ZyXEL Communications IES-708-22A - Manual (Page 306)

Chapter 48 IGMP Commands
IES-708-22A User’s Guide
306
48.6 IGMP Count Limit Commands
This feature is available in STU-C mode only.
Use these commands 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.
48.6.1 IGMP Count Disable Command
Syntax:
ras> switch igmpsnoop igmpcount disable <portlist>
where
This command turns off the IGMP count limit for the specified DSL port(s).
The following command turns off the IGMP count limit for port 4.
48.6.2 IGMP Count Enable Command
Syntax:
ras> switch igmpsnoop igmpcount enable <portlist>
where
This command turns on the IGMP count limit for the specified DSL port(s).
The following command turns on the IGMP count limit for port 4.
<portlist> = You can specify a single DSL port <1>, all DSL ports <*> or a
list of DSL ports <1,3,5>. You can also include a range of ports
<1,5,6~8>.
ras> switch igmpsnoop igmpcount disable 4
<portlist> = You can specify a single DSL port <1>, all DSL ports <*> or a
list of DSL ports <1,3,5>. You can also include a range of ports
<1,5,6~8>.
ras> switch igmpsnoop igmpcount enable 4