Users Guide

ip multicast-routing
Related Configuration Tasks
The following are related PIM-SM configuration tasks.
• Configuring S,G Expiry Timers
• Configuring a Static Rendezvous Point
• Configuring a Designated Router
• Creating Multicast Boundaries and Domains
Enable PIM-SM
You must enable PIM-SM on each participating interface.
1 Enable multicast routing on the system.
CONFIGURATION mode
ip multicast-routing
2 Enable PIM-Sparse mode.
INTERFACE mode
ip pim sparse-mode
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
PIM Sparse-Mode (PIM-SM)
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