A standard ripd won't ever see the RIP44 packets
because they're
encapsulated in an IPIP tunnel packet. The standard ripd doesn't
know how to de-encapsulate them first.
Of course when you have a single multi-point tunnel interface like in Linux (tunl0), you
could have ripd listening on that interface and it would see the correct packet format.
However, I think the default ripd does some sanity checks that make it fail on the
special
assumptions made in RIP44.
Rob