Windows Network Load Balancing on Imaged servers

Hi,

Having spent a most frustrating hour this afternoon trying to setup Windows Network Load Balancing (WNLB) on a VMware lab, I thought it might be useful to someone else to post the solution to my problem.

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I had setup the 2 servers identically (from the same cloned machine in VMware). I had then changed the SID and prepared the app (IIS SMTP server).

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I then setup the WNLB cluster on the first node and all was fine. Next I tried to add the 2nd node and now I faced a problem. It would simply not let me use the client accessible NIC (the first one in the machine). It presented the management NIC fine but not the client one.

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So, after testing all sorts of things I found this:

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http://support.microsoft.com/kb/828258

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Basically the error I got was

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“No interfaces are available for installing a new cluster”

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It turns out that because I cloned the machine, they have the same Network card GUID in the registry which means WNLB can’t add the main duplicate NIC to the cluster.

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To solve the problem, I uninstalled the NIC and installed another one which rectified the problem.

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Hope that saves someone else the time.

Cheers

Nathan