Authors,
The END.DX2, END.DX2V, END.DT2U, END.DT2M, END.DX4, END.DT4, END.DX6, END.DT6
SIDs all reference the Effective Next Header (ENH). The ENH is the first
upper-layer header beyond the IPv6 header chain.
In many cases, the ENH immediately follows the SRH. In these cases, it is easy
to identify the ENH and SID processing is easy.
In other cases, the ENH does not immediately follow the SRH. In these cases,
SID processing is more difficult because the ENH cannot be identified without
reading ahead to the end of the extension header chain.
In one final case, when an ESP header falls between the SRH and the ENH, SID
processing becomes very difficult because the ENH cannot be identified until
the payload is decrypted.
At very least, you should address these issues in the document. At best, you
should consider encoding these "destination SIDs" in IPv6 Destination options.
Ron
Juniper Business Use Only
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