Chapter 23 Multicast
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. |
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VID | This field displays the multicast VLAN ID. |
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Port | This field displays the port number that belongs to the multicast group. |
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Multicast Group | This field displays IP multicast group addresses. |
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194 |
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