Multicast Filtering3-1753CLI – This example shows that Port 11 has been statically configured as a portattached to a multicast router.Specifying Static Interfaces for a Multicast RouterDepending on your network connections, IGMP snooping may not always be able tolocate the IGMP querier. Therefore, if the IGMP querier is a known multicast router/switch connected over the network to an interface (port or trunk) on your switch, youcan manually configure the interface (and a specified VLAN) to join all the currentmulticast groups supported by the attached router. This can ensure that multicasttraffic 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 theattached multicast router.• Port or Trunk – Specifies the interface attached to a multicast router.Web – Click IGMP Snooping, Static Multicast Router Port Configuration. Specify theinterfaces attached to a multicast router, indicate the VLAN which will forward all thecorresponding multicast traffic, and then click Add. After you have finished addinginterfaces to the list, click Apply.Figure 3-101 Static Multicast Router Port ConfigurationCLI – This example configures port 11 as a multicast router port within VLAN 1.Console#show ip igmp snooping mrouter vlan 1 4-220VLAN M'cast Router Port Type---- ------------------ -------1 Eth 1/11 StaticConsole#Console(config)#ip igmp snooping vlan 1 mrouter ethernet 1/11 4-219Console(config)#exitConsole#show ip igmp snooping mrouter vlan 1 4-220VLAN M'cast Router Port Type---- ------------------ -------1 Eth 1/11 StaticConsole#
