I am able to log on directly to the ESX host but i only see the option to assign IP address to one adpater and not both.
If I am correct, you are able to see only one ip assignment from the DCUI console. This is by design. To have multiple management networks, you might need to log into the box by vsphere client either from one of the networks and create a new vswitch and have management network in the different ip range.