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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
Supported Modes Full—Swtich
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.
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
show ip pim interface
View information on the interfaces with IP PIM enabled.
Syntax
show ip pim interface
Command Modes
● EXEC
● EXEC Privilege
Supported Modes Full—Swtich
PIM-Sparse Mode (PIM-SM) 899