SonicWALL 5.8.1 Manuale Utente

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 avialable resources are re-checked. The default is 600 seconds.

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.