Allied Telesis Support Portal

AT-GS950 and IGMP Snooping

How do I enable IGMP Snooping on an AT-GS950?

IGMP Snooping is disabled by default on the AT-GS950 series switches.

Without IGMP snooping, a switch floods multicast packets from all of its ports, except the port on which it received the packet. Such flooding of packets can negatively impact network performance.

To enable IGMP Snooping:
  1. From the main menu on the left side of the page, select the Bridge folder. The Bridge folder expands.
  2. From the Bridge folder, select IGMP Snooping. The IGMP Snooping Page is displayed.
  3. To enable or disable IGMP Snooping on the switch, selet Enable or Disable.
  4. To set the age-out timer, type the number of seconds you want the switch to wait before it purges an inactive dynamic MAC address. The range of this parameter is between 280 to 420 seconds.
  5. Click Apply.
  6. The IGMP Snooping Page is updated with active Multicast Group address(s).
  7. To display ports that are members of the multicast group address, click on the MAC address.
  8. From the main menu on the left side of the page, select Save Configuration to Flash to permanently save your changes.

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