PA-500, PANOS 4.0.5, DHCP set to "auto", lease time all zeros, one IP pool (192.168.2.2-192.168.2.126) .
Recently I noticed that I was getting duplicate IP messages from Windows computers on my network. I found that certain devices were geting the same IP. I found that when plugging in two devices both got the same IP address.
Has anyone else seen this? It appears that a lease time of zero started behaving like a lease time of zero instead of unlimited. I have another PA-500 configured the same way with no problems.
Setting a lease time fixed my problem, but I'm curious why after more than a year of use the behavior would change, and why my other PA-500 behaves differently.
No upgrade, before I noticed the behavior. I was running 4.0.2 since its release date (4/11) and only started seeing the behavior in the past month. I downloaded and installed 4.0.5 with no change.
Normally I have fewer than 20 devices. I used the command line to clear all leases, and tested it with a network consisting of one switch and two devices, both devices got the same address.
I have a customer which complains the same problem in a 4.0.5 box. An interface dedicated to Wifi guest access.
He complains to have some machine with IP address in conflict and the following error in the PAN system log:
SYSTEM ALERT : medium : ip address is already in use ip x.x.x.x interface ethernet1/3
The lease configured is 4 hours.
Have you fixed that issue or is a bug?
Thank you and regards.
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