Rabbit 2000 ethernet port continuosly reset (link is intermitent) Howto fix it?

Link is intermitent when i connect a pc to the ethernet port

I would recommend reading the first few chapters of the TCPIP user guide, volume 1, at http://www.digi.com/support/productdetail?pid=5053&type=documentation.

Make sure your application is calling tcp_tick() often enough to service the TCPIP stack appropriately(every 50 ms or so should be good).