18-11
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
78-14064-04
Chapter 18 Configuring IP Multicast Layer 3 Switching
Configuring IP Multicast Layer 3 Switching
This example shows how to enable PIM sparse mode on an interface:
Router(config-if)# ip pim sparse-mode
Router(config-if)#
Enabling IP Multicast Layer 3 Switching on Layer 3 Interfaces
IP multicast Layer 3 switching is enabled by default on the Layer 3 interface when you enable PIM on
the interface. Perform this task only if you disabled IP multicast Layer 3 switching on the interface and
you want to reenable it.
PIM can be enabled on any Layer 3 interface, including VLAN interfaces.
Note You must enable PIM on all participating Layer 3 interfaces before IP multicast Layer 3 switching will
function. For information on configuring PIM on Layer 3 interfaces, see the “Enabling IP PIM on
Layer 3 Interfaces” section on page 18-10.
To enable IP multicast Layer 3 switching on a Layer 3 interface, perform this task:
This example shows how to enable IP multicast Layer 3 switching on a Layer 3 interface:
Router(config-if)# mls ip multicast
Router(config-if)#
Configuring the Layer 3 Switching Global Threshold
You can configure a global multicast rate threshold, specified in packets per second, below which all
multicast traffic is routed by the MSFC, which prevents creation of switching cache entries for low-rate
Layer 3 flows.
Note This command does not affect flows that are already being routed. To apply the threshold to existing
routes, clear the route and let it reestablish.
To configure the Layer 3 switching threshold, perform this task:
Command Purpose
Step 1
Router(config)# interface {{vlan vlan_ID} |
{type
1
slot/port}}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Selects an interface to configure.
Step 2
Router(config-if)# mls ip multicast
Enables IP multicast Layer 3 switching on a Layer 3
interface.
Step 3
Router(config-if)# no mls ip multicast
Disables IP multicast Layer 3 switching on a Layer 3
interface.
Command Purpose
Router(config)# mls ip multicast threshold ppsec
Configures the IP MMLS threshold.
Router(config)# no mls ip multicast threshold
Reverts to the default IP MMLS threshold.
To Next Page
Loading...
Need help?
General
