Sniffer server howto ?

Hello, anybody can explain me a litle bit how to configure a sniffer capture server? any guide?

Thanks a lot!

What is your goal?

If you like to get a copy of all packed, you can setup port mirror (if your device support it) and send all data to a windows pc with Wire Shark

Info on port mirror.
http://forum.mikrotik.com/t/port-mirroring/29949/1