i need NIM dual port gigabit Ethernet for ISR 4221 ?
Hi,
You can find the NIM modules for your 4221 here:-
What kind of NME?
NIM-ES2-4
This should meet your requirement for an ethernet port. You didn't say routed-port so I recommended just a layer 2 port.
Additional Notes - NIM-ES2-8
I am comparing the typical after-market pricing and it looks like the 4 and 8 port solutions are priced about the same so you may want to consider your pricing for the NIM-ES2-8.