I was thinking about that too...but I dont have one of those at my disposal. I tried a NAS hard drive but that too played nice on my test network.
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IP conflict simulation
I am trying to figure out a good way to simulate an IP conflict. I have a specifc device that I think perminately drops offline when it detects an IP conflict on the network. I would like to create an IP conflict with the device on a test network. The problem is that when I set my test laptop (Running Windos XP SP3) to the same IP address it immeaditly detects the conflict and switches to DHCP. Is there a way to prevent XP from playing nice on the network and actually cause a conflict? I would like to try and avoid installing Windows 98 on a laptop/VM if possible.
(I think that the conflicting devices are printers that dont have the same built in "saftey" features that XP does)
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Answers
Which will detect the IP address conflict first? If the printer already has the IP address and you try to change your IP address in Windows to that IP address Windows will issue the warning but if you set the IP address in Windows FIRST and then boot up the printer will Windows still issue the warning or will the printer just see the IP address already taken and drop off the network like you are thinking? Just a thought if you haven't tried that way.
The devices we are worried about are usually set for DHCP. The issue comes in when a technician at a site installs a device (usually a printer/scanner) with a static IP but doesnt have the DHCP group create a reservation/exclustion. When the conflict occurs the device we are worried about usually drops off the network and the statically assigned device takes over. When the static device is taken off the network the DHCP device never seems to come back online unless it is rebooted.
I understand what you say, but I'm telling you to do it the right way. Instead of building a test network and creating IP conflicts, instruct the tehnician to configure the defice for dhcp, and after that make the reservation for that MAC address and IP.
If you want that device to have a specific IP (and some administrators usually want for easy management), get the MAC address of the device and make the reservation BEFORE installing the equipment. When the eqipment will be installed, set it for dhcp and it will always receive that address, and that address won't be assigned to any other equipment.
You'll never have IP conflicts if you do it like that.
Marius is right, but if you cant get MAC before installing , you can make on dhcp server , special group for unassigned MAC addresses (for security purposes you can add all this devices to some special VLAN to sepparate these from your LAN). And after technician install the device, you can move it to ordinary group.
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by: chuckyhPosted on 2009-01-13 at 12:01:37ID: 23366596
Do you have another printer you can setup with that ip? or maybe just an external print server, like a HP Jet Direct.