08-20-2013 12:19 AM
Palo Alto Networks firewalls have been designed to perform an Auto-Probe/Auto-Discovery when a DHCP server is configured in auto mode. The auto-probing detects existing DHCP servers in the same subnet. When another DHCP server is detected in the subnet, the firewall will shut down DHCP services and the other DHCP would gain/retain control.
Note: Auto-Probing cannot be turned-off and should not be mistaken for the "probe-ip" feature.
When the DHCP server in auto mode on the Palo Alto Networks firewall stops working due to the discovery of another DHCP server, the following message will appear in the System Log :
DHCP server auto-probe finished, turn off DHCP server since received offer from server 255.255.255.255 interface <DHCP Server Interface>
