ZyXEL Communications IES-708-22A - Manual (Page 153)

Chapter 18 IGMP
IES-708-22A User’s Guide
153
18.6 IGMP Filter Setup Screen
This feature is available in STU-C mode only.
To open this screen, click Advanced Application > IGMP > Filter Setup. This screen is
discussed in
Section 14.9 on page 119 .
18.7 IGMP Count Screen
This feature is available in STU-C mode only.
Use this screen to limit the number of IGMP groups a subscriber on a port can join. This
allows you to control the distribution of multicast services (such as content information
distribution) based on service plans and types of subscription.
IGMP count is useful for ensuring the service quality of high bandwidth services like video or
Internet Protocol television (IPTV). IGMP count can limit how many channels (IGMP groups)
the subscriber connected to a DSL port can use at a time. If each channel requires 4~5 Mbps of
download bandwidth, and the subscriber’s connection supports 11 Mbps, you can use IGMP
count to limit the subscriber to using just 2 channels at a time. This also effectively limits the
subscriber to using only two IPTVs with the DSL connection.
To open this screen, click Advanced Application > IGMP > Count Setup.
IGMP Mode (STU-R mode only)
Select Enable to have the device use IGMP snooping.
Select Disable to have the device not use IGMP snooping.
(STU-C mode only)
Select Proxy to have the device use IGMP proxy.
Select Snooping to have the device passively learn multicast groups.
Select Disable to have the device not use either IGMP proxy or snooping.
Apply Click Apply to save your IGMP mode settings.
Clicking Apply saves your changes to the IES-708-22A’s volatile memory. The
IES-708-22A loses these changes if it is turned off or loses power, so use the
Config Save link on the navigation panel to save your changes to the non-
volatile memory when you are done configuring.
Table 39 Advanced Application > IGMP > IGMP Setup (continued)
LABEL DESCRIPTION