De-10 linux console image trouble with ethernet connexion


I’ve bought a de-10 nano kit , used the linux console sd image on the terasic site and i have some issues with ethernet connectivity.
At the boot the card is getting an IP address from my dhcp server but after that there is no way to ping the card nor ssh to it .
From the card it’s not possible to ping my gw .
I’ve run some wireshark trace and saw constantly arp request from the board to hosts in my network ; they reply to these requests but the arp table of the card is never filled.
Did someone already experience this behaviour ?
The version running is the 4.5.0-00185-g3bb556b

Thanks in advance,

try an static ip.