Configuring A Multicast Router Port - Cisco Catalyst 2950 Software Configuration Manual

Chapter 16 Configuring IGMP Snooping and MVR
Beginning in privileged EXEC mode, follow these steps to configure the multicast router learning
method:
Command
Step 1
configure terminal
Step 2
ip igmp snooping vlan vlan-id mrouter
{interface interface-id} {learn {cgmp |
pim-dvmrp}}
Step 3
end
Step 4 show ip igmp snooping [vlan vlan-id]
Step 5 show ip igmp snooping mrouter [vlan vlan-id]
Step 6 copy running-config startup-config
This example shows how to configure IGMP snooping to use CGMP packets as the learning method:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 1 mrouter learn cgmp
Switch(config)# end
Switch# show ip igmp snooping vlan 1
vlan 1
----------
IGMP snooping is globally enabled
IGMP snooping is enabled on this Vlan
IGMP snooping immediate-leave is disabled on this Vlan
IGMP snooping mrouter learn mode is cgmp on this Vlan
To return to the default learning method, use the no ip igmp snooping vlan vlan-id mrouter learn cgmp
global configuration command.

Configuring a Multicast Router Port

To add a multicast router port (add a static connection to a multicast router), use the ip igmp snooping
vlan mrouter global configuration command on the switch.
78-11380-04
Purpose
Enter global configuration mode.
Specify the multicast router VLAN ID. For vlan-id, the range is
1 to 4094 when the enhanced software image is installed and
1 to 1005 when the standard software image is installed. Do not
enter leading zeros.
Specify the interface to the multicast router.
Specify the multicast router learning method:
• cgmp to specify listening for CGMP packets.
• pim-dvmrp to specify snooping PIM-DVMRP packets
Return to privileged EXEC mode.
Verify that IGMP snooping is enabled on the VLAN interface.
Display information on dynamically learned and manually
configured multicast router interfaces.
(Optional) Save your entries in the configuration file.
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring IGMP Snooping
16-7