Configuring A Static Connection To A Multicast Router; Enabling Igmp Immediate-Leave Processing - Cisco Catalyst 4500 Series Configuration Manual

Configuring IGMP Snooping
This example shows how to configure IP IGMP snooping to learn from CGMP self-join packets:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 1 mrouter learn cgmp
Switch(config)# end
Switch#

Configuring a Static Connection to a Multicast Router

To configure a static connection to a multicast router, enter the ip igmp snooping vlan mrouter
interface command on the switch.
To configure a static connection to a multicast router, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# ip igmp snooping vlan vlan_ID
mrouter interface interface_num
Step 3
Switch(config)# end
Step 4
Switch# show ip igmp snooping mrouter vlan vlan_ID
This example shows how to configure a static connection to a multicast router:
Switch# configure terminal
Switch(config)# ip igmp snooping vlan 200 mrouter interface fastethernet 2/10
Switch# show ip igmp snooping mrouter vlan 200
vlan
-----+----------------------------------------
200
Switch#

Enabling IGMP Immediate-Leave Processing

When you enable IGMP immediate-leave processing on a VLAN, a switch removes an interface from
the multicast group when it detects an IGMPv2 leave message on that interface.
For IGMPv3, immediate-leave processing is enabled by default with EHT.
Note
To enable immediate-leave processing on an IGMPv2 interface, perform this task:
Command
Switch(config)# ip igmp snooping vlan
vlan_ID immediate-leave
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
25-8
ports
Fa2/10
Chapter 25 Configuring IGMP Snooping and Filtering
Purpose
Enters global configuration mode.
Specifies a static connection to a multicast router for the
VLAN.
The interface to the router must be in the VLAN
Note
where you are entering the command. The router
and the line protocol must be up.
Exits configuration mode.
Verifies the configuration.
Purpose
Enables immediate-leave processing in the
VLAN.
Note This command applies only to IGMPv2
hosts.
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