Log entry: DHCP server auto-probe finished

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Log entry: DHCP server auto-probe finished

L5 Sessionator


At a customer DHCP server has suddenly stopped working. Log entry shows following info:

Type: dhcp

Severity: informational

Event: server-auto-probe-off

Description: DHCP server auto-probe finished, turn off DHCP server since received offer from server interface ethernet1/x

I was looking for event info but I couldn't find System Log document for PanOS 5.0 and such event doesn't exist in System Log document for PanOS 4.1.

Can anyone provide info about auto-probe service for DHCP? Any info what does this event mean?

I'm assuming that auto-probe service shut down the DHCP server because it received DHCP offer on this interface and assumed there is another DHCP server present for that network.

Best regards,



L1 Bithead

This doesn't match up with my experience. Once auto-probe starts up the DHCP service (no other DHCP servers seen), it appears that the firewall stops probing, and even if the other DHCP servers come back, the firewall DHCP server does NOT stop running. The only way (short of a reboot) I was able to get the DHCP server to go back to auto-probe after "turn on DHCP server since no offer received" was to use the command-line to force the server off and then back to auto:

set network dhcp interface ethernet1/2 server mode disabled
set network dhcp interface ethernet1/2 server mode auto

I've seen this behavior on a PA-200 with v6.1.5 and after upgrading to 7.0.4

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