console#show bridge multicast address-table
Forbidden ports for multicast addresses:
When the video server sends multicast data to group 22.214.171.124, Port 1
participates and receives multicast traffic, but Port 2 does not participate
because it is a member of a different multicast group. Without IGMP
snooping, all ports that are members of VLAN 100 would be flooded with
traffic for all multicast groups, which would greatly increase the amount of
traffic on the switch.
In this example, ports 1, 2, 8, and 9 are connected to hosts that occasionally
request multicast data by sending IGMP join requests. These ports are
configured as MVR receiver ports so that they can be treated as members of
VLAN 99, the multicast VLAN, to receive multicast traffic.
Ports 1 and 2 are members of VLAN 10, and ports 8 and 9 are members of
VLAN 20. Port 24 connects the switch to the rest of the LAN, including the
The switch is configured to operate in MVR dynamic mode. This mode allows
port 24, the MVR source port, to dynamically join the multicast group by
sending an IGMP join message tagged with the MVR VLAN to the multicast
router. In MVR compatible mode, the source port does not send IGMP join
requests to the multicast router. When the switch operates in dynamic MVR
mode, the multicast router does not need to be statically configured on the
source port to receive the multicast data stream.
Configuring L2 Multicast Features