Display pending join requests
Use the show ip pim pending command to display the pending joins on a PIM router. A pending
join can be an IGMPv2 join (host join) or PIM (*,G) or (S,G) join
(PIM router joins, PIM-SM only) received by a router for which there
is no active multicast flow to satisfy the received join. This aids
in determining what flows are being requested on the PIM network,
but for which there is no data. If data availability is expected for
a flow, and a join for that flow is showing as pending, this moves
the troubleshooting search to the source of the flow since the routers
are verified to be seeing the request for data.
Syntax:
show ip pim pending [ip-address]
Displays the joins received on the switch from downstream devices that want to join a specified (*,G) or (S,G) multicast group (flow) address or all multicast groups known on the switch.
A join remains in a pending state until traffic is received for the flow. The VLAN (PIM interface) on which each join was received is also displayed.