Multicast - ASM and SSM on same network

It is possible to run both any source multicast and source specific multicast on the same Multicast network.

When you enable SSM, you enable it for a particular range. That range by default is Alternatively, you can specify the range you want to use SSM using an ACL.

In either case, if a host tries to join any group within the specified SSM range without specifying a source, that join request will be dropped. However, if a host attempts to join any group that is not within the specified SSM range without specifying a source, that join message will be accepted and will behave like a normal any source multicast.