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Configuring Switching Information
EdgeSwitch
™
Administration Guide
Ubiquiti Networks, Inc.
DHCP Snooping VLAN Configuration
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 (
Enabled
or
Disabled
) of DHCP snooping for the VLAN. Only VLANs
that are enabled for DHCP snooping appear in the list.
Use the buttons to perform the following tasks:
• To enable a VLAN for DHCP snooping, click
Add
and select the VLAN (press and hold CTRL to select
multiple VLANs). Then, click
Submit
to apply the changes.
• 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.
• Click
Refresh
to refresh the page with the most current data from the switch.
To retain the changes across the switch’s next power cycle, click
System
>
Configuration Storage
>
Save
.
DHCP Snooping Interface Configuration
Use this page to view and configure the DHCP snooping settings for each interface. The DHCP snooping
feature processes incoming DHCP messages. For DHCPRELEASE and DHCPDECLINE messages, the feature
compares the receive interface and VLAN with the client’s interface and VLAN in the binding database. If
the interfaces do not match, the application logs the event (when logging of invalid packets is enabled) and
drops the message. If MAC address validation is globally enabled, messages that pass the initial validation are
checked to verify that the source MAC address and the DHCP client hardware address match. Where there
is a mismatch, DHCP snooping logs the event (when logging of invalid packets is enabled) and drops the
packet. To change the DHCP Snooping settings for one or more interfaces, select each entry to modify and
click
Edit
. The same settings are applied to all selected interfaces.
To access the
DHCP Snooping Interface Configuration
page, click
Switching
>
DHCP Snooping
>
Base
>
Interface Configuration
in the navigation menu.