/usr/local/fop2/fop2_server --register showing below error
eth0: error fetching interface information: Device not found
FOP2 was unable to find an eth0 interface to bind the license to.
Please specify a valid NIC name with the -i command line parameter, for example:
/usr/local/fop2/fop2_serve --register -i eth1
Ethernet port is em1
and licence was updated in 2016