Reference Guide

1150 | PIM-Sparse Mode (PIM-SM)
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ip pim snooping
e
x
Enable PIM-SM snooping globally on a switch or on a VLAN interface.
Syntax
ip pim snooping
[enable]
To disable PIM-SM snooping enter the
no form of the command.
Defaults
Disabled.
Command Modes
CONFIGURATION: To configure PIM-SM snooping globally, enter the ip pim
snooping enable
command in global configuration mode.
VLAN INTERFACE: To configure PIM-SM snooping on a VLAN interface, enter
the
ip pim snooping command in VLAN interface configuration mode.
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
Version 8.3.19.0 Introduced on S4820T
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.1.1 Introduced on E-Series ExaScale
show ip pim snooping tib Display TIB information learned through PIM-SM snooping.