Track 2 - Internet Routing and IP Network management (7-Oct-96)
Multicast
3) Protocols
B) PIM dense protocol
- eliminates broacast behavior by using "renevous points"
(at a cost of vulnerability to partition failures)
- eliminates separate multicast routing table
- uses unicast table instead
- unicast use simplifies policy and complicates deployment
- CBT uses spanning tree and does not depend on unicast/multicast
- for low traffic groups, can reduce forwarding state
by keeping on a single per-group tree (subsumes CBT)
- Requires Changes to IGMP (Join, Leave)
- cisco implementation by Dino Farinacci