Chelsio 420-CR showing 4 ports, which to use ?.

[RimBlock]

Hi,

I have just put a Chelsio T420-CR (dual SFP+ 10GbE nic) in my server being used for Pfsense and Pfsense is showing 4 ports available (2x CX and 2x NCX iirc).

Which ports should I assign (I am guessing not all 4) ?.

Thanks

[Guest]

Which ports should I assign (I am guessing not all 4) ?.

And why not all 4?