Nexus 9396PX Data centre switch not booting.

Nexus 9300 switches are not loading with code  and getting the below error.
Loader> prompt and i tried with boot command and no luck.
Do we need crossover cable for netboot from tftp server?
Configured the IP setting in the nexus through Set command.
PC-------------Nexus9300(mgmt0) port.

Thanks Colin,
I was thinking towards a 6500
For a small setup with currently about 20 clients, and looking towards increasing that to about 50 in the next year, would a single / pair of 6500's be a suitable core.
Is there any benefit in setting up an MPLS core with routers etc, I have done it in labs but can't see how to scale it for a real world implementation.
I am thinking the VRF separation on the 6500 is going to be sufficient and forget MPLS?
Roger

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