Multicast Filtering 3

Displaying Interfaces Attached to a Multicast Router

Multicast routers that are attached to ports on the switch use information obtained from IGMP, along with a multicast routing protocol such as DVMRP or PIM, to support IP multicasting across the Internet. These routers may be dynamically discovered by the switch or statically assigned to an interface on the switch.

You can use the Multicast Router Port Information page to display the ports on this switch attached to a neighboring multicast router/switch for each VLAN ID.

Command Attributes

•VLAN ID – ID of configured VLAN (1-4094).

•Multicast Router List – Multicast routers dynamically discovered by this switch or those that are statically assigned to an interface on this switch.

Web – Click IGMP Snooping, Multicast Router Port Information. Select the required VLAN ID from the scroll-down list to display the associated multicast routers.

Figure 3-96 Multicast Router Port Information

CLI – This example shows that Port 11 has been statically configured as a port attached to a multicast router.

Console#show

ip igmp snooping mrouter vlan 1

4-205

VLAN

M'cast

Router

Port

Type

 

----

------------------

-------

 

1

 

Eth

1/11

Static

 

Console#

3-163