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I spent a large part of today trying to track down an IP conflict.
6 years ago we set up a computer to run an instrument, a job that that computer is still doing, and it was assigned an IP number by our DHCP system.
A few months ago the DHCP server somehow deregistered that computer and released its IP number into the available pool. The computer never noticed, because the tech that had set it up had set it up as a static IP, and it's failure to ever access the DHCP server may be what lead to the IP being deregistered.
Since last week, the DHCP system has tried to give me that same conflicted IP number for three different computer, and it hasn't worked for any of them, forcing me to assign a second IP to each of three computers and then delete the conflicted IP (the only way you can switch an IP number with this system).
Today I finally got around to requesting help on figuring it out. Three helpful people later (Dave, Bruce, and Dave), we figured it out and fixed all the IP registrations.
Not only was my instrumentation computer using that IP number but so was one of the network security guys' computers, who were using it for honey trapping, but who had forgotten to register it as well.
6 years ago we set up a computer to run an instrument, a job that that computer is still doing, and it was assigned an IP number by our DHCP system.
A few months ago the DHCP server somehow deregistered that computer and released its IP number into the available pool. The computer never noticed, because the tech that had set it up had set it up as a static IP, and it's failure to ever access the DHCP server may be what lead to the IP being deregistered.
Since last week, the DHCP system has tried to give me that same conflicted IP number for three different computer, and it hasn't worked for any of them, forcing me to assign a second IP to each of three computers and then delete the conflicted IP (the only way you can switch an IP number with this system).
Today I finally got around to requesting help on figuring it out. Three helpful people later (Dave, Bruce, and Dave), we figured it out and fixed all the IP registrations.
Not only was my instrumentation computer using that IP number but so was one of the network security guys' computers, who were using it for honey trapping, but who had forgotten to register it as well.
