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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 configure the Layer 3 switching threshold to 10 packets per second:
Router(config)# mls ip multicast threshold 10
Router(config)#
Enabling Installation of Directly Connected Subnets
In PIM sparse mode, a first-hop router that is the designated router for the interface may need to
encapsulate the source traffic in a PIM register message and unicast it to the rendezvous point. To prevent
new sources for the group from being learned in the routing table, the (*,G) flows should remain as
completely hardware-switched flows. (subnet/mask, 224/4) entries installed in the hardware FIB allows
both (*,G) flows to remain completely hardware-switched flows, and new, directly connected sources to
be learned correctly. Installing of directly connected subnets is enabled globally by default. One
(subnet/mask, 224/4) is installed per PIM-enabled interface.
To view FIB entries, enter the show mls ip multicast connected command.
To enable installation of directly connected subnets, perform this task:
This example shows how to enable installation of directly connected subnets:
Router(config)# mls ip multicast connected
Router(config)#
Enabling NetFlow-Based Rate Limiting of RPF Failures
You can enable NetFlow-based rate limiting of RPF failures globally and on a per-Layer 3 interface
basis. When enabled on a global level, the feature is automatically enabled on all eligible Layer 3
interfaces.
Note To enable NetFlow-based rate limiting of RPF failures on a PFC2, you must first disable CEF-based rate
limiting of RPF failures, which is enabled by default.
To enable NetFlow-based rate limiting of RPF failures, perform this task:
Command Purpose
Router(config)# mls ip multicast connected
Enables installation of directly connected subnets.
Router(config)# no mls ip multicast connected
Disables installation of directly connected subnets.
Command Purpose
Step 1
Router(config)# mls ip multicast non-rpf netflow
Enables NetFlow-based rate limiting of RPF failures
globally.
Router(config)# no mls ip multicast non-rpf
netflow
Disables NetFlow-based rate limiting of RPF failures
globally.
Step 2
Router(config)# interface {{vlan vlan_ID} |
{type
1
slot/port} | {port-channel channel_ID}}
Selects the Layer 3 interface to be configured.
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