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SonicOS Enhanced 4.0 Administrator Guide
How Does DHCP Server Persistence Work?
DHCP server persistence works by storing DHCP lease information periodically to flash
memory. This ensures that users have predicable IP addresses and minimizes the risk of IP
addressing conflicts after a reboot.
Enabling the DHCP Server
If you want to use the SonicWALL security appliance’s DHCP server, select Enable DHCP
Server on the Network > DHCP Server page.
Select Enable Conflict Detection to turn on automatic DHCP scope conflict detection on each
zone.
DHCP Server Lease Scopes
The DHCP Server Lease Scopes table displays the currently configured DHCP IP ranges. The
table shows:
• Type: Dynamic or Static
• Lease Scope: The IP address range, for example 172.16.31.2 - 172.16.31.254
• Interface: The Interface the range is assigned to--LAN, OPT, or WLAN
• Details: Detailed information about the lease, displayed as a tool tip when you hover the
mouse pointer over the Details icon
• Enable: Check the box in the Enable column to enable the DHCP range. Uncheck it to
disable the range
• Configure: Click the configure icon to configure the DHCP range