Steps to enable LACP on a Nexus device.
First the service/feature must be enabled (from config mode):
feature LACP
The interfaces can then be added to the port channel. In this case ports e1/1 and e1/2 will be added to the interface port-channel 1:
int e1/1
channel-group 1 mode active
int e1/2
channel-group 1 mode active
The relevant configuration can then be added to the port channel interface.