DHCP Snooping VLAN Configuration

Use the DHCP Snooping VLAN Configuration page to view and configure the DHCP (Dynamic Host Configuration Protocol) snooping settings on VLANs that exist on the device. DHCP snooping can be configured on switching VLANs and routing VLANs. For Layer 2 (non-routing) VLANs, DHCP snooping forwards valid DHCP client messages received on the VLANs. The message is forwarded on all trusted interfaces in the VLAN. When a DHCP packet is received on a routing VLAN, the DHCP snooping application applies its filtering rules and updates the bindings database. If a client message passes filtering rules, the message is placed into the software forwarding path, where it may be processed by the DHCP relay agent, the local DHCP server, or forwarded as an IP packet.

To access this page, click Switching > DCHP Snooping > Base > VLAN Configuration in the navigation menu.

Use the buttons to perform the following tasks:

To enable a VLAN for DHCP snooping, click Add and select the VLAN to administratively enable for DHCP snooping. To select multiple VLANs, [Ctrl] + click each VLAN to select.
To disable DHCP snooping on one or more VLANs, select each entry to delete and click Remove. You must confirm the action before the entry is deleted.

DHCP Snooping VLAN Configuration Fields

Field	Description
VLAN ID	The VLAN ID that is enabled for DHCP snooping. In the Add DHCP Snooping VLAN Configuration window, this field lists the VLAN ID of all VLANs that exist on the device.
DHCP Snooping Mode	The current administration mode of DHCP snooping for the VLAN. Only VLANs that are enabled for DHCP snooping appear in the list.