So I need to configure an NLB cluster for load balancing IIS. In my experience, I've set up NLB using exact duplicate servers in terms of hardware and sfotware. I've simply cloned the first IIS server and used that cloned image to install a second server and then create and configure the NLB cluster.
Is it absolutely necessary to have a clone for NLB? How different can the NLB cluster member servers be? Or how much the same must they be?
Running MS Windows Server 2003 32-bit on both servers. Wanted to upgrade to 2008 R2 but the sites that IIS hosts would fail.