Dell M6220 User Configuration Manual page 726

Figure 25-10. Add VLAN Querier
2 Enter the VLAN ID and, if desired, an optional VLAN name.
3 Return to the VLAN Querier page and select the new VLAN from the
VLAN ID menu.
4 Specify the VLAN querier settings.
5 Click Apply.
The VLAN Querier settings are modified, and the device is updated.
726
Configuring L2 Multicast Features