NAME

       ethtool - Display or change ethernet card settings

SYNOPSIS

       ethtool ethX

       ethtool -h|--help

       ethtool -a|--show-pause ethX

       ethtool -A|--pause ethX [autoneg on|off] [rx on|off] [tx on|off]

       ethtool -c|--show-coalesce ethX

       ethtool  -C|--coalesce  ethX  [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 ethX

       ethtool -G|--set-ring ethX [rx N] [rx-mini N] [rx-jumbo N] [tx N]

       ethtool -i|--driver ethX

       ethtool -d|--register-dump ethX [raw on|off] [hex on|off] [file name]

       ethtool -e|--eeprom-dump ethX [raw on|off] [offset N] [length N]

       ethtool -E|--change-eeprom ethX [magic N] [offset N] [value N]

       ethtool -k|--show-offload ethX

       ethtool   -K|--offload   ethX   [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 -p|--identify ethX [N]

       ethtool -r|--negotiate ethX

       ethtool -S|--statistics ethX

       ethtool -t|--test ethX [offline|online]

       ethtool   -s   ethX  speed N  [duplex half|full]  [port tp|aui|bnc|mii]
       [autoneg on|off]  [advertise  N]  [phyad  N]   [xcvr internal|external]
       [wol p|u|m|b|a|g|s|d...]  [sopass xx:yy:zz:aa:bb:cc] [msglvl N]

       ethtool -n ethX [rx-flow-hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6]

       ethtool  -N  ethX [rx-flow-hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6
        p||v|t|s|d|f|n|r...]

DESCRIPTION

       ethtool is used  for  querying  settings  of  an  ethernet  device  and
       changing them.

       ethX  is  the  name  of  the  ethernet  device  on which ethtool should
       operate.

OPTIONS

       ethtool with a  single  argument  specifying  the  device  name  prints
       current settings of the specified device.

       -h --help
              Shows a short help message.

       -a --show-pause
              Queries  the  specified  ethernet  device  for  pause  parameter
              information.

       -A --pause
              Changes the pause parameters of the specified ethernet device.

       autoneg on|off
              Specifies whether pause autonegotiation should be enabled.

       rx on|off
              Specifies whether RX pause should be enabled.

       tx on|off
              Specifies whether TX pause should be enabled.

       -c --show-coalesce
              Queries   the   specified   ethernet   device   for   coalescing
              information.

       -C --coalesce
              Changes  the  coalescing  settings  of  the  specified  ethernet
              device.

       -g --show-ring
              Queries the specified ethernet device for rx/tx  ring  parameter
              information.

       -G --set-ring
              Changes  the  rx/tx  ring  parameters  of the specified ethernet
              device.

       rx N   Changes the number of ring entries for the Rx ring.

       rx-mini N
              Changes the number of ring entries for the Rx Mini ring.

       rx-jumbo N
              Changes the number of ring entries for the Rx Jumbo ring.

       tx N   Changes the number of ring entries for the Tx ring.

       -i --driver
              Queries the specified  ethernet  device  for  associated  driver
              information.

       -d --register-dump
              Retrieves  and prints a register dump for the specified ethernet
              device.  The register format  for  some  devices  is  known  and
              decoded  others  are  printed in hex.  When raw is enabled, then
              ethtool dumps the raw register  data  to  stdout.   If  file  is
              specified,  then  use  contents  of  previous raw register dump,
              rather than reading from the device.

       -e --eeprom-dump
              Retrieves and prints an EEPROM dump for the  specified  ethernet
              device.   When raw is enabled, then it dumps the raw EEPROM data
              to stdout.  The  length  and  offset  parameters  allow  dumping
              certain  portions  of the EEPROM.  Default is to dump the entire
              EEPROM.

       -E --change-eeprom
              Changes EEPROM byte for the specified ethernet  device.   offset
              and value specify which byte and it's new value.  Because of the
              persistent nature of writing to the  EEPROM,  a  device-specific
              magic key must be specified to prevent the accidental writing to
              the EEPROM.

       -k --show-offload
              Queries the specified ethernet device for offload information.

       -K --offload
              Changes the offload parameters of the specified ethernet device.

       rx on|off
              Specifies whether RX checksumming should be enabled.

       tx on|off
              Specifies whether TX checksumming should be enabled.

       sg on|off
              Specifies whether scatter-gather should be enabled.

       tso on|off
              Specifies whether TCP segmentation offload should be enabled.

       ufo on|off
              Specifies whether UDP fragmentation offload should be enabled

       gso on|off
              Specifies whether generic segmentation offload should be enabled

       gro on|off
              Specifies whether generic receive offload should be enabled

       lro on|off
              Specifies whether large receive offload should be enabled

       -p --identify
              Initiates adapter-specific action intended to enable an operator
              to  easily  identify  the  adapter  by  sight.   Typically  this
              involves blinking one or more  LEDs  on  the  specific  ethernet
              port.

       N      Length of time to perform phys-id, in seconds.

       -r --negotiate
              Restarts  auto-negotiation  on the specified ethernet device, if
              auto-negotiation is enabled.

       -S --statistics
              Queries the specified  ethernet  device  for  NIC-  and  driver-
              specific statistics.

       -t --test
              Executes  adapter  selftest  on  the  specified ethernet device.
              Possible test modes are:

       offline|online
              defines test type: offline (default) means to perform  full  set
              of  tests  possibly causing normal operation interruption during
              the tests, online means to perform limited set of tests  do  not
              interrupting normal adapter operation.

       -s --change
              Allows  changing  some or all settings of the specified ethernet
              device.  All following options only apply if -s was specified.

       speed N
              Set speed in Mb/s.  ethtool with just  the  device  name  as  an
              argument will show you the supported device speeds.

       duplex half|full
              Sets full or half duplex mode.

       port tp|aui|bnc|mii
              Selects device port.

       autoneg on|off
              Specifies    whether    autonegotiation   should   be   enabled.
              Autonegotiation is enabled  by  deafult,  but  in  some  network
              devices  may  have  trouble  with  it,  so you can disable it if
              really necessary.

       advertise N
              Sets the speed and duplex advertised  by  autonegotiation.   The
              argument  is  a  hexidecimal value using one or a combination of
              the following values:
              0x001    10 Half
              0x002    10 Full
              0x004    100 Half
              0x008    100 Full
              0x010    1000 Half(not supported by IEEE standards)
              0x020    1000 Full
              0x8000   2500 Full(not supported by IEEE standards)
              0x1000   10000 Full
              0x03F    Auto

       phyad N
              PHY address.

       xcvr internal|external
              Selects transceiver type. Currently only internal  and  external
              can be specified, in the future further types might be added.

       wol p|u|m|b|a|g|s|d...
              Sets  Wake-on-LAN  options.   Not all devices support this.  The
              argument to this option is a  string  of  characters  specifying
              which options to enable.
              p  Wake on phy activity
              u  Wake on unicast messages
              m  Wake on multicast messages
              b  Wake on broadcast messages
              a  Wake on ARP
              g  Wake on MagicPacket(tm)
              s  Enable SecureOn(tm) password for MagicPacket(tm)
              d  Disable  (wake  on nothing).  This option clears all previous
                 options.

       sopass xx:yy:zz:aa:bb:cc
              Sets the SecureOn(tm) password.  The  argument  to  this  option
              must be 6 bytes in ethernet MAC hex format (xx:yy:zz:aa:bb:cc).

       msglvl N
              Sets the driver message level. Meanings differ per driver.

       -n --show-nfc
              Retrieves    the    receive    network    flow    classification
              configurations.

       rx-flow-hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6
              Retrieves the hash options for  the  specified  network  traffic
              type.
              tcp4    TCP over IPv4
              udp4    UDP over IPv4
              ah4     IPSEC AH/ESP over IPv4
              sctp4   SCTP over IPv4
              tcp6    TCP over IPv6
              udp6    UDP over IPv6
              ah6     IPSEC AH/ESP over IPv6
              sctp6   SCTP over IPv6

       -N --config-nfc
              Configures the receive network flow classification.

       rx-flow-
       hash tcp4|udp4|ah4|sctp4|tcp6|udp6|ah6|sctp6 p||v|t|s|d|f|n|r...
              Configures the hash options for the  specified  network  traffic
              type.
              p  Hash  on  the  device  port  number  on  which the packet was
                 received.
              m  Hash on the Layer 2 destination address of the rx packet.
              v  Hash on the VLAN tag of the rx packet.
              t  Hash on the Layer 3 protocol field of the rx packet.
              s  Hash on the IP source address of the rx packet.
              d  Hash on the IP destination address of the rx packet.
              f  Hash on bytes 0 and 1 of the Layer 4 header of the rx packet.
              n  Hash on bytes 2 and 3 of the Layer 4 header of the rx packet.
              r  Discard all packets of this flow type. When  this  option  is
                 set, all other options are ignored.

BUGS

       Not supported (in part or whole) on all ethernet drivers.

AUTHOR

       ethtool was written by David Miller.

       Modifications by Jeff Garzik, Tim Hockin, Jakub Jelinek, Andre Majorel,
       Eli Kupermann, Scott Feldman, Andi Kleen.

AVAILABILITY

       ethtool  is  available  over  the  Web  on  the  SourceForge  site   at
       http://sourceforge.net/projects/gkernel/