[c-nsp] Interdomain Multicast Routing

[Muarwi]

Hi guys, I'm sorry if my questions is rather out of cisco's things.

I've read books about interdomain multicast routing (also one from cisco
press). From what I get, the solutions offered is PIM SM - MBGP - MSDP.

My questions is :
1. what about using PIM Bidir for interdomain multicast? Is it possible to
implement it in Cisco?
2. Has BGMP been being implemented in vendors?

Thanks a lot for your response