Specifications

2-88

Catalyst 2950 and Catalyst 2955 Switch Command Reference

78-15304-01

Chapter 2 Cisco IOS Commands

ip igmp snooping vlan mrouter

Use the ip igmp snooping vlan mrouter global configuration command to add a multicast router port

and to configure the multicast router learning method. Use the no form of this command to remove the

configuration.

ip igmp snooping vlan vlan-id mrouter {interface interface-id | learn {cgmp | pim-dvmrp}}

no ip igmp snooping vlan vlan-id mrouter {interface interface-id | learn {cgmp | pim-dvmrp}}

Syntax Description

Defaults The default learning method is pim-dvmrp.

Command Modes Global configuration

Command History

Usage Guidelines The CGMP learning method is useful for controlling traffic in Cisco router environments.

The configured learning method is saved in nonvolatile RAM (NVRAM).

Static connections to multicast routers are supported only on switch ports.

Examples This example shows how to configure Fast Ethernet interface 0/6 as a multicast router port:

Switch(config)# ip igmp snooping vlan 1 mrouter interface fastethernet0/6

This example shows how to specify the multicast router learning method as CGMP:

Switch(config)# no ip igmp snooping vlan 1 mrouter learn cgmp

vlan vlan-id Specify the VLAN ID. The range is from 1 to 4094 when the

enhanced software image (EI) is installed and 1 to 1001 when the

standard software image (SI) is installed. Do not enter leading

zeros.

interface interface-id Specify the interface of the member port that is configured to a

static router port.

learn Specify the multicast router learning method.

cgmp Set the switch to learn multicast router ports by snooping on Cisco

Group Management Protocol (CGMP) packets.

pim-dvmrp Set the switch to learn multicast router ports by snooping on IGMP

queries and Protocol-Independent Multicasting-Distance Vector

Multicast Routing Protocol (PIM-DVMRP) packets.

Release Modification

12.0(5.2)WC(1) This command was first introduced.