IP stops working from time to time

Posted by Mattias on Server Fault See other posts from Server Fault or by Mattias
Published on 2011-01-05T17:00:54Z Indexed on 2011/01/05 17:55 UTC
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Hi, have a problem that I can't seem to find the reason for.

We are running a small network with windows clients(XP/Win7) and windows servers(2008 sp2/2008r2). The domaincontroller is working as DC, DNS, DHCP, VPN. We have a Level1 FBR4000 between internet and our internal network.

The problem is that from time to time specific IP-adresses stops working, the only way I have gotten the devices to work again is to exclude the specific IP from the DHCP address pool and getting a new IP, then everything works again. It seems as the specific IP is beeing banned/blocked somewhere but I just can't figure out where.

Anyone got an idea as to where I should start to look?

I could also point out that I just reinstalled all servers due to a officemove and was hoping to get away from this problem but it just showed up again. This last time it was my iPhone that got stuck through the Wi-Fi...

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