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IGMP Multicast Group Information
To display multicast group and router port information, click Configuration, IGMP Snooping, Multicast Entry
Table.
The IGMP Multicast Router Information table displays the current multicast groups learned through IGMP
Snooping. 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. You can
use the IGMP Multicast Router Information table to see which ports on the switch are attached to a neighboring
multicast router.
Figure 16: Multicast Entry Table
Hint§
The following parameters are shown on the Multicast Entry Table page:
■ VID - A VLAN on the switch that is forwarding multicast traffic to downstream ports for the specified
multicast group address.
■ VLAN Name – The name of the VLAN on the switch that is forwarding multicast traffic.
■ Source IP - The IP address of one of the multicast servers transmitting traffic to the specified group.
■ Group Address – IP multicast group address with subscribers directly attached or downstream from the switch,
or a static multicast group assigned to this interface.
■ Member Port – An downstream port that is receiving traffic for the specified multicast group.
■ Dynamic Router Port – The port interfaces dynamically discovered by the switch to be attached to Multicast
routers.