Edit vmkernel port MTU on distributed switches – using PowerCLI
According to the KB 1038827 “Enabling Jumbo Frames for VMkernel ports in a virtual distributed switch”, VMware says that you have to recreate the vmkernel port to set the MTU for jumbo frames. This is not true if you use powerCLI, I do not know exactly how it is done beneath the hood but it is very easy to configure using quite a few lines scripting.. By the way, there is no way in the GUI to edit this.
$cred = Get-Credential Connect-VIServer ESXhost.test.loc -credential $cred Get-VMHostNetworkadapter -name vmk2 | Set-VMHostnetworkadapter -Mtu 9000 Get-VMHostnetworkadapter -name vmk2 | ft Mtu
Setting the Mtu on the vmkernel port is basically not different using a standard vSwitch or a distributed vSwitch.
Of course you can connect to a vcenter and add a foreach loop to set the Mtu for more than one host vmkernel port.