what is the versions of ESXi hosts.
do you have multiple physical nics on the ESXi hosts.. may be one in spare to use in standard switch?
if it is not an issues I would suggest you to specify vLANs you currently ate and the vLANs you want to move to.. we dont want the discussion to get confusing.
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Regards,
Hussain
https://virtualcubes.wordpress.com/
