in multicast the command
ip pim rp-address ip
what ip should i use ?
should i make a loopback int and use it ?
Hello Mohammed -
Loopback interfaces may be used as an RP address, if you enable PIM on them as you would your other interfaces. The advantage of a loopback interface, is that it may still be reachable, when a router has multiple interfaces, and a single physical interface fails, the loopback still may be reachable, and that makes it a more reliable choice for many functions, including the RP.