Provided by: ethtool_5.16-1ubuntu0.1_amd64 bug

NAME

       ethtool - query or control network driver and hardware settings

SYNOPSIS

       ethtool devname

       ethtool -h|--help

       ethtool --version

       ethtool [--debug N] args

       ethtool [--json] args

       ethtool [-I | --include-statistics] args

       ethtool --monitor [ command ] [ devname ]

       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] [cqe-mode-rx on|off] [cqe-mode-tx on|off]

       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 [--all-groups|--groups [eth-phy] [eth-mac] [eth-ctrl] ]

       ethtool --phy-statistics devname

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

       ethtool -s devname [speed N] [lanes N] [duplex half|full] [port tp|aui|bnc|mii]
              [mdix auto|on|off] [autoneg on|off] [advertise N[/M] | advertise mode on|off ...]
              [phyad N] [xcvr internal|external] [wol N[/M] | wol p|u|m|b|a|g|s|f|d...]
              [sopass xx:yy:zz:aa:bb:cc] [master-slave preferred-master|preferred-slave|forced-
              master|forced-slave] [msglvl N[/M] | msglvl type on|off ...]

       ethtool -n|-u|--show-nfc|--show-ntuple devname
              [ rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 |
              rule N ]

       ethtool -N|-U|--config-nfc|--config-ntuple devname
              rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 m|v|t|s|d|f|n|r... |
              flow-type ether|ip4|tcp4|udp4|sctp4|ah4|esp4|ip6|tcp6|udp6|ah6|esp6|sctp6
              [src xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]]
              [dst xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [proto N [m N]] [src-ip ip-
              address [m ip-address]] [dst-ip ip-address [m ip-address]] [tos N [m N]]
              [tclass 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]
              [context 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:...]  [start N] [ equal
              N | weight W0 W1 ... | default ] [hfunc FUNC] [context CTX | new] [delete]

       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] [page N] [bank N] [i2c 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]

       ethtool --set-phy-tunable devname [ downshift on|off [count N] ] [ fast-link-down on|off
              [msecs N] ] [ energy-detect-power-down on|off [msecs N] ]

       ethtool --get-phy-tunable devname [downshift] [fast-link-down] [energy-detect-power-down]

       ethtool --get-tunable devname [rx-copybreak] [tx-copybreak] [pfc-prevention-tout]

       ethtool --set-tunable devname [rx-copybreak N] [tx-copybreak N] [pfc-prevention-tout N]

       ethtool --reset devname [flags N] [mgmt] [mgmt-shared] [irq] [irq-shared] [dma] [dma-
              shared] [filter] [filter-shared] [offload] [offload-shared] [mac] [mac-shared]
              [phy] [phy-shared] [ram] [ram-shared] [ap] [ap-shared] [dedicated] [all]

       ethtool --show-fec devname

       ethtool --set-fec devname encoding auto|off|rs|baser|llrs [...]

       ethtool -Q|--per-queue devname [queue_mask %x] sub_command ...
               .

       ethtool --cable-test devname

       ethtool --cable-test-tdr devname [first N] [last N] [step N] [pair N]

       ethtool --show-tunnels devname

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 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.

       --version
              Shows the ethtool version number.

       --debug N
              Turns on debugging messages. Argument is interpreted as a mask:

              0x01  Parser information

       --json Output results in JavaScript Object Notation  (JSON).  Only  a  subset  of  options
              support this. Those which do not will continue to output plain text in the presence
              of this option.

       -I --include-statistics
              Include command-related statistics in the output.  This  option  allows  displaying
              relevant device statistics for selected get commands.

       -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 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 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 network device for associated driver information.

       -d --register-dump
              Retrieves  and  prints  a  register  dump  for  the  specified network 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 network 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.

           raw on|off

           offset N

           length N

       -E --change-eeprom
              If value is specified, changes  EEPROM  byte  for  the  specified  network  device.
              offset  and value specify which byte and it's new value. If value is not specified,
              stdin is read and written to the EEPROM. The length  and  offset  parameters  allow
              writing  to  certain  portions  of the EEPROM.  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-features --show-offload
              Queries  the  specified  network device for the state of protocol offload and other
              features.

       -K --features --offload
              Changes the offload parameters and other features of the specified 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 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

           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 involves 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 address.

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

       -S --statistics
              Queries the specified network device for standard (IEEE, IETF, etc.), or  NIC-  and
              driver-specific  statistics. NIC- and driver-specific statistics are requested when
              no group of statistics is specified.

              NIC- and  driver-specific  statistics  and  standard  statistics  are  independent,
              devices  may  implement  either,  both or none. There is little commonality between
              naming of NIC- and driver-specific statistics across vendors.

           --all-groups

           --groups [eth-phy] [eth-mac] [eth-ctrl] [rmon]
                  Request groups of standard device statistics.

       --phy-statistics
              Queries the specified network device for PHY specific statistics.

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

           offline
                  Perform full set of tests, possibly interrupting normal  operation  during  the
                  tests,

           online Perform limited set of tests, not interrupting normal operation,

           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.

           lanes N
                  Set number of lanes.

           duplex half|full
                  Sets full or half duplex mode.

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

           master-slave preferred-master|preferred-slave|forced-master|forced-slave
                  Configure MASTER/SLAVE role of the PHY. When the PHY is configured  as  MASTER,
                  the  PMA Transmit function shall source TX_TCLK from a local clock source. When
                  configured as SLAVE, the PMA Transmit function shall source  TX_TCLK  from  the
                  clock  recovered  from  data stream provided by MASTER. Not all devices support
                  this.

                  preferred-master   Prefer MASTER role on autonegotiation
                  preferred-slave    Prefer SLAVE role on autonegotiation
                  forced-master      Force the PHY in MASTER role. Can be used without autonegotiation
                  forced-slave       Force the PHY in SLAVE role. Can be used without autonegotiation

           mdix auto|on|off
                  Selects MDI-X mode for port. May be used to override  the  automatic  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. Autonegotiation 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 combination of the following values:

                  0x001                       10baseT Half
                  0x002                       10baseT Full
                  0x004                       100baseT Half
                  0x008                       100baseT Full
                  0x80000000000000000         100baseT1 Full
                  0x40000000000000000000000   100baseFX Half
                  0x80000000000000000000000   100baseFX Full
                  0x010                       1000baseT Half               (not supported by IEEE standards)
                  0x020                       1000baseT Full
                  0x20000                     1000baseKX Full
                  0x20000000000               1000baseX Full
                  0x100000000000000000        1000baseT1 Full
                  0x8000                      2500baseX Full               (not supported by IEEE standards)
                  0x800000000000              2500baseT Full
                  0x1000000000000             5000baseT Full
                  0x1000                      10000baseT Full
                  0x40000                     10000baseKX4 Full
                  0x80000                     10000baseKR Full
                  0x100000                    10000baseR_FEC
                  0x40000000000               10000baseCR Full
                  0x80000000000               10000baseSR Full
                  0x100000000000              10000baseLR Full
                  0x200000000000              10000baseLRM Full
                  0x400000000000              10000baseER Full
                  0x200000                    20000baseMLD2 Full           (not supported by IEEE standards)
                  0x400000                    20000baseKR2 Full            (not supported by IEEE standards)
                  0x80000000                  25000baseCR Full
                  0x100000000                 25000baseKR Full
                  0x200000000                 25000baseSR Full
                  0x800000                    40000baseKR4 Full
                  0x1000000                   40000baseCR4 Full
                  0x2000000                   40000baseSR4 Full
                  0x4000000                   40000baseLR4 Full
                  0x400000000                 50000baseCR2 Full
                  0x800000000                 50000baseKR2 Full
                  0x10000000000               50000baseSR2 Full
                  0x10000000000000            50000baseKR Full
                  0x20000000000000            50000baseSR Full
                  0x40000000000000            50000baseCR Full
                  0x80000000000000            50000baseLR_ER_FR Full
                  0x100000000000000           50000baseDR Full
                  0x8000000                   56000baseKR4 Full
                  0x10000000                  56000baseCR4 Full
                  0x20000000                  56000baseSR4 Full
                  0x40000000                  56000baseLR4 Full
                  0x1000000000                100000baseKR4 Full
                  0x2000000000                100000baseSR4 Full
                  0x4000000000                100000baseCR4 Full
                  0x8000000000                100000baseLR4_ER4 Full
                  0x200000000000000           100000baseKR2 Full
                  0x400000000000000           100000baseSR2 Full
                  0x800000000000000           100000baseCR2 Full
                  0x1000000000000000          100000baseLR2_ER2_FR2 Full
                  0x2000000000000000          100000baseDR2 Full
                  0x8000000000000000000       100000baseKR Full
                  0x10000000000000000000      100000baseSR Full
                  0x20000000000000000000      100000baseLR_ER_FR Full
                  0x40000000000000000000      100000baseCR Full
                  0x80000000000000000000      100000baseDR Full
                  0x4000000000000000          200000baseKR4 Full
                  0x8000000000000000          200000baseSR4 Full
                  0x10000000000000000         200000baseLR4_ER4_FR4 Full
                  0x20000000000000000         200000baseDR4 Full
                  0x40000000000000000         200000baseCR4 Full
                  0x100000000000000000000     200000baseKR2 Full
                  0x200000000000000000000     200000baseSR2 Full
                  0x400000000000000000000     200000baseLR2_ER2_FR2 Full
                  0x800000000000000000000     200000baseDR2 Full
                  0x1000000000000000000000    200000baseCR2 Full
                  0x200000000000000000        400000baseKR8 Full
                  0x400000000000000000        400000baseSR8 Full
                  0x800000000000000000        400000baseLR8_ER8_FR8 Full
                  0x1000000000000000000       400000baseDR8 Full
                  0x2000000000000000000       400000baseCR8 Full
                  0x2000000000000000000000    400000baseKR4 Full
                  0x4000000000000000000000    400000baseSR4 Full
                  0x8000000000000000000000    400000baseLR4_ER4_FR4 Full
                  0x10000000000000000000000   400000baseDR4 Full
                  0x20000000000000000000000   400000baseCR4 Full

           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|f|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™
                  s   Enable SecureOn™ password for MagicPacket™
                  f   Wake on filter(s)
                  d   Disable (wake on  nothing).   This  option
                      clears all previous options.

           sopass xx:yy:zz:aa:bb:cc
                  Sets  the  SecureOn™  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 numbers 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 drivers.

       -n -u --show-nfc --show-ntuple
              Retrieves receive network flow classification options or rules.

           rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
                  Retrieves the hash options for the specified flow type.

                  tcp4    TCP over IPv4
                  udp4    UDP over IPv4
                  ah4     IPSEC AH over IPv4
                  esp4    IPSEC ESP over IPv4
                  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|sctp6m|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|ip6|tcp6|udp6|ah6|esp6|sctp6
                  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
                  ip6     Raw IPv6
                  tcp6    TCP over IPv6
                  udp6    UDP over IPv6
                  sctp6   SCTP over IPv6
                  ah6     IPSEC AH over IPv6
                  esp6    IPSEC ESP over IPv6

           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 appended, 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]
                  Includes the Ethernet protocol number (ethertype) and an optional mask.   Valid
                  only for flow-type ether.

           src-ip ip-address [m ip-address]
                  Specify  the  source  IP  address of the incoming packet to match along with an
                  optional mask.  Valid for all IP based flow-types.

           dst-ip ip-address [m ip-address]
                  Specify the destination IP address of the incoming packet to match  along  with
                  an optional mask.  Valid for all IP based flow-types.

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

           tclass N [m N]
                  Specify the value of the Traffic Class field in the incoming  packet  to  match
                  along with an optional mask.  Applies to all IPv6 based flow-types.

           l4proto N [m N]
                  Includes  the  layer 4 protocol number and optional mask.  Valid only for flow-
                  types ip4 and ip6.

           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 and their IPv6 equivalents.

           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 and their IPv6 equivalents.

           spi N [m N]
                  Specify the value of the security parameter index field (applicable  to  AH/ESP
                  packets)in the incoming packet to match along with an optional mask.  Valid for
                  flow-types ip4, ah4, and esp4 and their IPv6 equivalents.

           l4data N [m N]
                  Specify the value of the first 4 Bytes of Layer 4 in  the  incoming  packet  to
                  match along with an optional mask.  Valid for ip4 and ip6 flow-types.

           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 IP based flow-
                  types.

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

                  -1            Drop the matched flow
                  -2            Use the matched flow as a Wake-on-LAN filter
                  0 or higher   Rx queue to route the flow

           context N
                  Specifies  the RSS context to spread packets over multiple queues; either 0 for
                  the default RSS context, or a value returned by ethtool -X ... context new.

           vf N   Specifies the Virtual Function the  filter  applies  to.  Not  compatible  with
                  action.

           queue N
                  Specifies the Rx queue to send packets to. Not compatible with action.

           loc N  Specify  the  location/ID  to  insert  the  rule.  This will overwrite any rule
                  present in that location and will not go  through  any  of  the  rule  ordering
                  process.

           delete N
                  Deletes the RX classification rule with the given ID.

       -w --get-dump
              Retrieves  and  prints firmware dump for the specified network device.  By default,
              it prints out the dump flag, version and length of the dump  data.   When  data  is
              indicated, then ethtool fetches the dump data and directs it to a file.

       -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.

           hfunc  Sets RSS hash function of the specified  network  device.   List  of  RSS  hash
                  functions  which  kernel supports is shown as a part of the --show-rxfh command
                  output.

           start N
                  For the equal and weight options, sets the starting receive queue for spreading
                  flows to N.

           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.

           context CTX | new
                  Specifies an RSS context to act on; either new to allocate a new  RSS  context,
                  or CTX, a value returned by a previous ... context new.

           delete Delete the specified RSS context.  May only be used in conjunction with context
                  and a non-zero CTX 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.

       -L --set-channels
              Changes the numbers of channels of the specified network device.

           rx N   Changes the number of channels with only receive queues.

           tx N   Changes the number of channels with only transmit queues.

           other N
                  Changes the  number  of  channels  used  only  for  other  purposes  e.g.  link
                  interrupts or SR-IOV co-ordination.

           combined N
                  Changes the number of multi-purpose channels.

       -m --dump-module-eeprom --module-info
              Retrieves  and  if possible decodes the EEPROM from plugin modules, e.g SFP+, QSFP.
              If the driver and module support it, the optical  diagnostic  information  is  also
              read  and  decoded.   When either one of page, bank or i2c parameters is specified,
              dumps only of a single page or its portion is allowed. In such a  case  offset  and
              length parameters are treated relatively to EEPROM page boundaries.

       --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 specifications)

       --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.

       --set-phy-tunable
              Sets the PHY tunable parameters.

           downshift on|off
                  Specifies whether downshift should be enabled.

                  count N
                      Sets the PHY downshift re-tries count.

           fast-link-down on|off
                  Specifies whether Fast Link Down should be enabled and time until link down (if
                  supported).

                  msecs N
                      Sets the period after which the link is reported as down. Note that the PHY may choose
                      the closest supported value. Only on reading back the tunable do you get the actual value.

           energy-detect-power-down on|off
                  Specifies whether Energy  Detect  Power  Down  (EDPD)  should  be  enabled  (if
                  supported).   This will put the RX and TX circuit blocks into a low power mode,
                  and the PHY will wake up periodically to send link pulses to avoid any  lock-up
                  situation  with  a  peer  PHY that may also have EDPD enabled. By default, this
                  setting will also enable the periodic transmission of TX pulses.

                  msecs N
                      Some PHYs support configuration of the wake-up interval to send TX pulses.
                      This setting allows the control of this interval, and 0 disables TX pulses
                      if the PHY supports this. Disabling TX pulses can create a lock-up situation
                      where neither of the PHYs wakes the other one. If unspecified the default
                      value (in milliseconds) will be used by the PHY.

       --get-phy-tunable
              Gets the PHY tunable parameters.

           downshift
                  For operation in cabling environments that are  incompatible  with  1000BASE-T,
                  PHY  device  provides  an automatic link speed downshift operation.  Link speed
                  downshift after N failed 1000BASE-T auto-negotiation  attempts.   Downshift  is
                  useful where cable does not have the 4 pairs instance.

                  Gets the PHY downshift count/status.

           fast-link-down
                  Depending  on the mode it may take 0.5s - 1s until a broken link is reported as
                  down.  In certain use cases a link-down event needs to be reported as  soon  as
                  possible.    Some  PHYs  support  a  Fast  Link  Down  Feature  and  may  allow
                  configuration of the delay before a broken link is reported as being down.

                  Gets the PHY Fast Link Down status / period.

           energy-detect-power-down
                  Gets  the  current  configured  setting  for  Energy  Detect  Power  Down   (if
                  supported).

       --get-tunable
              Get the tunable parameters.

           rx-copybreak
                  Get the current rx copybreak value in bytes.

           tx-copybreak
                  Get the current tx copybreak value in bytes.

           pfc-prevention-tout
                  Get the current pfc prevention timeout value in msecs.

       --set-tunable
              Set driver's tunable parameters.

           rx-copybreak N
                  Set the rx copybreak value in bytes.

           tx-copybreak N
                  Set the tx copybreak value in bytes.

           pfc-prevention-tout N
                  Set  pfc  prevention timeout in msecs. Value of 0 means disable and 65535 means
                  auto.

       --reset
              Reset hardware components specified by flags and components listed below

           flags N
                  Resets the components based on direct flags mask

           mgmt   Management processor

           irq    Interrupt requester

           dma    DMA engine

           filter Filtering/flow direction

           offload
                  Protocol offload

           mac    Media access controller

           phy    Transceiver/PHY

           ram    RAM shared between multiple components ap Application Processor

           dedicated
                  All components dedicated to this interface

           all    All components used by this interface, even if shared

       --show-fec
              Queries the specified network device for its support of Forward Error Correction.

       --set-fec
              Configures Forward Error Correction for the specified network device.

              Forward Error Correction modes selected by a user  are  expected  to  be  persisted
              after  any hotplug events. If a module is swapped that does not support the current
              FEC mode, the driver or firmware must  take  the  link  down  administratively  and
              report the problem in the system logs for users to correct.

           encoding auto|off|rs|baser|llrs [...]

                  Sets the FEC encoding for the device.  Combinations of options are specified as
                  e.g.  encoding auto rs ;  the  semantics  of  such  combinations  vary  between
                  drivers.

                  auto    Use the driver's default encoding
                  off     Turn off FEC
                  RS      Force RS-FEC encoding
                  BaseR   Force BaseR encoding
                  LLRS    Force LLRS-FEC encoding

       -Q|--per-queue
              Applies provided sub command to specific queues.

           queue_mask %x
                  Sets the specific queues which the sub command is applied to.  If queue_mask is
                  not set, the sub command will be applied to all queues.

           sub_command
                  Sub command to apply. The supported sub commands  include  --show-coalesce  and
                  --coalesce.

       q.B --cable-test
              Perform  a  cable test and report the results. What results are returned depends on
              the capabilities of the network interface. Typically open pairs and  shorted  pairs
              can  be  reported,  along  with  pairs  being  O.K.  When  a  fault is detected the
              approximate distance to the fault may be reported.

       --cable-test-tdr
              Perform a cable test and report the raw Time Domain Reflectometer data.  A pulse is
              sent  down  a cable pair and the amplitude of the reflection, for a given distance,
              is reported. A break in the cable returns a big reflection.  Minor  damage  to  the
              cable  returns  a  small  reflection. If the cable is shorted, the amplitude of the
              reflection can be negative. By default, data is returned for lengths between 0  and
              150m  at  1m steps, for all pairs. However parameters can be passed to restrict the
              collection of data. It should be noted, that the interface will round the distances
              to  whatever granularity is actually implemented. This is often 0.8 of a meter. The
              results should include the actual rounded first and last distance and step size.

           first  N
                  Distance along the cable, in meters, where  the  first  measurement  should  be
                  made.

           last  N
                  Distance along the cable, in meters, where the last measurement should be made.

           step  N
                  Distance, in meters, between each measurement.

           pair  N
                  Which  pair  should be measured. Typically a cable has 4 pairs. 0 = Pair A, 1 =
                  Pair B, ...

       --monitor
              Listens to netlink notification and displays them.

           command
                  If argument matching a command is used, ethtool  only  shows  notifications  of
                  this  type.  Without  such  argument  or with --all, all notification types are
                  shown.

           devname
                  If a device name is used as argument, only notification  for  this  device  are
                  shown. Default is to show notifications for all devices.

       --show-tunnels
              Show  tunnel-related  device  capabilities  and  state.   List UDP ports kernel has
              programmed the device to parse as VxLAN, or GENEVE tunnels.

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, Ben
       Hutchings, Scott Branden.

AVAILABILITY

       ethtool is available from ⟨http://www.kernel.org/pub/software/network/ethtool/