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.

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.

raw on|off

offset N

length N

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

[ N]

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

--all-groups

--groups [eth-phy] [eth-mac] [eth-ctrl] [rmon]

Request groups of standard device statistics.

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.

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 ...

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.

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.

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.

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.

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.

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

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.

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.

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).

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.

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.

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

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

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.

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, ...

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.