IP addresses are important resources and must be carefully managed to avoid duplicated IP issues, which are sometimes very hard to troubleshoot. I still remember that it took a few of us couple of days to root cause a failing new feature, which worked sometimes and did not other times. Because it’s a new feature, we mostly thought it was somehow our bug in code. It turned out not, but caused by the vCenter we were testing actually used a duplicated IP address.
My company has created products like vSearch ("Super vCenter"), vijavaNG APIs, EAM APIs, ICE tool. We also help clients with virtualization and cloud computing on customized development, training. Should you, or someone you know, need these products and services, please feel free to contact me: steve __AT__ doublecloud.org.
Me: Steve Jin, VMware vExpert who authored the VMware VI and vSphere SDK by Prentice Hall, and created the de factor open source vSphere Java API while working at VMware engineering. Companies like Cisco, EMC, NetApp, HP, Dell, VMware, are among the users of the API and other tools I developed for their products, internal IT orchestration, and test automation.