Enabling it can only be done from the command line, and must be done for both the vSwitch and the VMkernel ports.

#Create vSwitch
esxcfg-vswitch -a vSwitch1

#Enable jumbo frames on switch
esxcfg-vswitch -m 9000 vSwitch1

#Add uplinks, aka physical NICs
esxcfg-vswitch -L vmnic4 vSwitch1

#Add VMkernel ports
esxcfg-vswitch -A VMkernel0 vSwitch1
esxcfg-vmknic -a -i 192.168.1.172 -n 255.255.0.0 -m 9000 VMkernel

su vswitch già creato

"Here's how I got it to work. My switch is vSwitch1 and my kernal port is VM-iSCSI"

esxcfg-vswitch -m 9000 vSwitch1

"** Delete the VMKernal port from the GUI"

esxcfg-vswitch -A "VM-iSCSI" vSwitch1

esxcfg-vmknic -a "VM-iSCSI" -i 192.168.1.49 -n 255.255.255.0 -m 9000