--- sys/dev/e1000/if_igb.h.orig 2014-10-12 13:20:23.000000000 +0600 +++ sys/dev/e1000/if_igb.h 2015-10-01 21:16:03.119032826 +0500 @@ -237,9 +237,9 @@ /* Offload bits in mbuf flag */ #if __FreeBSD_version >= 800000 -#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP) +#define CSUM_OFFLOAD (CSUM_TCP|CSUM_UDP|CSUM_SCTP) #else -#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP) +#define CSUM_OFFLOAD (CSUM_TCP|CSUM_UDP) #endif /* Define the starting Interrupt rate per Queue */