Administrator Guide

NOTE: You can inuence 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 EXEC Privilege mode.
Dell#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
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: GigabitEthernet 4/12, RPF neighbor 10.87.3.5
Outgoing interface list:
GigabitEthernet 4/11
GigabitEthernet 7/13
(10.87.31.5, 192.1.2.1), uptime 00:01:24, expires 00:02:26, flags: FT
Incoming interface: GigabitEthernet 7/11, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 4/11
GigabitEthernet 4/12
GigabitEthernet 7/13
--More--
Conguring S,G Expiry Timers
By default, S, G entries expire in 210 seconds. You can congure a global expiry time (for all [S,G] entries) or congure an expiry time for a
particular entry.
If you congure both, the ACL supersedes the global conguration for the specied entries.
When you create, delete, or update an expiry time, the changes are applied when the keep alive timer refreshes.
To congure a global expiry time or to congure the expiry time for a particular (S,G) entry, use the following commands.
1 Enable global expiry timer for S, G entries.
CONFIGURATION mode
ip pim sparse-mode sg-expiry-timer seconds
The range is from 211 to 86,400 seconds.
The default is 210.
2 Create an extended ACL.
CONFIGURATION mode
ip access-list extended access-list-name
3 Specify the source and group to which the timer is applied using extended ACLs with permit rules only.
CONFIG-EXT-NACL mode
598
PIM Sparse-Mode (PIM-SM)