1. Juniper and some others follows the
initserv model. So most drafts that juniper etc support are RSVP drafts.
Cisco and some others looks it more in
terms of CRLDP. Both support LDP
Ummmm, Cisco doesn't support
CRLDP, never has. Juniper and intserv? RSVP isn't
just intserv.
3. Protocols supported are mainly the same:
MPBGP (draft l2vpn-kompella), OSPF extenstions etc. and several L2VPN drafts
which most vendors will support.
I don't think Cisco support Kompella
either.