Generic UDP Encapsulation
draft-ietf-intarea-gue-04
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2017-05-18
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draft-ietf-nvo3-gue
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Internet Area WG T. Herbert
Internet-Draft Quantonium
Intended status: Standard track L. Yong
Expires November 19, 2017 Huawei USA
O. Zia
Microsoft
May 18, 2017
Generic UDP Encapsulation
draft-ietf-intarea-gue-04
Status of this Memo
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Copyright (c) 2017 IETF Trust and the persons identified as the
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This document is subject to BCP 78 and the IETF Trust's Legal
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publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
Herbert, Yong, Zia Expires November, 2017 [Page 1]
Internet Draft Generic UDP Encapsulation May 18, 2017
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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Herbert, Yong, Zia Expires November, 2017 [Page 2]
Internet Draft Generic UDP Encapsulation May 18, 2017
Abstract
This specification describes Generic UDP Encapsulation (GUE), which
is a scheme for using UDP to encapsulate packets of different IP
protocols for transport across layer 3 networks. By encapsulating
packets in UDP, specialized capabilities in networking hardware for
efficient handling of UDP packets can be leveraged. GUE specifies
basic encapsulation methods upon which higher level constructs, such
as tunnels and overlay networks for network virtualization, can be
constructed. GUE is extensible by allowing optional data fields as
part of the encapsulation, and is generic in that it can encapsulate
packets of various IP protocols.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Terminology and acronyms . . . . . . . . . . . . . . . . . 5
1.2. Requirements Language . . . . . . . . . . . . . . . . . . 6
2. Base packet format . . . . . . . . . . . . . . . . . . . . . . 7
2.1. GUE version . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Version 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1. Header format . . . . . . . . . . . . . . . . . . . . . . . 8
3.2. Proto/ctype field . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 Proto field . . . . . . . . . . . . . . . . . . . . . . 9
3.2.2 Ctype field . . . . . . . . . . . . . . . . . . . . . . 10
3.3. Flags and extension fields . . . . . . . . . . . . . . . . 10
3.3.1. Requirements . . . . . . . . . . . . . . . . . . . . . 10
3.3.2. Example GUE header with extension fields . . . . . . . 11
3.4. Private data . . . . . . . . . . . . . . . . . . . . . . . 12
3.5. Message types . . . . . . . . . . . . . . . . . . . . . . . 12
3.5.1. Control messages . . . . . . . . . . . . . . . . . . . 12
3.5.2. Data messages . . . . . . . . . . . . . . . . . . . . . 13
3.6. Hiding the transport layer protocol number . . . . . . . . 13
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