ZyXEL Communications IES-612-51A Guia do Utilizador descarregar pdf (Página 303)

Chapter 48 IGMP Commands

IES-612-51 User’s Guide

303

48.5 IGMP Count Limit Commands

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 an xDSL 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 xDSL connection.

48.5.1 IGMP Count Disable Command Example

The following command turns off the IGMP count limit for port 4.

48.5.2 IGMP Count Enable Command Example

The following command turns on the IGMP count limit for port 4.

48.5.3 IGMP Count Set Command Example

The following command sets a IGMP count limit of 2 for port 4.

Table 116 IGMP Count Limit Command Summary

COMMAND DESCRIPTION P

switch igmpsnoop igmpcount

disable <portlist>

Turns off the IGMP count limit for the specified xDSL port(s). H/H

switch igmpsnoop igmpcount

enable <portlist>

Turns on the IGMP count limit for the specified xDSL port(s). H/H

switch igmpsnoop igmpcount set

Sets the IGMP count limit for the specified xDSL port(s).

count: 0~16; the maximum number of IGMP groups

subscribers on the specified port(s) can join.

H/H

switch igmpsnoop igmpcount show

[portlist]

Displays the IGMP count limit setting status for the specified

xDSL port(s).

M/L

ras> switch igmpsnoop igmpcount disable 4

ras> switch igmpsnoop igmpcount enable 4

ras> switch igmpsnoop igmpcount set 4 2

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