Check if BGP peer is up: 

show ip bgp vpnv4 vrf [vrf name] summary | i Neighbor|[neighbor IP] 

 

Check if PIM neighborship is up: 

show ip pim vrf [vrf name] neighbor [interface] 

 

Check if they are joining anything: 

show ip mroute vrf [vrf name] | i [interface] 

show ip mroute vrf [vrf name] | i [interface] | i [multicast group IP] 

 

show ip mroute [muticast group IP] >>> to check for joins 

*look for interface in Outgoing Interface List (aka OIL) 

*check uptime 

 

Check ACL and make sure they're permitted to join multicast group 

show ip access-list [ACL name] | i [multicast group IP] 

 

IOS XR 

Check if BGP peer is up: 

show bgp vrf [vrf name] summary | i [neighbor IP] 

 

Check if PIM neighborship is up: 

show pim vrf [vrf name] neighbor [interface] 

 

Check if they are joining anything: 

show mrib vrf [vrf name] ipv4 route 

 

Check ACL and make sure they're permitted to join multicast group 

show access-lists [ACL name] 

 

Additional commands: 

show mfib vrf [vrf name] interface [interface name] route | i Flags: $ 

show mfib vrf [vrf name] interface [interface name] route | i Flags: C