CLI Guide

no ip pim snooping dr-flood
Disable the flooding of multicast packets to the PIM designated router.
Syntax
no ip pim snooping dr-flood
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
Supported Modes Full—Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
Related
Commands
ip pim sparse-mode — enables PIM-SM snooping.
show ip pim bsr-router
View information on the Bootstrap router.
Syntax
show ip pim bsr-router
Command Modes
• EXEC
• EXEC Privilege
PIM-Sparse Mode (PIM-SM)
1165