Administrator Guide

To re-enable the flooding of multicast packets to the PIM designated router, use the ip pim
snooping dr-flood command.
Defaults Enabled.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.5(0.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.4.1.0 Introduced on the E-Series ExaScale.
Usage
Information
By default, when you enable PIM-SM snooping, a switch floods all multicast traffic to the PIM designated
router (DR), including unnecessary multicast packets. To minimize the traffic sent over the network to
the designated router, you can disable designated-router flooding.
When designated-router flooding is disabled, PIM-SM snooping only forwards the multicast traffic, which
belongs to a multicast group for which the switch receives a join request, on the port connected towards
the designated router.
If the PIM DR flood is not disabled (default setting):
● Multicast traffic is transmitted on the egress port towards the PIM DR if the port is not the incoming
interface.
● Multicast traffic for an unknown group is sent on the port towards the PIM DR. When DR flooding is
disabled, multicast traffic for an unknown group is dropped.
show ip pim bsr-router
View information on the Bootstrap router.
Z9000
Syntax
show ip pim bsr-router
Command Modes
● EXEC
● EXEC Privilege
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.5(0.0) 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 ExaScale.
952 PIM-Sparse Mode (PIM-SM)