User Manual

C HAPTER 50 | Multicast Routing Commands
PIM Multicast Routing
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EXAMPLE
Console(config)#router pim
Console(config)#exit
Console#show ip pim interface
PIM is enabled.
VLAN 1 is up.
PIM Mode : Dense Mode
IP Address : 192.168.0.2
Hello Interval : 30 sec
Hello HoldTime : 105 sec
Triggered Hello Delay : 5 sec
Join/Prune Holdtime : 210 sec
Lan Prune Delay : Disabled
Propagation Delay : 500 ms
Override Interval : 2500 ms
Graft Retry Interval : 3 sec
Max Graft Retries : 3
State Refresh Ori Int : 60 sec
Console#
ip pim This command enables PIM-DM or PIM-SM on the specified interface. Use
the no form to disable PIM-DM or PIM-SM on this interface.
SYNTAX
[no] ip pim {dense-mode | sparse-mode}
dense-mode - Enables PIM Dense Mode.
sparse-mode - Enables PIM Sparse Mode.
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration (VLAN)
COMMAND USAGE
◆ To fully enable PIM, you need to enable multicast routing globally for
the router with the ip multicast-routing command, enable PIM globally
for the router with the router pim command, and also enable PIM-DM
or PIM-SM for each interface that will participate in multicast routing
with this command.
◆ If you enable PIM on an interface, you should also enable IGMP on that
interface. PIM mode selection determines how the switch populates the
multicast routing table, and how it forwards packets received from
directly connected LAN interfaces.Dense mode interfaces are always
added to the multicast routing table. Sparse mode interfaces are added
only when periodic join messages are received from downstream
routers, or a group member is directly connected to the interface.
◆ Dense-mode interfaces are subject to multicast flooding by default, and
are only removed from the multicast routing table when the router