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Chapter 48 IGMP Commands

IES-708-22A User’s Guide

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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

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