . . . . . . . . . . . . . . . . . . . . . . . 28
	8.4. Flag-fields . . . . . . . . . . . . . . . . . . . . . . . . 28		8.4. Flag-fields . . . . . . . . . . . . . . . . . . . . . . . . 28
	9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 29		9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 28
	10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29		10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
	10.1. Normative References . . . . . . . . . . . . . . . . . . . 29		10.1. Normative References . . . . . . . . . . . . . . . . . . . 29
	10.2. Informative References . . . . . . . . . . . . . . . . . . 30		10.2. Informative References . . . . . . . . . . . . . . . . . . 29
	Appendix A: NIC processing for GUE . . . . . . . . . . . . . . . . 33		Appendix A: NIC processing for GUE . . . . . . . . . . . . . . . . 32
	A.1. Receive multi-queue . . . . . . . . . . . . . . . . . . . . 33		A.1. Receive multi-queue . . . . . . . . . . . . . . . . . . . . 32
	A.2. Checksum offload . . . . . . . . . . . . . . . . . . . . . 33		A.2. Checksum offload . . . . . . . . . . . . . . . . . . . . . 33
	A.2.1. Transmit checksum offload . . . . . . . . . . . . . . . 34		A.2.1. Transmit checksum offload . . . . . . . . . . . . . . . 33
	A.2.2. Receive checksum offload . . . . . . . . . . . . . . . 34		A.2.2. Receive checksum offload . . . . . . . . . . . . . . . 34
	A.3. Transmit Segmentation Offload . . . . . . . . . . . . . . . 35		A.3. Transmit Segmentation Offload . . . . . . . . . . . . . . . 34
	A.4. Large Receive Offload . . . . . . . . . . . . . . . . . . . 36		A.4. Large Receive Offload . . . . . . . . . . . . . . . . . . . 35
	Appendix B: Implementation considerations . . . . . . . . . . . . 36		Appendix B: Implementation considerations . . . . . . . . . . . . 36
	B.1. Priveleged ports . . . . . . . . . . . . . . . . . . . . . 36		B.1. Priveleged ports . . . . . . . . . . . . . . . . . . . . . 36
	B.2. Setting flow entropy as a route selector . . . . . . . . . 37		B.2. Setting flow entropy as a route selector . . . . . . . . . 36
	B.3. Hardware protocol implementation considerations . . . . . . 37		B.3. Hardware protocol implementation considerations . . . . . . 36
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 37		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 37
	1. Introduction		1. Introduction
	This specification describes Generic UDP Encapsulation (GUE) which is		This specification describes Generic UDP Encapsulation (GUE) which is
	a general method for encapsulating packets of arbitrary IP protocols		a general method for encapsulating packets of arbitrary IP protocols
	within User Datagram Protocol (UDP) [RFC0768] packets. Encapsulating		within User Datagram Protocol (UDP) [RFC0768] packets. Encapsulating
	packets in UDP facilitates efficient transport across networks.		packets in UDP facilitates efficient transport across networks.
	Networking devices widely provide protocol specific processing and		Networking devices widely provide protocol specific processing and
	optimizations for UDP (as well as TCP) packets. Packets for atypical		optimizations for UDP (as well as TCP) packets. Packets for atypical
	skipping to change at page 28, line 46 ¶		skipping to change at page 28, line 46 ¶
	| 128..255 | User defined | This document |		| 128..255 | User defined | This document |
	+----------------+------------------+---------------+		+----------------+------------------+---------------+
	8.4. Flag-fields		8.4. Flag-fields
	IANA is requested to create a "GUE flag-fields" registry to allocate		IANA is requested to create a "GUE flag-fields" registry to allocate
	flags and extension fields used with GUE. This shall be a registry of		flags and extension fields used with GUE. This shall be a registry of
	bit assignments for flags, length of extension fields for		bit assignments for flags, length of extension fields for
	corresponding flags, and descriptive strings. There are sixteen bits		corresponding flags, and descriptive strings. There are sixteen bits
	for primary GUE header flags (bit number 0-15). New values are		for primary GUE header flags (bit number 0-15). New values are
	assigned in accordance with RFC Required policy [RFC5226].		assigned in accordance with RFC Required policy [RFC5226]. New flags
			should be allocated from high to low order bit contiguously without
	+-------------+--------------+-------------+--------------------+		holes. [GUEXTENS] requests in initial set of flag assignments.
	| Flags bits | Field size | Description | Reference |
	+-------------+--------------+-------------+--------------------+
	| Bit 0 | 4 bytes | Group | [GUEEXTENS] |
	| | | identifier | |
	| | | | |
	| Bit 1..3 | 001->8 bytes | Security | [GUEEXTENS] |
	| | 010->16 bytes| | |
	| | 011->32 bytes| | |
	| | | | |
	| Bit 4 | 8 bytes | Fragmen- | [GUEEXTENS] |
	| | | tation | |
	| | | | |
	| Bit 5 | 4 bytes | Payload | [GUEEXTENS] |
	| | | transform | |
	| | | | |
	| Bit 6 | 4 bytes | Remote | [GUEEXTENS] |
	| | | checksum | |
	| | | offload | |
	| | | | |
	| Bit 7 | 4 bytes | Checksum | [GUEEXTENS] |
	| | | | |
	| Bit 8..15 | | Unassigned | |
	+-------------+--------------+-------------+--------------------+
	New flags are to be allocated from high to low order bit contiguously
	without holes.
	9. Acknowledgements		9. Acknowledgements
	The authors would like to thank David Liu, Erik Nordmark, Fred		The authors would like to thank David Liu, Erik Nordmark, Fred
	Templin, Adrian Farrel, Bob Briscoe, and Murray Kucherawy for		Templin, Adrian Farrel, Bob Briscoe, and Murray Kucherawy for
	valuable input on this draft.		valuable input on this draft.
	10. References		10. References
	10.1. Normative References		10.1. Normative References
End of changes. 9 change blocks.
	41 lines changed or deleted		15 lines changed or added
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