In "6.2. End.M.GTP6.D", how would SR Gateway know if user packet inside GTP
is IPv4 or IPv6?
I think this info is required to set newly added SRH.NextHeader field in
step 3~5.

My understanding is that information would be provided by the control
plane, and if that's correct, should SR Gateway have 2 (or more) SIDs
corresponding to the type of user packet and also inform gNB to use
different SIDs (dstAddr) based on user packet type?
One could also have SID per TEID, but I'm not sure if that's a good design
choice considering the effort to reduce state in network nodes.

Kentaro Ebisawa <ebike...@gmail.com> <ebike...@gmail.com>
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