This doc is very confusing.
Its title and discussion throughout indicates “TRILL over IP”, including figs
in Sec 4, but the only actual encapsulations described are TRILL over UDP and
TRILL over TCP.
IMO, this needs a very deep scrub to resolve. It would help to understand that
the root issue is that the encapsulation headers are *all* those added to the
TRILL packet trying to transit the IP network; there’s no “inserting” of
encapsulation between IP and TRILL.
- explaining why you require IPsec tunnel mode, when the encapsulations
presented would be completely secure using TLS/DLS or any variant of IPsec on
the encapsulated traffic
- explaining the relation between TRILL MTU discovery and the MTU of the
transport level, and how these interact (or could interfere) with each other
- why are not other more obvious encapsulations being considered, notably any
TCP/UDP encapsulation that already supports Ethernet, including GRE (which
might then allow this doc to be condensed to instructions for configuration,
rather than trying to specify a new encapsulation system)
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