Users Guide

Examples of Viewing PIM-SM Information
To display which interfaces are enabled with PIM-SM, use the show ip pim interface command from
EXEC Privilege mode.
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.
To display PIM neighbors for each interface, use the show ip pim neighbor command EXEC Privilege
mode.
To display the PIM routing table, use the show ip pim tib command from EXEC privilege mode.
Configuring S,G Expiry Timers
By default, S, G entries expire in 210 seconds. You can configure a global expiry time (for all [S,G] entries) or
configure an expiry time for a particular entry.
If you configure both, the ACL supersedes the global configuration for the specified entries.
When you create, delete, or update an expiry time, the changes are applied when the keep alive timer
refreshes.
To configure a global expiry time or to configure 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 Set the expiry time for a specific (S,G) entry (as shown in the following example).
CONFIGURATION mode
ip pim sparse-mode sg-expiry-timer seconds sg-list access-list-name
The range is from 211 to 86,400 seconds.
The default is 210.
Example Configuring an (S,G) Expiry Time
NOTE: The expiry time configuration is nullified and the default global expiry time is used if:
• an ACL is specified in the ip pim sparse-mode sg-expiry-timer command, but the ACL has
not been created or is a standard ACL.
• if the expiry time is specified for an (S,G) entry in a deny rule.
Dell(conf)#ip access-list extended SGtimer
Dell(config-ext-nacl)#permit ip 10.1.2.3/24 225.1.1.0/24
Dell(config-ext-nacl)#permit ip any 232.1.1.0/24
Dell(config-ext-nacl)#permit ip 100.1.1.0/16 any
PIM Sparse-Mode (PIM-SM) 687