Multicast Routing query

[hashimwajid1]

Hello 

we are going to migrate our network from Multicast PIM dense mode to PIM Sparse mode. 

we have following queries regarding sparse mode 

1- can active Core switch become RP/Source DR/ Active BSR at same time in case of 2 x Core switches.

                           RP/Source DR/BSR              IIIIIIIII-------------IIIIIIIIIII       backup RP/BSR

                                                                      core1                      core2 

2- Can we have different Receiver DR for same Multicast Group (239.20.255.255) for different customer/segment  (SPT will be common but multiple RPT (Shared tree) with different Receiver DR connecting to same CORE switches) ?

every customer connecting its own router directly to Core switches and all customer wants same multicast stream.

Thanks

[Hector Gustavo Serrano Gutierrez]

You can have both Core Switches act as RP simultaneously using the Anycast-RP approach. This is actually way better to accomplish fast failover in case one of the RP fails (if there is a backup path to another RP).

See Anycast-RP.

For "Source DR", I believe you are referring to the Designated Router (DR) when there are 2 Gateways (First Hop Routers) on the VLAN where the Source of the Multicast stream exists. Yes, one of the FHRs will be the DR and can be RP.

There can be only a single DR per network segment.

HTH.