This returns nothing when the freshly rebuilt host is reattached to vCenter:
get-vmhost $vmhost | Get-VDSwitch
Making it appear that the host has no vDS config (which is true at this point)
Querying the switch tells a different tale:
Get-VDSwitch -Name $vDSName | get-vmhost
Name ConnectionState PowerState NumCpu CpuUsageMhz CpuTotalMhz MemoryUsageGB MemoryTotalGB Version
---- --------------- ---------- ------ ----------- ----------- ------------- ------------- -------
pbnesxt22.xxxxxxx... Connected PoweredOn 8 751 19200 15.982 71.990 5.0.0
pbnesxt21.xxxxxxx... Connected PoweredOn 8 40 19200 1.890 71.990 5.1.0
pbnesxt21 is the host I just rebuilt. remove-vdswitch doesn't work on it:
Get-VDSwitch -Name $vDSName | Remove-VDSwitchVMHost -VMHost $vmhost -confirm:$false
Remove-VDSwitchVMHost : 6/13/2013 2:25:43 PM Remove-VDSwitchVMHost VMHost 'pbnesxt21.xxxxxxxxx.pvt' is not a member of VDSwitch 'dvsQ92'
At line:1 char:31
+ Get-VDSwitch -Name $vDSName | Remove-VDSwitchVMHost -VMHost $vmhost -confirm:$fa ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Remove-VDSwitchVMHost], InvalidArgument
+ FullyQualifiedErrorId : VdsImpl_VDSwitchServiceImpl_VMHostNotAdded,VMware.VimAutomation.Vds.Commands.Cmdlets.RemoveVDSwitchVMHost