Incorectly working network card

Hi, i try to install Haiku to computer with Gigabyte H61M-USB3H mainboard, but network card doesnt works correctly. Network connection is in cca 1 sec intervals connect and disconnect. this allways repeat.

the adapter is

Realtek GbE LAN chip (10/100/1000 Mbit)

any suggestions how fix it? i think is not problem on router side.

Here is item from listdev and ifconfig

Could possibly be

Welcome to the Haiku shell.

~> listdev