Generic UDP Encapsulation
draft-ietf-intarea-gue-05

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Internet Area WG                                              T. Herbert
Internet-Draft                                                Quantonium
Intended status: Standard track                                  L. Yong
Expires June 30, 2017                                         Huawei USA
                                                                  O. Zia
                                                               Microsoft
                                                       December 30, 2017

                       Generic UDP Encapsulation
                       draft-ietf-intarea-gue-05

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Herbert, Yong, Zia         Expires June, 2018                   [Page 1]
Internet Draft         Generic UDP Encapsulation       December 30, 2017

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Herbert, Yong, Zia         Expires June, 2018                   [Page 2]
Internet Draft         Generic UDP Encapsulation       December 30, 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 variant . . . . . . . . . . . . . . . . . . . . . . . .  7
   3. Variant 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