Users Guide

ip pim snooping
Enable PIM-SM snooping globally on a switch or on a VLAN interface.
Syntax
ip pim snooping [enable]
To disable PIM-SM snooping, use the no ip pim snooping [enable] command.
Defaults Disabled.
Command Modes
• CONFIGURATION: To congure PIM-SM snooping globally, enter the ip pim snooping enable
command in global conguration mode.
• VLAN INTERFACE: To congure PIM-SM snooping on a VLAN interface, enter the ip pim snooping
command in VLAN interface conguration mode.
Command History
Version Description
8.3.12.0 Introduced on the S4810.
8.4.1.1 Introduced on the E-Series ExaScale.
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. Dell Force10 recommends 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-specic 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 show ip pim snooping tib – displays TIB information learned through PIM-SM snooping.
ip pim sparse-mode
Enable PIM sparse mode and IGMP on the interface.
Syntax
ip pim sparse-mode
To disable PIM sparse mode and IGMP, use the no ip pim sparse-mode command.
Defaults Disabled.
Command Modes INTERFACE
1368
PIM-Sparse Mode (PIM-SM)