Users Guide

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-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
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
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
7.8.1.0 Introduced on the C-Series for the port-channels and the S-Series.
Usage
Information
The interface must be enabled (the 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.
1264 PIM-Sparse Mode (PIM-SM)