Guest North Coast Sea Foods Posted July 10, 2007 Posted July 10, 2007 On occasion I am getting an IP Address Conflict message. What is the best way to identify where this is coming from? thx
Guest SBS Rocker Posted July 10, 2007 Posted July 10, 2007 Re: IP Address Confilict ping -a xxx.xx.xx.xxx or check you DNS records. "North Coast Sea Foods" <jleonard@northcoastseafoods.com> wrote in message news:enDkzkxwHHA.4568@TK2MSFTNGP03.phx.gbl... > On occasion I am getting an IP Address Conflict message. > > What is the best way to identify where this is coming from? > > thx > >
Guest TuxEdu Posted July 10, 2007 Posted July 10, 2007 Re: IP Address Confilict On Jul 10, 12:40 pm, "North Coast Sea Foods" <jleon...@northcoastseafoods.com> wrote: > On occasion I am getting an IP Address Conflict message. > > What is the best way to identify where this is coming from? > > thx Try using nslookup XX.XX.XXX.XXX
Guest Todd H. Posted July 10, 2007 Posted July 10, 2007 Re: IP Address Confilict "North Coast Sea Foods" <jleonard@northcoastseafoods.com> writes: > On occasion I am getting an IP Address Conflict message. > > What is the best way to identify where this is coming from? Event logs on the machine throwing the message might tell you the mac address or name of the conflicting device. Or arp -a will dump the arp table of your machine and tell you the MAC of the machine that also has that IP. Then, from the MAC address you might be able to divine the vendor of the network device and narrow things down from there. Then it's a linear search, checking all your machines.. and that's not terribly productive or fun. But you're learning why a managed switch is a nice thing to have. :-) The best way to chase this down is on your network switch. On a proper managed switch (hopefully you have one), dupe ip's should be reported and you'll have port numbers you can go and follow to the offending party. Dump the address table and it should tell you. Absent a managed switch though, a manual method of doing this would be to jack into your switch with a laptop using a good non conflicting IP on the subnet, unplug every other cable except your line from the switch, ping -t the offending address, replug wires until you get a response. Repeat if your first hit was the server that reported the duplicate to ya. On a related note, if your environment is using DHCP, and if the dupe IP address in the dhcp scope range? You can check the lease list and see the MAC of what should have that address, then go about chasing down what other machine is using that address. No one should be assigning themselves static IP's within the DHCP scope. Good luck. Best Regards, -- Todd H. http://www.toddh.net/
Guest Brad Tiede Posted July 20, 2007 Posted July 20, 2007 Mystery Duplicate IP address Mystery Duplicate IP address Ok... here's a related question then. I've got a 2003 server that claims it has a duplicate IP address, but never loses connection. I checked for the MAC of the culprit in the Event Log and it shows 00:00:00:00. I can ping the address with the server up, unplug the server and the pings time out. Any ideas? EggHeadCafe.com - .NET Developer Portal of Choice http://www.eggheadcafe.com
Guest Greg O Posted July 23, 2007 Posted July 23, 2007 Re: Mystery Duplicate IP address Re: Mystery Duplicate IP address <Brad Tiede> wrote in message news:200772016313btd@hamilton.net... > Ok... here's a related question then. I've got a 2003 server that claims > it has a duplicate IP address, but never loses connection. I checked for > the MAC of the culprit in the Event Log and it shows 00:00:00:00. I can > ping the address with the server up, unplug the server and the pings time > out. > > Any ideas? > > EggHeadCafe.com - .NET Developer Portal of Choice > http://www.eggheadcafe.com You could check DNS to see if the other computer has registered its name with the IP address, that will tell you which computer is is perhaps.
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