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Duplicate IP Address

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Original Message
Name: jashcraft
Date: September 24, 2003 at 06:35:46 Pacific
Subject: Duplicate IP Address
OS: Windows 2000 Server
CPU/Ram: 2Ghz/1GB
Comment:

We've been experiencing a problem on multiple servers involving an IP address conflict. All of the servers have a static IP address. A window pops up stating that there is an IP address conflict. Upon reviewing the event log, it shows the same MAC address constantly conflicting. The problem seems to last about a day or two, then jumps to another server. What's the best way to solve this problem?


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Response Number 1
Name: ChrisE
Date: September 24, 2003 at 06:54:36 Pacific
Reply: (edit)

If its the same MAC address all the time, I would trace it back to the machine it is installed in and change the network card. It could be other problems, but the card is probably the culprit and is easy to rule out.
If you dont know which machine the MAC belongs to, download Angry IP Scanner or similar.
Good luck


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Response Number 2
Name: Rick
Date: September 24, 2003 at 12:53:22 Pacific
Reply: (edit)

When you get the msg, at a command prompt type netstat -n

it will reply with the offending machine and you can change it then.


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Response Number 3
Name: Rick
Date: September 24, 2003 at 12:54:36 Pacific
Reply: (edit)

Sorry the above is not correct, the correct command is

nbtstat -n not netstat, (getting my os's mixed up).


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Response Number 4
Name: jashcraft
Date: September 24, 2003 at 14:28:41 Pacific
Reply: (edit)

Thanks for the help! After a bit of looking, it turns out that a wireless access point was trying to give out ip addresses using our DHCP servers ip address as its own. This caused our DHCP server to go offline, and everyone that tried to get a legitimate address was denied. Thanks again for the help!


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Response Number 5
Name: scoura
Date: September 25, 2003 at 05:39:01 Pacific
Reply: (edit)

It's not often enough that someone takes the time to reply back to acknowledge a solution.


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Response Number 6
Name: waqar Rana
Date: September 29, 2003 at 17:51:47 Pacific
Reply: (edit)

Im am getting duplicate ip address in windows 2000 server and machine im running is windows XP amd MAC with OS 10. This is a new scope of range 192.168.0.0/16 but im not sure why i am getting bad address also im losing ip address in all MAC machines, which i have to renew every 2-3 hours but when i renew it wont give me any ip address but after a few seconds you get the ip address and then again this happens. Please see if someone can help me.


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