Link aggregation groups the underlying ports into a single logical group. The aggregation uses these underlying ports exclusively and you cannot perform any other operation such as configuring VNICs or assigning IP addresses on these ports. However, you can configure VNICs on top of the aggregation and not on the individual ports.
You must remove any existing IP interface on these ports before creating the link aggregation.
You can also configure a VLAN and create VNICs over the link aggregation that you have created. For information about how to create VLANs over link aggregations, see How to Configure VLANs Over a Link Aggregation.