Question

A service provider deploys IPTV using PIM Source-Specific Multicast (SSM) in the 232.0.0.0/8 range. Several legacy set-top boxes on an access segment only support IGMPv2 and cannot signal a specific source in their join messages. The receivers still need to join the correct (S,G) channels served by these SSM groups. Which mechanism on the last-hop router allows these IGMPv2-only hosts to receive SSM channels without upgrading the set-top boxes?

Accepted Answer

Configure SSM mapping so the router statically or via DNS translates the (*,G) IGMPv2 report into an (S,G) join

Answer

Enable a PIM Rendezvous Point and Auto-RP so the shared tree delivers the SSM groups

Answer

Configure IGMPv3 explicitly on the set-top boxes to include the source address

Answer

Enable BSR to dynamically advertise the SSM source addresses to the IGMPv2 receivers