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Chapter 13
Configuring CEF for PFC2 and PFC3A
To enable IP multicast routing globally on MSFC2/MSFC3, perform this task in global configuration
mode:
Task
Enable IP multicast routing globally.
This example shows how to enable IP multicast routing globally:
Router(config)# ip multicast-routing
Router(config)#
Enabling IP PIM on an MSFC2/MSFC3 Interface
You must enable PIM on MSFC2/MSFC3 interfaces before IP multicast will function on those
interfaces.
To enable IP PIM on an MSFC2/MSFC3 interface, perform this task in interface configuration mode:
Task
Enable IP PIM on an MSFC2/MSFC3
interface.
This example shows how to enable PIM on an MSFC2/MSFC3 interface using the default mode
(sparse-dense-mode):
Router(config-if)# ip pim
Router(config-if)#
This example shows how to enable PIM sparse mode on an MSFC2/MSFC3 interface:
Router(config-if)# ip pim sparse-mode
Router(config-if)#
Configuring the IP MMLS Global Threshold
You can configure a global multicast rate threshold, specified in packets per second, below which all
multicast traffic is routed by MSFC2/MSFC3. This prevents creation of MLS entries for short-lived
multicast flows, such as join requests.
This command does not affect flows that are already being routed. To apply the threshold to existing
Note
routes, clear the route and let it reestablish.
OL-8978-04
Command
Router(config)# ip multicast-routing
Command
Router(config-if)# ip pim {dense-mode | sparse-mode |
sparse-dense-mode}
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring CEF for PFC2/PFC3A on the Switch
13-19
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Troubleshooting
