ZyXEL Communications OLT-1308, Руководство пользователя, Страница: 150 / 314

Chapter 20 Multicast
OLT-1308 Series User’s Guide
150
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, a DSL 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 58 MVR Multicast Television Example
20.6 General MVR Configuration
Use the MVR screen to create multicast VLANs and select the receiver port(s) and a source
port for each multicast VLAN. Click Advanced Applications and Multicast in the navigation
panel. Click the Multicast Setting link and then the MVR link to display the screen as shown
next.
See
Section 20.5 on page 148 for background information.
"
You can create up to three multicast VLANs and up to 266 multicast rules on the
switch. Your switch automatically creates a static VLAN (with the same VID)
when you create a multicast VLAN in this screen.