Solved ip address conflict in my network

Microsoft Microsoft windows server 2008...
January 20, 2014 at 03:09:17
Specs: Windows 7

we have two offices in a complex but in different buildings. office two is bridged to the main office via a radio (nanostation) for network and internet access. recently the router in office became faulty, we replaced it and now whenever i plug the cable connecting to the bridged network i get the ip address conflict error and lose all internet connection in both offices. i have tried to assign different addresses even those that are not in our ip address block and get the same problem. please assist.

i have a rough drawing of this network for better clarification, how can i attached this drawing?

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January 20, 2014 at 07:52:30
Let me see if I have this correct.

You have a bridged network between two buildings that is all one subnet. You replaced a router in one of the two buildings and whenever you plug the bridge cable into the new router, you get an IP conflict error.

I would start by tracing the dupe. Where is the device holding the IP? Where/what is the dupe? Is the device that's duping the new router? Is this IP statically assigned or DHCP? Once you know this information you can then work out from there.

Devices like routers, servers and printers should all have statically assigned IP's so as to avoid them ever having conflicts. I prefer to use IP's that are not in the DHCP scope for this. You can alternatively use reservations.

You will need to check your DHCP scope and all reservations/exclusions. Then check all statically assigned IP's starting with the router in the other building. Once you've done all the above, you can then statically assign an IP to the replacement router that isn't in the scope and doesn't conflict with any reservations/exclusions.

Just FYI, not capitalizing properly while you're typing makes it ever so much harder to read. Also, proper capitalization, spelling, grammar and punctuation shows professionalism and does not make you look like an illiterate buffoon.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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January 21, 2014 at 05:45:57
In the above scenario what is important is to get the link when configured.

Additional to what Curt R have commented, there supposed to be a WAN configuration in the A and B sides of the routers interfacing the two routers at both LAN to Radios communication.

I wish you the best.

IT SUPPORT, Union Trustees Limited
Lagos, Nigeria.
Founder of a proposed IT Hardware Service Company(Azedas Computer Technologies).

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January 21, 2014 at 10:56:16
✔ Best Answer
The most likely reason for this ip conflict is you are using the routers default lan subnet which is already being used at the remote site.

So if the remote sites lan is using subnet 192.168.1.x /24 you want the new routers lan to be 192.168.2.x /24

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