Chapter 23 Multicast
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matches one of the configured MVR multicast group addresses on the Switch, an
entry is created in the forwarding table on the Switch. This maps the subscriber
VLAN to the list of forwarding destinations for the specified multicast traffic.
When the subscriber changes the channel or turns off the computer, an IGMP
leave message is sent to the Switch to leave the multicast group. The Switch
sends a query to VLAN 1 on the receiver port (in this case, an uplink port on the
Switch). If there is another subscriber device connected to this port in the same
subscriber VLAN, the receiving port will still be on the list of forwarding destination
for the multicast traffic. Otherwise, the Switch removes the receiver port from the
forwarding table.
Figure 99 MVR Multicast Television Example
23.2 Multicast Status
Click Advanced Applications > Multicast to display the screen as shown. This
screen shows the multicast group information. See Section 23.1 on page 191 for
more information on multicasting.
Figure 100 Advanced Application > Multicast
The following table describes the labels in this screen.
Table 53 Advanced Application > Multicast Status
LABEL DESCRIPTION
Index This is the index number of the entry.
VID This field displays the multicast VLAN ID.
Port This field displays the port number that belongs to the multicast group.
Multicast Group This field displays IP multicast group addresses.
