Displaying PIM neighbor data

These commands enable listings of either all PIM neighbors the router detects or the data for a specific PIM neighbor.

Syntax:

show ip pim neighbor

Lists PIM neighbor information for all PIM neighbors connected to the router:

IP Address

Lists the IP address of a neighbor multicast router.

VLAN

Lists the VLAN through which the router connects to the indicated neighbor.

Up Time

Shows the elapsed time during which the neighbor has maintained a PIM route to the router.

Expire Time

Indicates how long before the router ages-out the current flow (group membership.) This value decrements until:

• Reset by a state-refresh packet originating from the upstream multicast router. (The upstream multicast router issues state-refresh packets for the current group as long as it either continues to receive traffic for the current flow or receives state-refresh packets for the current flow from another upstream multicast router.

• Reset by a new flow for the current multicast group on the VLAN.

• The timer expires (reaches 0.) In this case, the switch has not received either a state-refresh packet or new traffic for the current multicast group and ages-out (drops) the group entry.

DR Priority

Shows the currently configured priority for DR operation on the interface.

switch(config)# show ip pim neighbor

 PIM Neighbors

  IP Address      VLAN Up Time (sec)     Expire Time (sec)     DR Priority
  --------------- ---- ----------------  ----------------      ----------
  10.10.10.2      100  348               90                    1
  10.20.10.1      200  410               97                    1

show ip pim neighbor [ip-address]

switch(config)# show ip pim neighbor 10.10.10.2
 PIM Neighbor
  IP Address : 10.10.10.2
  VLAN       : 100
  Up Time (sec)     : 678
  Expire Time (sec) : 93
  DR Priority       : 1