Command
Modes
CONFIGURATION
Command
History
Version 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
Command
History
Version 9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Example
E600-7-rpm0#show ip pim bsr-router
PIMv2 Bootstrap information
This system is the Bootstrap Router (v2)
BSR address: 7.7.7.7 (?)
Uptime: 16:59:06, BSR Priority: 0, Hash mask length: 30
Next bootstrap message in 00:00:08
This system is a candidate BSR
Candidate BSR address: 7.7.7.7, priority: 0, hash mask
length: 30
PIM-Sparse Mode (PIM-SM)
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