Command Line Reference Guide

1052 | PIM-Sparse Mode (PIM-SM)
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Command
History
Usage
Information
Because PIM-SM snooping is used in a Layer 2 environment, PIM-SM snooping and PIM multicast
routing are mutually exclusive. PIM-SM snooping cannot be enabled on a switch/router if PIM-SM or
PIM-DM is enabled.
If enabled at the global level, PIM-SM snooping is automatically enabled on all VLANs unless the no
ip pim snooping command has been entered on a VLAN.
If enabled at the VLAN level, PIM-SM snooping requires that you also enter the no shutdown
command to enable the interface.
PIM-SM snooping is supported with IGMP snooping, and forwards the IGMP report on the port that
connects to the PIM DR. It is recommended that you do not enable IGMP snooping on a PIM-SM
snooping-enabled VLAN interface unless until it is necessary for VLAN operation.
PIM-SM snooping listens to PIM hello and PIM-SM join and prune messages while maintaining the
VLAN- and port-specific information in multicast packets that are snooped.
To display information about the operation of PIM-SM snooping on a switch, enter the
show ip pim
summary
command.
Related
Commands
ip pim sparse-mode
c e s
Enable PIM sparse mode and IGMP on the interface.
Syntax
ip pim sparse-mode
To disable PIM sparse mode and IGMP, enter no ip pim sparse-mode.
Defaults
Disabled.
Command Modes
INTERFACE
Command
History
Usage
Information
C-Series supports a maximum of 31 PIM interfaces.
The interface must be enabled (no shutdown command) and not have the switchport command
configured. Multicast must also be enabled globally (using the
ip multicast-lag-hashing command). PIM
is supported on the port-channel interface.
Related
Commands
Version 8.4.1.1 Introduced on E-Series ExaScale
show ip pim snooping tib Display TIB information learned through PIM-SM snooping.
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.8.1.0 Introduced on C-Series on port-channels and S-Series
ip multicast-lag-hashing Enable multicast globally.