Generic UDP Encapsulation
draft-ietf-intarea-gue-07

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Internet Area WG                                              T. Herbert
Internet-Draft                                                Quantonium
Intended status: Standard track                                  L. Yong
Expires September 8, 2019                                    Independent
                                                                  O. Zia
                                                               Microsoft
                                                           March 7, 2019

                       Generic UDP Encapsulation
                       draft-ietf-intarea-gue-07

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Herbert, Yong, Zia      Expires September, 2019                 [Page 1]
Internet Draft         Generic UDP Encapsulation           March 7, 2019

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Herbert, Yong, Zia      Expires September, 2019                 [Page 2]
Internet Draft         Generic UDP Encapsulation           March 7, 2019

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. Applicability . . . . . . . . . . . . . . . . . . . . . . .  5
     1.2. Terminology and acronyms  . . . . . . . . . . . . . . . . .  6
     1.3. Requirements Language . . . . . . . . . . . . . . . . . . .  7
   2. Base packet format  . . . . . . . . . . . . . . . . . . . . . .  8
     2.1. GUE variant . . . . . . . . . . . . . . . . . . . . . . . .  8
   3. Variant 0 . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     3.1. Header format . . . . . . . . . . . . . . . . . . . . . . .  9
     3.2. Proto/ctype field . . . . . . . . . . . . . . . . . . . . . 10
       3.2.1. Proto field . . . . . . . . . . . . . . . . . . . . . . 10
       3.2.2. Ctype field . . . . . . . . . . . . . . . . . . . . . . 11
     3.3. Flags and extension fields  . . . . . . . . . . . . . . . . 11
       3.3.1. Requirements  . . . . . . . . . . . . . . . . . . . . . 11
       3.3.2. Example GUE header with extension fields  . . . . . . . 12
     3.4. Private data  . . . . . . . . . . . . . . . . . . . . . . . 13
     3.5. Message types . . . . . . . . . . . . . . . . . . . . . . . 13
       3.5.1. Control messages  . . . . . . . . . . . . . . . . . . . 13
       3.5.2. Data messages . . . . . . . . . . . . . . . . . . . . . 14