Track 2 - Internet Routing and IP Network management (7-Oct-96)

Multicast

3) Protocols

B) PIM dense protocol

  1. eliminates broacast behavior by using "renevous points"

    (at a cost of vulnerability to partition failures)

  2. 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

  3. for low traffic groups, can reduce forwarding state by keeping on a single per-group tree (subsumes CBT)

  4. Requires Changes to IGMP (Join, Leave)

  5. cisco implementation by Dino Farinacci