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3COM office Connect Block internet

Hi guys
I have a customer with a old Office Connect firewall with 25 licenses.
We just upgrade the network with a Windows 2008 SBS hyper V so we replace one server with 3 now adn there is 3 NIC cards on that new server. Now once a week the 3COM will block acess to the internet to laptops that connect in the mornig. When I look at the logs I see teh following message: "License exceeded: Connection dropped because too many IP addresses are in use on your LAN" If I reboot the firewall then it work fine.
There is only 12 machines plus the server that has 3 NIC so a total of 15 IP. Since it suppose to have 25 liceses why does it reach the limit?
It also say that is not register and I was thinking that can be also the cause but I register it on the 3com website under my account but I  have no registration code.
Any idea?
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Infedo
Asked:
Infedo
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1 Solution
 
jfradyCommented:
Could be wen you installed the new server(s) that you changed the DHCP lease time to a shorter interval.  If there are only 15 devices inside you shouldn't run into this issue.  Try changing DHCP lease to a week or more if you have a pretty static environment.
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InfedoAuthor Commented:
Are we talking about the Server DHCP or the 3 COM DHCP?
The 3 Com DHCP is disable.
I will look at the server DHCP lease time
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jfradyCommented:
The server DHCP.  I suspect the previous server had a longer DHCP lease time.  If your lease time is too short the Firewall will see more than one IP for each machine depending on it's timeout.  Again, if you have a static environment I would make your lease time at least a few weeks.  If you use the DHCP server in the firewall you likely wouldn't have this issue.
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InfedoAuthor Commented:
It was set to 8 days and I changed it to 30 days now
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JanScCommented:
Which version is installed, and please give me the 3com partnr or. 3Cxxxx number.
This problem might be solved in recent firmware
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