IGMP Snooping Window

This window is only available for Catalyst 2950 and 3550 switches. It appears when you choose Device > IGMP Snooping on the menu bar. You can also click here to launch it.

The window has these tabs:

Before you make selections on the tabs, select a device from the Host Names list. All the choices you make on the tabs will apply to the selected device.

Settings

To change settings:

  1. The box Enable IGMP Snooping is checked by default. Uncheck it only if you want to disable IGMP snooping on the entire device.
  2. The table shows the VLANs that switch ports belong to and the settings for the VLANs. By default, IGMP snooping is enabled on the VLANs, the Immediate Leave feature is disabled, and the multicast router port learning method is PIM-DVMRP. To change any of these defaults, click Modify and use the Modify IGMP Snooping Settings window.
  3. When you return to the IGMP Snooping window, click OK.

Multicast Groups

To add a row to the list (VLAN, group MAC address, and router ports):

  1. Click Create.
  2. Use the Create Multicast Group window.
  3. When you return to the IGMP Snooping window, click OK.

To modify the Ports entry for a specific VLAN:

  1. Select the row containing the Ports entry that you want to modify.
  2. Click Modify and use the Modify Multicast Group window.
  3. When you return to the IGMP Snooping window, click OK.

Multicast Router Ports

To add a row (VLAN, multicast router ports):

  1. Click Create.
  2. Use the Create Multicast Router Ports window.
  3. When you return to the IGMP Snooping window, click OK.

To modify the Ports entry for a specific VLAN:

  1. Select the row for the VLAN that you want to modify.
  2. Click Modify and use the Modify Multicast Router Ports window.
  3. When you return to the IGMP Snooping window, click OK.