Tuesday, January 20, 2009

Mac address conflicts

So it turns out some VMs have been assigned static MAC addresses already, so my script duplicated some MAC addresses in use. Not a huge deal (the network team bitched about some errors) until the following happened:

The SCCM guys assigned an image package via MAC address to those MAC addresses, and didn't restrict it to XP images. So the SCCM box re-imaged some windows 2003 boxes. Thank goodness we have vRanger in production, so the VMs were restored pretty quickly (save one, which errored out, and Vizioncore gave us a beta version which restored it).

I modified the script to use a range outside the first 256 addresses. Make sure you aren't conflicting if you use it, and make sure your imaging guys don't leave the package wide-open like ours did :).

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