37-28
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL_28731-01
Chapter 37 Configuring IP Multicast
Configuration Examples
171.69.121.35 Serial0.33 * 8256/67052912
198.92.12.73 Serial0.1719 * 219444/862191
The following is sample output from the show ip pim interface command with a count when IP
multicast is enabled. The example lists the PIM interfaces that are fast-switched and process-switched,
and the packet counts for these. The H is added to interfaces where IP multicast is enabled.
Switch# show ip pim interface count
States: FS - Fast Switched, H - Hardware Switched
Address Interface FS Mpackets In/Out
192.1.10.2 Vlan10 * H 40886/0
192.1.11.2 Vlan11 * H 0/40554
192.1.12.2 Vlan12 * H 0/40554
192.1.23.2 Vlan23 * 0/0
192.1.24.2 Vlan24 * 0/0
Clearing Tables and Databases
You can remove all contents of a particular cache, table, or database. Clearing a cache, table, or database
might be necessary when the contents of the particular structure have become, or are suspected to be,
invalid.
To clear IP multicast caches, tables, and databases, enter one of these commands:
Note IP multicast routes can be regenerated in response to protocol events and as data packets arrive.
Configuration Examples
The following sections provide IP multicast routing configuration examples:
• PIM Dense Mode Example, page 37-28
• PIM Sparse Mode Example, page 37-29
• Bidirectional PIM Mode Example, page 37-29
• Sparse Mode with a Single Static RP Example, page 37-29
• Sparse Mode with Auto-RP: Example, page 37-30
PIM Dense Mode Example
This example is a configuration of dense-mode PIM on an Ethernet interface:
ip multicast-routing
interface ethernet 0
ip pim dense-mode
Command Purpose
Switch# clear ip mroute
Deletes entries from the IP routing table.
Switch# clear ip mfib counters
Deletes all per-route and global MFIB counters.
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