>SIPP with source routing requires real authentication. However, the
>source routing stuff is more important than the corresponding IPv4 feature,
>in my opinion, and so will be harder to filter without loss of functionality.
Steve, just to be clear; the "source routing" we're talking about
has its origin in the "P" internet protocol (PIP) developed by
Paul Tsuchiya of Bellcore (now Paul Frances of NTT, don't ask it's
a long story...), right? I assume you're talking about the forwarding
table information? It's a bit different than IPv4 traditional source
routing (which is what is available in CLNP/TUBA), but it's also
a part of the SIPP (SIP + PIP = SIPP) proposal that is IMHO entirely
independent of the internet datagram chosen since it has everything
to do with how you route and very little to do with the header bits you
carry the info in.
My company endorses very nearly everything I say