Manpages

ethtool

ethtool

ethtool

ethtool --set-eee

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

ethtool --set-phy-tunable

devname [ downshift on|off [count N] ] [

ethtool --get-phy-tunable

devname [downshift] [fast-link-down]

ethtool --get-tunable

devname [rx-copybreak] [tx-copybreak]

ethtool --set-tunable

devname [rx-copybreak N] [tx-copybreak N]

ethtool --reset

devname [flags N] [mgmt] [mgmt-shared] [irq]

ethtool --show-fec

devname

ethtool --set-fec

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

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

ethtool --cable-test devname

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

ethtool --show-tunnels devname

ethtool --show-module devname

ethtool --set-module

devname [power-mode-policy high|auto]

[to-tmr N] [burst-cnt N] [burst-tmr N]

devname

[tx-enabled on|off] [pmac-enabled on|off] [tx-min-frag-size 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 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:

-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.

--src aggregate|emac|pmac

If the MAC Merge layer is supported, request a particular source of device statistics (eMAC or pMAC, or their aggregate). Only valid if ethtool was invoked with the -I --include-statistics argument.

-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-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.

rx-buf-len N

Changes the size of a buffer in the Rx ring.

tcp-data-split auto|on|off

Specifies the state of TCP data split.

cqe-size N

Changes the size of completion queue event.

tx-push on|off

Specifies whether TX push should be enabled.

rx-push on|off

Specifies whether RX push should be enabled.

tx-push-buf-len N

Specifies the maximum number of bytes of a transmitted packet a driver can push directly to the underlying device

-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.

-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.

--src aggregate|emac|pmac

If the MAC Merge layer is supported, request a particular source of device statistics (eMAC or pMAC, or their aggregate).

--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,

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.

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:

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.

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:

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.

-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.

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.

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.

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.

queue N

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

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.

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.

-f --flash

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

-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.

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.

fast-link-down on|off

Specifies whether Fast Link Down should be enabled and time until link down (if supported).

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.

--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.

tx-buf-size

Get the current tx copybreak buffer size 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.

tx-buf-size N

Set the tx copybreak buffer size 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

offload

Protocol offload

dedicated

All components dedicated to this interface

--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.

-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.

--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.

--show-module

Show the transceiver module’s parameters.

--set-module

Set the transceiver module’s parameters.

power-mode-policy high|auto

Set the power mode policy for the module. When set to high, the module always operates at high power mode. When set to auto, the module is transitioned by the host to high power mode when the first port using it is put administratively up and to low power mode when the last port using it is put administratively down. The power mode policy can be set before a module is plugged-in.

--get-plca-cfg

Show the current PLCA parameters for the given interface.

--set-plca-cfg

Change the PLCA settings for the given interface.

enable on|off

Enables or disables the PLCA function. When the PLCA RS is disabled (default), the PHY operates in plain CSMA/CD mode. To enable PLCA, the PHY must be assigned a unique plca-id other than 255. This one can be configured concurrently with the enable parameter. The enable parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.1 (aPLCAAdminState) and clause 30.16.1.2.1 (acPLCAAdminControl).

node-id N

The unique node identifier in the range [0 .. 255]. Node ID 0 is reserved for the coordinator node, the one generating the BEACON signal. There must be exactly one coordinator on a PLCA network. Setting the node ID to 255 (default) disables the node. This parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.4 (aPLCALocalNodeID).

node-cnt N

The node-cnt [1 .. 255] should be set after the maximum number of nodes that can be plugged to the multi-drop network. This parameter regulates the minimum length of the PLCA cycle. Therefore, it is only meaningful for the coordinator node (nod-id = 0). Setting this parameter on a follower node has no effect. The node-cnt parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.3 (aPLCANodeCount).

to-tmr N

The TO timer parameter sets the value of the transmit opportunity timer in bit-times, and shall be set equal across all the nodes sharing the same medium for PLCA to work. The default value of 32 is enough to cover a link of roughly 50 mt. This parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.5 (aPLCATransmitOpportunityTimer).

burst-cnt N

The burst-cnt parameter [0 .. 255] indicates the extra number of packets that the node is allowed to send during a single transmit opportunity. By default, this attribute is 0, meaning that the node can send a sigle frame per TO. When greater than 0, the PLCA RS keeps the TO after any transmission, waiting for the MAC to send a new frame for up to burst-tmr BTs. This can only happen a number of times per PLCA cycle up to the value of this parameter. After that, the burst is over and the normal counting of TOs resumes. This parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.6 (aPLCAMaxBurstCount).

burst-tmr N

The burst-tmr parameter [0 .. 255] sets how many bit-times the PLCA RS waits for the MAC to initiate a new transmission when burst-cnt is greater than 0. If the MAC fails to send a new frame within this time, the burst ends and the counting of TOs resumes. Otherwise, the new frame is sent as part of the current burst. This parameter maps to IEEE 802.3cg-2019 clause 30.16.1.1.7 (aPLCABurstTimer). The value of burst-tmr should be set greater than the Inter-Frame-Gap (IFG) time of the MAC (plus some margin) for PLCA burst mode to work as intended.

--get-plca-status

Show the current PLCA status for the given interface. If on, the PHY is successfully receiving or generating the BEACON signal. If off, the PLCA function is temporarily disabled and the PHY is operating in plain CSMA/CD mode.

--show-mm

Show the MAC Merge layer state. The ethtool argument -I --include-statistics can be used with this command, and MAC Merge layer statistics counters will also be retrieved.

pmac-enabled

Shows whether the pMAC is enabled and capable of receiving traffic and SMD-V frames (and responding to them with SMD-R replies).

tx-enabled

Shows whether transmission on the pMAC is administratively enabled.

tx-active

Shows whether transmission on the pMAC is active (verification is either successful, or was disabled).

tx-min-frag-size

Shows the minimum size (in octets) of transmitted non-final fragments which can be received by the link partner. Corresponds to the standard addFragSize variable using the formula:

tx-min-frag-size = 64 * (1 + addFragSize) - 4

rx-min-frag-size

Shows the minimum size (in octets) of non-final fragments which the local device supports receiving.

verify-enabled

Shows whether the verification state machine is enabled. This process, if successful, ensures that preemptible frames transmitted by the local device will not be dropped as error frames by the link partner.

verify-time

Shows the interval in ms between verification attempts, represented as an integer between 1 and 128 ms. The standard defines a fixed number of verification attempts (verifyLimit) before failing the verification process.

max-verify-time

Shows the maximum value for verify-time accepted by the local device, which may be less than 128 ms.

verify-status

Shows the current state of the verification state machine of the local device. Values can be INITIAL, VERIFYING, SUCCEEDED, FAILED or DISABLED.

--set-mm

Set the MAC Merge layer parameters.

pmac-enabled  on|off

Enable reception for the pMAC.

tx-enabled  on|off

Administatively enable transmission for the pMAC.

tx-min-frag-size  N

Set the minimum size (in octets) of transmitted non-final fragments which can be received by the link partner.

verify-enabled  on|off

Enable or disable the verification state machine.

verify-time  N

Set the interval in ms between verification attempts.

--show-pse

Show the current Power Sourcing Equipment (PSE) status for the given interface.

podl-pse-admin-state

This attribute indicates the operational status of PoDL PSE functions, which can be modified using the podl-pse-admin-control parameter. It corresponds to IEEE 802.3-2018 30.15.1.1.2 (aPoDLPSEAdminState), with potential values being enabled, disabled

podl-pse-power-detection-status

This attribute indicates the power detection status of the PoDL PSE. The status depend on internal PSE state machine and automatic PD classification support. It corresponds to IEEE 802.3-2018 30.15.1.1.3 (aPoDLPSEPowerDetectionStatus) with potential values being disabled, searching, delivering power, sleep, idle, error

--set-pse

Set Power Sourcing Equipment (PSE) parameters.

podl-pse-admin-control  enable|disable

This parameter manages PoDL PSE Admin operations in accordance with the IEEE 802.3-2018 30.15.1.2.1 (acPoDLPSEAdminControl) specification.

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/">http://www.kernel.org/pub/software/network/ethtool/