Configuring 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.

The following DHCP server options can be configured:

•

Select Enable Conflict Detection to turn on automatic DHCP scope conflict detection on each zone.

•

Compatible with Conflict Detection – Currently, the SonicWall DHCP server performs server-side conflict detection when this feature is enabled. The advantage of server-side conflict detection is that it detects conflicts even when the DHCP client does not run client-side conflict detection. However, if there are a lot of DHCP clients on the network, server-side conflict detection can result in longer waits for a full IP address allocation to complete.

•

Select Enable DHCP Server Network Pre-Discovery to have the DHCP server scan for other DHCP server networks. The following options can be modified to customize the performance of DHCP server network pre-discovery:

•

DHCP Server Conflict Detect Period—Sets how often the DHCP server scans for other networks. The default is 300 seconds.

•

Number of DHCP resources to discover—Sets the number of DHCP networks that are scanned for. The default is 10.

•

Timeout for conflicted resource to be rechecked—Sets the duration of time after which conflicted resources are re-checked. The default is 1800 seconds.

•

Timeout for available resource to be rechecked—Sets the duration of time after which available resources are re-checked. The default is 600 seconds.

NOTE: Conflict detection and network pre-discovery are not performed for an IP address which belongs to a “relayed” subnet scope. The DHCP server only performs a conflict detection ICMP check for a subnet range attached to its interface.

To configure Option Objects, Option Groups, and Trusted Agents, click the Advanced button. For detailed information on configuring these features, see Configuring Advanced DHCP Server Options.