SFP supports 1Gb speed and SFP+ supports 10Gb speeds, and either of these 2 transceivers can be used on NPM96xx portsUnable to establish link between an SFP+ on the NPM-96xx and 1Gb port on the switch.
The NPM96xx provides flexibility to use any of the NPM ports at 1 Gigabit speed or 10 Gigabit speed based on the transceiver used on the NPM port
You can use an SFP fiber or an SFP+ fiber transceiver with NPM-96xx
The SFP transceiver only supports 1Gb speed
The SFP+ transceiver only supports 10Gb speed