VLAN DHCP

Where should the gateway IP address and DHCP server be configured on a VLAN interface? The VLAN itself or a bridge that the VLAN is a port of? Currently I have both of them on a bridge, but I’m having some strange issues with a few clients renewing their leases in fairly short intervals, causing connectivity issues. Thanks.

This depends on what side of the VLAN interface is in the bridge.