The DHCP Settings for the VLAN Interface is used to establish virtual networks in the Quadro's LAN or to integrate the Quadro into the corporate network's virtual LAN/WAN. DHCP service can be activated both on virtual LAN or WAN interfaces. VLAN is useful in corporate companies to divide large networks into groups and to have devices like Quadros and IP phones in each network separated (for example, to separate networks for data and voice transmission). Priorities may be assigned to the interfaces for packets prioritization.
With VLAN configuration, each virtual network will be characterized with a VLAN ID (tag). Packets addressed to that network will be checked towards the ID and if the ID number defined in the incoming packets matched the corresponding network's ID, the packets will be accepted. Otherwise, if the ID does not match, the packets will be dropped. In the same way, if the Quadro is integrated into the network that uses VLAN technology, outgoing packets should have the ID number of the corresponding virtual network, for the remote party to accept the packets from the Quadro.
The DHCP Settings for the VLAN Interface page contains a table with all enabled VLAN interfaces created in VLAN Settings page and the corresponding parameters (VLAN ID, IP Address Range and WINS Server). This page contains the following components:
Enable DHCP Server checkbox activates the DHCP server on Quadro for VLAN. With this checkbox enabled, Quadro will be able to assign dynamic IP addresses to the devices in its VLAN.
Following functional buttons are present:
VLAN Settings link moves to the page where virtual LAN/WAN interfaces may be created.