ethtool

       ethtool devname

       ethtool -h|--help

       ethtool --version

       ethtool -a|--show-pause devname

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

       ethtool -c|--show-coalesce devname

       ethtool -C|--coalesce devname [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

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

       ethtool -i|--driver devname

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

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

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

       ethtool -k|--show-features|--show-offload devname

       ethtool -K|--features|--offload devname feature on|off ...

       ethtool -p|--identify devname [N]

       ethtool -P|--show-permaddr devname

       ethtool -r|--negotiate devname

       ethtool -S|--statistics devname

       ethtool --phy-statistics devname

       ethtool -t|--test devname [offline|online|external_lb]

       ethtool -s devname [speed N] [duplex half|full] [port tp|aui|bnc|mii]
              [mdix auto|on|off] [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 | msglvl type on|off ...]
              [tos N [m N]] [l4proto N [m N]] [src-port N [m N]]
              [dst-port N [m N]] [spi N [m N]] [l4data N [m N]]
              [vlan-etype N [m N]] [vlan N [m N]] [user-def N [m N]] [dst-
              mac xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [action N] [loc N]
              |
              delete N

       ethtool -w|--get-dump devname [data filename]

       ethtool -W|--set-dump devname N

       ethtool -T|--show-time-stamping devname

       ethtool -x|--show-rxfh-indir|--show-rxfh devname

       ethtool -X|--set-rxfh-indir|--rxfh devname [hkey xx:yy:zz:aa:bb:cc:...]
              [ equal N | weight W0 W1 ... | default ]

       ethtool -f|--flash devname file [N]

       ethtool -l|--show-channels devname

       ethtool -L|--set-channels devname [rx N] [tx N] [other N] [combined N]

       ethtool -m|--dump-module-eeprom|--module-info devname [raw on|off]
              [hex on|off] [offset N] [length N]

       ethtool --show-priv-flags devname

       ethtool --set-priv-flags devname flag on|off ...

       ethtool --show-eee devname

       ethtool --set-eee devname [eee on|off] [tx-lpi on|off] [tx-timer N]
              [advertise N]

DESCRIPTION
       ethtool is used to query and control network device driver and hardware
       settings, particularly for wired Ethernet devices.

       devname is the name of the network device on which ethtool should oper-
       ate.

OPTIONS
       ethtool  with  a single argument specifying the device name prints cur-
       rent settings of the specified device.

       -h --help
              Shows a short help message.

       --version
              Shows the ethtool version number.

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

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

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

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

       -G --set-ring
              Changes the rx/tx ring parameters of the specified  network  de-
              vice.

           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 network device for associated driver in-
              formation.

       -d --register-dump
              Retrieves and prints a register dump for the  specified  network
              device.   The  register format for some devices is known and de-
              coded others are printed in hex.  When raw is enabled, then eth-
              tool  dumps  the raw register data to stdout.  If file is speci-
              fied, 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 network
              device.  When raw is enabled, then it dumps the raw EEPROM  data
              to  stdout.  The length and offset parameters allow dumping cer-
              tain portions of the EEPROM.  Default is to dump the entire EEP-
              ROM.

           raw on|off

           offset N

           length N

       -E --change-eeprom
              If  value  is  specified,  changes EEPROM byte for the specified
              Changes the offload parameters and other features of the  speci-
              fied  network  device.  The following feature names are built-in
              and others may be defined by the kernel.

           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  en-
                  abled.

           ufo on|off
                  Specifies  whether  UDP  fragmentation offload should be en-
                  abled

           gso on|off
                  Specifies whether generic segmentation offload should be en-
                  abled

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

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

           rxvlan on|off
                  Specifies whether RX VLAN acceleration should be enabled

           txvlan on|off
                  Specifies whether TX VLAN acceleration should be enabled

           ntuple on|off
                  Specifies  whether  Rx  ntuple filters and actions should be
                  enabled

           rxhash on|off
                  Specifies whether receive hashing offload should be enabled

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

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

       -P --show-permaddr
              Queries the specified network device for permanent hardware  ad-
              dress.

       -t --test
              Executes adapter selftest on the specified network device.  Pos-
              sible test modes are:

           offline
                  Perform  full set of tests, possibly interrupting normal op-
                  eration during the tests,

           online Perform limited set of tests, not interrupting normal opera-
                  tion,

           external_lb
                  Perform  full set of tests, as for offline, and additionally
                  an external-loopback test.

       -s --change
              Allows changing some or all settings of  the  specified  network
              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.

           mdix auto|on|off
                  Selects MDI-X mode for port. May be used to override the au-
                  tomatic  detection  feature of most adapters. An argument of
                  auto means automatic detection of MDI status, on forces MDI-
                  X  (crossover)  mode, while off means MDI (straight through)
                  mode.  The driver should guarantee that this  command  takes
                  effect  immediately,  and if necessary may reset the link to
                  cause the change to take effect.

           autoneg on|off
                  Specifies whether autonegotiation should be enabled. Autone-
                  gotiation is enabled by default, 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 hexadecimal value using one or a  combina-
                  tion of the following values:

                  0x001       10baseT Half
                  0x002       10baseT Full
                  0x004       100baseT Half
                  0x008       100baseT Full
                  0x4000000   40000baseLR4 Full

           phyad N
                  PHY address.

           xcvr internal|external
                  Selects transceiver type. Currently only internal and exter-
                  nal 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 speci-
                  fying 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 MagicPackettm
                  s   Enable SecureOntm password for MagicPackettm
                  d   Disable  (wake  on  nothing).   This  option
                      clears all previous options.

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

           msglvl N
           msglvl type on|off ...
                  Sets the driver message type flags by name or  number.  type
                  names  the type of message to enable or disable; N specifies
                  the new flags numerically. The defined type names  and  num-
                  bers are:

                  drv         0x0001  General driver status
                  probe       0x0002  Hardware probing
                  link        0x0004  Link state
                  timer       0x0008  Periodic status check
                  ifdown      0x0010  Interface being brought down
                  ifup        0x0020  Interface being brought up
                  rx_err      0x0040  Receive error
                  tx_err      0x0080  Transmit error
                  tx_queued   0x0100  Transmit queueing
                  intr        0x0200  Interrupt handling
                  tx_done     0x0400  Transmit completion
                  rx_status   0x0800  Receive completion
                  pktdata     0x1000  Packet contents
                  hw          0x2000  Hardware status
                  wol         0x4000  Wake-on-LAN status

                  The  precise  meanings  of  these  type flags differ between
                  sctp4   SCTP over IPv4
                  tcp6    TCP over IPv6
                  udp6    UDP over IPv6
                  ah6     IPSEC AH over IPv6
                  esp6    IPSEC ESP over IPv6
                  sctp6   SCTP over IPv6

           rule N Retrieves the RX classification rule with the given ID.

       -N -U --config-nfc --config-ntuple
              Configures receive network flow classification options or rules.

           rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
           m|v|t|s|d|f|n|r...
                  Configures the hash options for the specified flow type.

                  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.

           flow-type ether|ip4|tcp4|udp4|sctp4|ah4|esp4
                  Inserts or updates a classification rule for  the  specified
                  flow type.

                  ether   Ethernet
                  ip4     Raw IPv4
                  tcp4    TCP over IPv4
                  udp4    UDP over IPv4
                  sctp4   SCTP over IPv4
                  ah4     IPSEC AH over IPv4
                  esp4    IPSEC ESP over IPv4

           For  all fields that allow both a value and a mask to be specified,
           the mask may be specified immediately after the value using  the  m
           keyword,  or separately using the field name keyword with -mask ap-
           pended, e.g. src-mask.

           src xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
                  Includes the source MAC address, specified  as  6  bytes  in
                  hexadecimal  separated  by  colons,  along  with an optional
                  mask.  Valid only for flow-type ether.

           dst xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
                  Includes the destination MAC address, specified as  6  bytes
                  in  hexadecimal  separated by colons, along with an optional
                  mask.  Valid only for flow-type ether.

           proto N [m N]

           tos N [m N]
                  Specify the value of the Type of Service field in the incom-
                  ing packet to match along with an optional mask.  Applies to
                  all IPv4 based flow-types.

           l4proto N [m N]
                  Includes  the  layer  4  protocol  number and optional mask.
                  Valid only for flow-type ip4.

           src-port N [m N]
                  Specify the value of the source port  field  (applicable  to
                  TCP/UDP  packets) in the incoming packet to match along with
                  an optional mask.  Valid for flow-types ip4, tcp4, udp4, and
                  sctp4.

           dst-port N [m N]
                  Specify  the value of the destination port field (applicable
                  to TCP/UDP packets)in the incoming  packet  to  match  along
                  with  an  optional  mask.   Valid  for flow-types ip4, tcp4,
                  udp4, and sctp4.

           spi N [m N]
                  Specify the value of the security parameter index field (ap-
                  plicable  to  AH/ESP packets)in the incoming packet to match
                  along with an optional mask.  Valid for flow-types ip4, ah4,
                  and esp4.

           l4data N [m N]
                  Specify the value of the first 4 Bytes of Layer 4 in the in-
                  coming packet to match along with an optional  mask.   Valid
                  for ip4 flow-type.

           vlan-etype N [m N]
                  Includes the VLAN tag Ethertype and an optional mask.

           vlan N [m N]
                  Includes the VLAN tag and an optional mask.

           user-def N [m N]
                  Includes 64-bits of user-specific data and an optional mask.

           dst-mac xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
                  Includes  the  destination MAC address, specified as 6 bytes
                  in hexadecimal separated by colons, along with  an  optional
                  mask.  Valid for all IPv4 based flow-types.

           action N
                  Specifies the Rx queue to send packets to, or some other ac-
                  tion.

                  -1            Drop the matched flow
                  0 or higher   Rx queue to route the flow


       -W --set-dump
              Sets the dump flag for the device.

       -T --show-time-stamping
              Show  the device's time stamping capabilities and associated PTP
              hardware clock.

       -x --show-rxfh-indir --show-rxfh
              Retrieves the receive flow hash  indirection  table  and/or  RSS
              hash key.

       -X --set-rxfh-indir --rxfh
              Configures  the  receive  flow hash indirection table and/or RSS
              hash key.

           hkey   Sets RSS hash key of the specified network device. RSS  hash
                  key  should  be of device supported length.  Hash key format
                  must be in xx:yy:zz:aa:bb:cc format meaning both the nibbles
                  of a byte should be mentioned even if a nibble is zero.

           equal N
                  Sets the receive flow hash indirection table to spread flows
                  evenly between the first N receive queues.

           weight W0 W1 ...
                  Sets the receive flow hash indirection table to spread flows
                  between  receive queues according to the given weights.  The
                  sum of the weights must be non-zero and must not exceed  the
                  size of the indirection table.

           default
                  Sets  the receive flow hash indirection table to its default
                  value.

       -f --flash
              Write a firmware image to flash or other non-volatile memory  on
              the device.

           file   Specifies  the filename of the firmware image.  The firmware
                  must first be installed in one of the directories where  the
                  kernel  firmware loader or firmware agent will look, such as
                  /lib/firmware.

           N      If the device stores multiple firmware  images  in  separate
                  regions  of  non-volatile memory, this parameter may be used
                  to specify which region is to be written.  The default is 0,
                  requesting  that  all regions are written.  All other values
                  are driver-dependent.

       -l --show-channels
              Queries the specified network device for the numbers of channels
              it  has.   A  channel  is  an IRQ and the set of queues that can
              trigger that IRQ.

           combined N
                  Changes the number of multi-purpose channels.

       -m --dump-module-eeprom --module-info
              Retrieves  and  if  possible decodes the EEPROM from plugin mod-
              ules, e.g SFP+, QSFP.  If the driver and module support it,  the
              optical diagnostic information is also read and decoded.

       --show-priv-flags
              Queries the specified network device for its private flags.  The
              names and meanings of private flags (if any) are defined by each
              network device driver.

       --set-priv-flags
              Sets the device's private flags as specified.

           flag on|off Sets the state of the named private flag.

       --show-eee
              Queries  the specified network device for its support of Energy-
              Efficient Ethernet (according to  the  IEEE  802.3az  specifica-
              tions)

       --set-eee
              Sets the device EEE behaviour.

           eee on|off
                  Enables/disables the device support of EEE.

           tx-lpi on|off
                  Determines whether the device should assert its Tx LPI.

           advertise N
                  Sets  the  speeds  for which the device should advertise EEE
                  capabilities.  Values are as for --change advertise

           tx-timer N
                  Sets the amount of time the device should stay in idle  mode
                  prior  to  asserting  its Tx LPI (in microseconds). This has
                  meaning only when Tx LPI is enabled.

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

AUTHOR
       ethtool was written by David Miller.

       Modifications by Jeff Garzik, Tim Hockin, Jakub Jelinek, Andre Majorel,
       Eli  Kupermann,  Scott  Feldman,  Andi  Kleen, Alexander Duyck, Sucheta
       Chakraborty, Jesse Brandeburg.

AVAILABILITY
       ethtool                is                available                 from
       <http://www.kernel.org/pub/software/network/ethtool/>
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