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CONFIGURATION mode
ip multicast-routing
2 Enable PIM-Sparse Mode.
INTERFACE mode
ip pim sparse-mode
Examples of the show ip pim Commands
To display which interfaces are enabled with PIM-SM, use the show ip pim interface command from EXEC Privilege mode.
Dell#show ip pim interface
Address Interface VIFindex Ver/ Nbr Query DR DR
Mode Count Intvl Prio
189.87.5.6 Te 4/11 0x2 v2/S 1 30 1 127.87.5.6
189.87.3.2 Te 4/12 0x3 v2/S 1 30 1 127.87.3.5
189.87.31.6 Te 7/11 0x0 v2/S 0 30 1 127.87.31.6
189.87.50.6 Te 7/13 0x4 v2/S 1 30 1 127.87.50.6
Dell#
NOTE: You can inuence the selection of the Rendezvous Point by enabling PIM-Sparse Mode on a Loopback interface and
assigning a low IP address.
To display PIM neighbors for each interface, use the show ip pim neighbor command from EXEC Privilege mode.
Dell#show ip pim neighbor
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
127.87.5.5 Te 4/11 01:44:59/00:01:16 v2 1 / S
127.87.3.5 Te 4/12 01:45:00/00:01:16 v2 1 / DR
127.87.50.5 Te 7/13 00:03:08/00:01:37 v2 1 / S
Dell#
To display the PIM routing table, use the show ip pim tib command from EXEC privilege mode.
Dell#show ip pim tib
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
(*, 192.1.2.1), uptime 00:29:36, expires 00:03:26, RP 10.87.2.6, flags: SCJ
Incoming interface: TenGigabitEthernet 4/12, RPF neighbor 10.87.3.5
Outgoing interface list:
TenGigabitEthernet 4/11
TenGigabitEthernet 7/13
(10.87.31.5, 192.1.2.1), uptime 00:01:24, expires 00:02:26, flags: FT
Incoming interface: TenGigabitEthernet 7/11, RPF neighbor 0.0.0.0
Outgoing interface list:
TenGigabitEthernet 4/11
TenGigabitEthernet 4/12
TenGigabitEthernet 7/13
--More--
Conguring S,G Expiry Timers
By default, S, G entries expire in 210 seconds. You can congure a global expiry time (for all [S,G] entries) or congure an expiry time for a
particular entry.
If you congure both, the ACL supersedes the global conguration for the specied entries.
When you create, delete, or update an expiry time, the changes are applied when the keep alive timer refreshes.
PIM Sparse-Mode (PIM-SM)
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