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RE: Adoption Call for "The IPv6 Compact Routing Header (CRH)"

"Templin (US), Fred L" <Fred.L.Templin@boeing.com> Thu, 28 May 2020 19:56 UTC

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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: IPv6 List <ipv6@ietf.org>
Subject: RE: Adoption Call for "The IPv6 Compact Routing Header (CRH)"
Thread-Topic: Adoption Call for "The IPv6 Compact Routing Header (CRH)"
Thread-Index: AQHWNR5XYdjeS4DU7kubkMY4XJBQoai95gnw
Date: Thu, 28 May 2020 19:56:17 +0000
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People have asked about the OMNI and AERO drafts, and these are now updated

to show the application of Segment Routing in general and CRH in particular:



https://datatracker.ietf.org/doc/draft-templin-6man-omni-interface/

https://datatracker.ietf.org/doc/draft-templin-intarea-6706bis/



The latter draft in particular cites CRH. The entire section on segment routing should

be of general interest, but below is the current section text on CRH:



Thanks - Fred


3.2.9.  Segment Routing Header Compression

   In the Segment Routing use cases discussed above, the segment routing
   headers must be kept to a minimum size since source and target
   Clients may be located behind low-end wireless links (e.g., 1Mbps or
   less).  The Compressed Routing Header (CRH)
   [I-D.bonica-6man-comp-rtg-hdr] provides a compact form that reduces
   the header size by omitting information that can already be derived
   by intermediate Bridges.  The CRH Helper
   option[I-D.bonica-6man-crh-helper-opt] can be used to encode the AERO
   Route Optimization TLV, and the final hop Bridge that performs route
   optimization may remove the CRH and its helper before encapsulating
   and forwarding to the target Client.

   The CRH and its companion helper option are therefore seen as
   critical architectural elements that should be quickly progressed
   through the standards process.  Implementations SHOULD use the CRH
   and its companion helper option instead of other Routing Header types

   whenever possible to conserve bandwidth.

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