On Jun 17, 2015, at 2:58 PM, Sergey Akhmatov wrote: > I've tried 10.1-RELEASE, then 10-STABLE and finaly 11-CURRENT with the same result. Sorry, in that case I don't know what it might be. Have you tried disabling "adapter intelligence"? rxcsum, txcsum, lro, etc? Borja.