ethtool version 2.6.33
Usage:
ethtool DEVNAME Display standard information about device
        ethtool -s|--change DEVNAME     Change generic options
                [ speed %d ]
                [ duplex half|full ]
                [ port tp|aui|bnc|mii|fibre ]
                [ autoneg on|off ]
                [ advertise %x ]
                [ phyad %d ]
                [ xcvr internal|external ]
                [ wol p|u|m|b|a|g|s|d... ]
                [ sopass %x:%x:%x:%x:%x:%x ]
                [ msglvl %d ]
        ethtool -a|--show-pause DEVNAME Show pause options
        ethtool -A|--pause DEVNAME      Set pause options
                [ autoneg on|off ]
                [ rx on|off ]
                [ tx on|off ]
        ethtool -c|--show-coalesce DEVNAME      Show coalesce options
        ethtool -C|--coalesce DEVNAME   Set coalesce options
                [adaptive-rx on|off]
                [adaptive-tx on|off]
                [rx-usecs N]
                [rx-frames N]
                [rx-usecs-irq N]
                [rx-frames-irq N]
                [tx-usecs N]
                [tx-frames N]
                [tx-usecs-irq N]
                [tx-frames-irq N]
                [stats-block-usecs N]
                [pkt-rate-low N]
                [rx-usecs-low N]
                [rx-frames-low N]
                [tx-usecs-low N]
                [tx-frames-low N]
                [pkt-rate-high N]
                [rx-usecs-high N]
                [rx-frames-high N]
                [tx-usecs-high N]
                [tx-frames-high N]
                [sample-interval N]
        ethtool -g|--show-ring DEVNAME  Query RX/TX ring parameters
        ethtool -G|--set-ring DEVNAME   Set RX/TX ring parameters
                [ rx N ]
                [ rx-mini N ]
                [ rx-jumbo N ]
                [ tx N ]
        ethtool -k|--show-offload DEVNAME       Get protocol offload information
        ethtool -K|--offload DEVNAME    Set protocol offload
                [ rx on|off ]
                [ tx on|off ]
                [ sg on|off ]
                [ tso on|off ]
                [ ufo on|off ]
                [ gso on|off ]
                [ gro on|off ]
                [ lro on|off ]
        ethtool -i|--driver DEVNAME     Show driver information
        ethtool -d|--register-dump DEVNAME      Do a register dump
                [ raw on|off ]
                [ file FILENAME ]
        ethtool -e|--eeprom-dump DEVNAME        Do a EEPROM dump
                [ raw on|off ]
                [ offset N ]
                [ length N ]
        ethtool -E|--change-eeprom DEVNAME      Change bytes in device EEPROM
                [ magic N ]
                [ offset N ]
                [ length N ]
                [ value N ]
        ethtool -r|--negotiate DEVNAME  Restart N-WAY negotation
        ethtool -p|--identify DEVNAME   Show visible port identification (e.g. blinking)
               [ TIME-IN-SECONDS ]
        ethtool -t|--test DEVNAME       Execute adapter self test
               [ online | offline ]
        ethtool -S|--statistics DEVNAME Show adapter statistics
        ethtool -n|--show-nfc DEVNAME   Show Rx network flow classificationoptions
                [ rx-flow-hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6 ]
        ethtool -f|--flash DEVNAME      FILENAME Flash firmware image from the specified file to a region on the device
               [ REGION-NUMBER-TO-FLASH ]
        ethtool -N|--config-nfc DEVNAME Configure Rx network flow classification options
                [ rx-flow-hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6 m|v|t|s|d|f|n|r... ]
        ethtool -h|--help               Show this help