> But the only IPv4 anycast
> that I know of does use MSDP :
> http://www.ietf.org/internet-drafts/draft-ietf-mboned-anycast-rp-08.txt
> Is there a different proposal ? What's the RFC / I-D name ?
You seem to be confusing anycast with something complicated. It's not a
protocol, it's a method of assigning and routing addresses.
-Bill