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Depending on your network connections, IGMP snooping may not always be
able to locate the IGMP querier. Therefore, if the IGMP querier is a known multi-
cast router/switch connected over the network to an interface (port or trunk) on
your switch, you can manually configure that interface to join all the current multi-
cast groups. This can ensure that multicast traffic is passed to all the appropriate
interfaces within the switch.
Command Attributes
> Interface – Activates the Port or Trunk scroll down list.
> VLAN ID – Selects the VLAN to propagate all multicast traffic coming from the
attached multicast router/switch.
> Port or Trunk – Specifies the interface attached to a multicast router.
Web – Click IGMP/Static Multicast Router Port Configuration. Specify the inter-
faces attached to a multicast router, indicate the VLAN which will forward all the
corresponding multicast traffic, and then click “Add.” After you have completed
adding interfaces to the list, click “Apply.”
CLI – This example configures port 11 as a multicast router port within VLAN 1.
Console(config)#ip igmp snooping vlan 1 mrouter ethernet 1/11
3-115
Console(config)#exit
Console#show ip igmp snooping mrouter vlan 1
3-116
VLAN M'cast Router Port Type
---- ------------------ -------
1 Eth 1/11 Static
96
