Use the VLAN Configuration - Add page (Configuration > Wired > VLAN > Add) to create a VLAN and configure its parameters if you want to segment traffic on the network. To configure VLAN parameters:
In the IP address default gateway field, specify the gateway the controller should use to forward packets from wireless stations using this VLAN. The Default Gateway IP address should match the default gateway IP address configured (via either DHCP or statically) on wireless stations using this VLAN.
If the DHCP server is set to the default IP address of 127.0.0.1, DHCP packets pass through without modification. No DHCP relay function is performed. Instead, the packet is copied as is. This mode of operation is the default for a fresh system.