Reference Guide

712 | PIM Sparse-Mode
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Related Configuration Tasks
• Configurable S,G Expiry Timers
• Configure a Static Rendezvous Point
• Elect an RP using the BSR Mechanism
• Configure a Designated Router
• Create Multicast Boundaries and Domains
• Set a Threshold for Switching to the SPT
• PIM-SM Graceful Restart
• First Packet Forwarding for Lossless Multicast
• Monitoring PIM
Enable PIM-SM
You must enable PIM-SM on each participating interface:
Display which interfaces are enabled with PIM-SM using the command
show [ip | ipv6] pim interface from
EXEC Privilege mode, as shown in the example below.
FTOS#show ip pim interface
Address Interface VIFindex Ver/ Nbr Query DR DR
Mode Count Intvl Prio
189.87.5.6 Gi 4/11 0x2 v2/S 1 30 1 127.87.5.6
189.87.3.2 Gi 4/12 0x3 v2/S 1 30 1 127.87.3.5
189.87.31.6 Gi 7/11 0x0 v2/S 0 30 1 127.87.31.6
189.87.50.6 Gi 7/13 0x4 v2/S 1 30 1 127.87.50.6
FTOS#
Display PIM neighbors for each interface using the command show [ip | ipv6] pim neighbor from EXEC
Privilege mode, as shown in the example below.
FTOS#show ip pim neighbor
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
127.87.5.5 Gi 4/11 01:44:59/00:01:16 v2 1 / S
127.87.3.5 Gi 4/12 01:45:00/00:01:16 v2 1 / DR
127.87.50.5 Gi 7/13 00:03:08/00:01:37 v2 1 / S
FTOS#
IP Version Task Command Command Mode
IPv4 Enable PIM-Sparse Mode on an interface. ip pim sparse-mode INTERFACE
IPv6 Enable PIM-Sparse Mode on an interface. ipv6 pim sparse-mode INTERFACE
Note: You can influence the selection of the Rendezvous Point by enabling PIM-Sparse Mode on a
loopback interface and assigning a low IP address.