found same problem on 2006.
http://forum.mikrotik.com/viewtopic.php?t=8793
no one reslove it ?Here is what I've found for Intel DUAL port Server Adapter PRO/1000MT
1. You can only use 1 port for GIGABIT
2. If you plug both port into Gigabit swicth, then speed down to 100 Mbps or stuck ( both port not working ).
3. This is happen NOT only in MikroTik, but also in FreeBSD
My suggestion :
1. DON'T BUY DUAL PORT INTEL SERVER ADAPTOR ( refund if you can and get exchange to 1 port )
2. Get 1 port Intel Server Adaptor
So.. since I can't refund the dual port, I use DUAL port with 1 port only for Gigabit connection
That's from my experience... hope this help
Last edited by oriondotnet on Thu Jun 08, 2006 11:45 am, edited 1 time in total.