Reference 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
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 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.
Related
Commands
ip pim snooping — enables PIM-SM snooping.
show ip pim bsr-router
View information on the Bootstrap router.
Z9000
Syntax
show ip pim bsr-router
Command Modes
• EXEC
• EXEC Privilege
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