I don't really understand.
(Aruba7010) (config-mgmt)#ip address X.X.X.X ?
<ipmask> A.B.C.D IP subnet mask
I must enter a subnet mask according to this output.
Is there a guide which explains the role of mgmt port.
I know i can use an other interface with a specific address and subnet mask to reach controller.
In this case , what s the purpose of mgmt port ?
I think you do a mix up with loopback interface which doesn't need subnet mask :
(Aruba7010) (config-loop)#ip address X.X.X.X ?
<cr>