I found a similar references to it being discovered from broadcast traffic here: http://www.vmware.com/community/thread.jspa?messageID=480240 and http://www.vmware.com/community/click.jspa?searchID=2392130&messageID=523483. Are those the threads you were referring to? If not, I would be interested in the link.

I haven't been able find the info using esxcfg-vswitch, nics, etc - perhaps an undocumented switch? ;o) Although I haven't searched in there yet, it just occurred to me that it is probably in the VC DB somewhere as well. That might work but I am hoping to find it somewhere as output to a command or in /proc or something written by vpxa perhaps?

Thanks for the responses!!

Mike