Микроконтроллеры

Драйвер e1000 данные без флага EOP (end of packet) выбрасывает. Если нужны длинные пакеты, пользуйте jumbo. http://en.wikipedia.org/wiki/Jumbo_frame

 /* !EOP means multiple descriptors were used to store a single packet, if thats the case we need to toss it.  In fact, we
      * to toss every packet with the EOP bit clear and the next frame that _does_ have the EOP bit set, as it is by definition only a frame fragment */
     if(!(status & E1000_RXD_STAT_EOP))
        {e_dbg("rx packet consumed multiple buffers\n");
         continue;