IP Configuration
IPv4 Management and Interfaces
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STEP 1 Enable DHCP Snooping and/or DHCP Relay in the IP Configuration > DHCP >
Properties page or in the Security > DHCP Snooping > Properties page.
STEP 2 Define the interfaces on which DHCP Snooping is enabled in the IP Configuration
> DHCP > Interface Settings page.
STEP 3 Configure interfaces as trusted or untrusted in the IP Configuration > DHCP >
DHCP Snooping Interface page.
STEP 4 Optional. Add entries to the DHCP Snooping Binding database in the IP
Configuration > DHCP > DHCP Snooping Binding Database page.
DHCP Snooping/Relay
This section describes how the DHCP Relay and Snooping features are
implemented via the Web-based interface.

Properties

To configure DHCP Relay, DHCP Snooping and Option 82:
STEP 1 Click IP Configuration > IPv4 Management and Interfaces >
DHCP Snooping/Relay > Properties or Security > DHCP Snooping.
Enter the following fields:
•Option 82—Select Option 82 to insert Option 82 information into packets.
•DHCP Relay—Select to enable DHCP Relay.
•DHCP Snooping Status—Select to enable DHCP Snooping. If DHCP
Snooping is enabled, the following options can be enabled:
-

Option 82 Passthrough

—Select to leave foreign Option 82 information
when forwarding packets.
-

Verify MAC Address

—Select to verify that the source MAC address of
the Layer 2 header matches the client hardware address as appears in
the DHCP Header (part of the payload) on DHCP untrusted ports.
-

Backup Database

—Select to back up the DHCP Snooping Binding
database on the device’s flash memory.
-

Backup Database Update Interval

—Enter how often the DHCP Snooping
Binding database is to be backed up (if Backup Database is selected).