1ETHTOOL(8) System Manager's Manual ETHTOOL(8)
2
6 ethtool - query or control network driver and hardware settings
7
9 ethtool devname
10 ethtool -h|--help
12 ethtool --version
14 ethtool -a|--show-pause devname
16 ethtool -A|--pause devname [autoneg on|off] [rx on|off] [tx on|off]
18 ethtool -c|--show-coalesce devname
20 ethtool -C|--coalesce devname [adaptive-rx on|off] [adaptive-tx on|off]
22 [rx-usecs N] [rx-frames N] [rx-usecs-irq N] [rx-frames-irq N]
23 [tx-usecs N] [tx-frames N] [tx-usecs-irq N] [tx-frames-irq N]
24 [stats-block-usecs N] [pkt-rate-low N] [rx-usecs-low N]
25 [rx-frames-low N] [tx-usecs-low N] [tx-frames-low N]
26 [pkt-rate-high N] [rx-usecs-high N] [rx-frames-high N]
27 [tx-usecs-high N] [tx-frames-high N] [sample-interval N]
28 ethtool -g|--show-ring devname
30 ethtool -G|--set-ring devname [rx N] [rx-mini N] [rx-jumbo N] [tx N]
32 ethtool -i|--driver devname
34 ethtool -d|--register-dump devname [raw on|off] [hex on|off] [file
36 name]
37 ethtool -e|--eeprom-dump devname [raw on|off] [offset N] [length N]
39 ethtool -E|--change-eeprom devname [magic N] [offset N] [length N]
41 [value N]
42 ethtool -k|--show-features|--show-offload devname
44 ethtool -K|--features|--offload devname feature on|off ...
46 ethtool -p|--identify devname [N]
48 ethtool -P|--show-permaddr devname
50 ethtool -r|--negotiate devname
52 ethtool -S|--statistics devname
54 ethtool --phy-statistics devname
56 ethtool -t|--test devname [offline|online|external_lb]
58 ethtool -s devname [speed N] [duplex half|full] [port tp|aui|bnc|mii]
60 [mdix auto|on|off] [autoneg on|off] [advertise N] [phyad N]
61 [xcvr internal|external] [wol p|u|m|b|a|g|s|d...]
62 [sopass xx:yy:zz:aa:bb:cc] [msglvl N | msglvl type on|off ...]
63 ethtool -n|-u|--show-nfc|--show-ntuple devname
65 [ rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 |
66 rule N ]
67 ethtool -N|-U|--config-nfc|--config-ntuple devname
69 rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
70 m|v|t|s|d|f|n|r... |
71 flow-type
72 ether|ip4|tcp4|udp4|sctp4|ah4|esp4|ip6|tcp6|udp6|ah6|esp6|sctp6
73 [src xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]]
74 [dst xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [proto N [m N]]
75 [src-ip ip-address [m ip-address]] [dst-ip ip-address [m ip-
76 address]] [tos N [m N]] [tclass N [m N]] [l4proto N [m N]]
77 [src-port N [m N]] [dst-port N [m N]] [spi N [m N]]
78 [l4data N [m N]] [vlan-etype N [m N]] [vlan N [m N]]
79 [user-def N [m N]] [dst-
80 mac xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [action N]
81 [context N] [loc N] |
82 delete N
83 ethtool -w|--get-dump devname [data filename]
85 ethtool -W|--set-dump devname N
87 ethtool -T|--show-time-stamping devname
89 ethtool -x|--show-rxfh-indir|--show-rxfh devname
91 ethtool -X|--set-rxfh-indir|--rxfh devname [hkey xx:yy:zz:aa:bb:cc:...]
93 [ equal N | weight W0 W1 ... | default ] [hfunc FUNC] [context
94 CTX | new] [delete]
95 ethtool -f|--flash devname file [N]
97 ethtool -l|--show-channels devname
99 ethtool -L|--set-channels devname [rx N] [tx N] [other N] [combined N]
101 ethtool -m|--dump-module-eeprom|--module-info devname [raw on|off]
103 [hex on|off] [offset N] [length N]
104 ethtool --show-priv-flags devname
106 ethtool --set-priv-flags devname flag on|off ...
108 ethtool --show-eee devname
110 ethtool --set-eee devname [eee on|off] [tx-lpi on|off] [tx-timer N]
112 [advertise N]
113 ethtool --show-fec devname
115 ethtool --set-fec devname [encoding auto|off|rs|baser]
117
120 ethtool is used to query and control network device driver and hardware
121 settings, particularly for wired Ethernet devices.
122 devname is the name of the network device on which ethtool should oper‐
124 ate.
125
128 ethtool with a single argument specifying the device name prints cur‐
129 rent settings of the specified device.
130 -h --help
132 Shows a short help message.
133 --version
135 Shows the ethtool version number.
136 -a --show-pause
138 Queries the specified Ethernet device for pause parameter infor‐
139 mation.
140 -A --pause
142 Changes the pause parameters of the specified Ethernet device.
143 autoneg on|off
145 Specifies whether pause autonegotiation should be enabled.
146 rx on|off
148 Specifies whether RX pause should be enabled.
149 tx on|off
151 Specifies whether TX pause should be enabled.
152 -c --show-coalesce
154 Queries the specified network device for coalescing information.
155 -C --coalesce
157 Changes the coalescing settings of the specified network device.
158 -g --show-ring
160 Queries the specified network device for rx/tx ring parameter
161 information.
162 -G --set-ring
164 Changes the rx/tx ring parameters of the specified network de‐
165 vice.
166 rx N Changes the number of ring entries for the Rx ring.
168 rx-mini N
170 Changes the number of ring entries for the Rx Mini ring.
171 rx-jumbo N
173 Changes the number of ring entries for the Rx Jumbo ring.
174 tx N Changes the number of ring entries for the Tx ring.
176 -i --driver
178 Queries the specified network device for associated driver in‐
179 formation.
180 -d --register-dump
182 Retrieves and prints a register dump for the specified network
183 device. The register format for some devices is known and de‐
184 coded others are printed in hex. When raw is enabled, then eth‐
185 tool dumps the raw register data to stdout. If file is speci‐
186 fied, then use contents of previous raw register dump, rather
187 than reading from the device.
188 -e --eeprom-dump
190 Retrieves and prints an EEPROM dump for the specified network
191 device. When raw is enabled, then it dumps the raw EEPROM data
192 to stdout. The length and offset parameters allow dumping cer‐
193 tain portions of the EEPROM. Default is to dump the entire EEP‐
194 ROM.
195 raw on|off
197 offset N
199 length N
201 -E --change-eeprom
203 If value is specified, changes EEPROM byte for the specified
204 network device. offset and value specify which byte and it's
205 new value. If value is not specified, stdin is read and written
206 to the EEPROM. The length and offset parameters allow writing to
207 certain portions of the EEPROM. Because of the persistent na‐
208 ture of writing to the EEPROM, a device-specific magic key must
209 be specified to prevent the accidental writing to the EEPROM.
210 -k --show-features --show-offload
212 Queries the specified network device for the state of protocol
213 offload and other features.
214 -K --features --offload
216 Changes the offload parameters and other features of the speci‐
217 fied network device. The following feature names are built-in
218 and others may be defined by the kernel.
219 rx on|off
221 Specifies whether RX checksumming should be enabled.
222 tx on|off
224 Specifies whether TX checksumming should be enabled.
225 sg on|off
227 Specifies whether scatter-gather should be enabled.
228 tso on|off
230 Specifies whether TCP segmentation offload should be en‐
231 abled.
232 ufo on|off
234 Specifies whether UDP fragmentation offload should be en‐
235 abled
236 gso on|off
238 Specifies whether generic segmentation offload should be en‐
239 abled
240 gro on|off
242 Specifies whether generic receive offload should be enabled
243 lro on|off
245 Specifies whether large receive offload should be enabled
246 rxvlan on|off
248 Specifies whether RX VLAN acceleration should be enabled
249 txvlan on|off
251 Specifies whether TX VLAN acceleration should be enabled
252 ntuple on|off
254 Specifies whether Rx ntuple filters and actions should be
255 enabled
256 rxhash on|off
258 Specifies whether receive hashing offload should be enabled
259 -p --identify
261 Initiates adapter-specific action intended to enable an operator
262 to easily identify the adapter by sight. Typically this in‐
263 volves blinking one or more LEDs on the specific network port.
264 [ N] Length of time to perform phys-id, in seconds.
266 -P --show-permaddr
268 Queries the specified network device for permanent hardware ad‐
269 dress.
270 -r --negotiate
272 Restarts auto-negotiation on the specified Ethernet device, if
273 auto-negotiation is enabled.
274 -S --statistics
276 Queries the specified network device for NIC- and driver-specif‐
277 ic statistics.
278 --phy-statistics
280 Queries the specified network device for PHY specific statis‐
281 tics.
282 -t --test
284 Executes adapter selftest on the specified network device. Pos‐
285 sible test modes are:
286 offline
288 Perform full set of tests, possibly interrupting normal op‐
289 eration during the tests,
290 online Perform limited set of tests, not interrupting normal opera‐
292 tion,
293 external_lb
295 Perform full set of tests, as for offline, and additionally
296 an external-loopback test.
297 -s --change
299 Allows changing some or all settings of the specified network
300 device. All following options only apply if -s was specified.
301 speed N
303 Set speed in Mb/s. ethtool with just the device name as an
304 argument will show you the supported device speeds.
305 duplex half|full
307 Sets full or half duplex mode.
308 port tp|aui|bnc|mii
310 Selects device port.
311 mdix auto|on|off
313 Selects MDI-X mode for port. May be used to override the au‐
314 tomatic detection feature of most adapters. An argument of
315 auto means automatic detection of MDI status, on forces MDI-
316 X (crossover) mode, while off means MDI (straight through)
317 mode. The driver should guarantee that this command takes
318 effect immediately, and if necessary may reset the link to
319 cause the change to take effect.
320 autoneg on|off
322 Specifies whether autonegotiation should be enabled. Autone‐
323 gotiation is enabled by default, but in some network devices
324 may have trouble with it, so you can disable it if really
325 necessary.
326 advertise N
328 Sets the speed and duplex advertised by autonegotiation.
329 The argument is a hexadecimal value using one or a combina‐
330 tion of the following values:
331 0x001 10baseT Half
333 0x002 10baseT Full
334 0x004 100baseT Half
335 0x008 100baseT Full
336 0x010 1000baseT Half (not supported by IEEE standards)
337 0x020 1000baseT Full
338 0x20000 1000baseKX Full
339 0x20000000000 1000baseX Full
340 0x800000000000 2500baseT Full
341 0x8000 2500baseX Full (not supported by IEEE standards)
342 0x1000000000000 5000baseT Full
343 0x1000 10000baseT Full
344 0x40000 10000baseKX4 Full
345 0x80000 10000baseKR Full
346 0x40000000000 10000baseCR Full
347 0x80000000000 10000baseSR Full
348 0x100000000000 10000baseLR Full
349 0x200000000000 10000baseLRM Full
350 0x400000000000 10000baseER Full
351 0x200000 20000baseMLD2 Full (not supported by IEEE standards)
352 0x400000 20000baseKR2 Full (not supported by IEEE standards)
353 0x80000000 25000baseCR Full
354 0x100000000 25000baseKR Full
355 0x200000000 25000baseSR Full
356 0x800000 40000baseKR4 Full
357 0x1000000 40000baseCR4 Full
358 0x2000000 40000baseSR4 Full
359 0x4000000 40000baseLR4 Full
360 0x400000000 50000baseCR2 Full
361 0x800000000 50000baseKR2 Full
362 0x10000000000 50000baseSR2 Full
363 0x8000000 56000baseKR4 Full
364 0x10000000 56000baseCR4 Full
365 0x20000000 56000baseSR4 Full
366 0x40000000 56000baseLR4 Full
367 0x1000000000 100000baseKR4 Full
368 0x2000000000 100000baseSR4 Full
369 0x4000000000 100000baseCR4 Full
370 0x8000000000 100000baseLR4_ER4 Full
371 phyad N
373 PHY address.
374 xcvr internal|external
376 Selects transceiver type. Currently only internal and exter‐
377 nal can be specified, in the future further types might be
378 added.
379 wol p|u|m|b|a|g|s|d...
381 Sets Wake-on-LAN options. Not all devices support this.
382 The argument to this option is a string of characters speci‐
383 fying which options to enable.
384 p Wake on PHY activity
386 u Wake on unicast messages
387 m Wake on multicast messages
388 b Wake on broadcast messages
389 a Wake on ARP
390 g Wake on MagicPacket™
391 s Enable SecureOn™ password for MagicPacket™
392 d Disable (wake on nothing). This option
393 clears all previous options.
394 sopass xx:yy:zz:aa:bb:cc
396 Sets the SecureOn™ password. The argument to this option
397 must be 6 bytes in Ethernet MAC hex format
398 (xx:yy:zz:aa:bb:cc).
399 msglvl N
401 msglvl type on|off ...
402 Sets the driver message type flags by name or number. type
403 names the type of message to enable or disable; N specifies
404 the new flags numerically. The defined type names and num‐
405 bers are:
406 drv 0x0001 General driver status
408 probe 0x0002 Hardware probing
409 link 0x0004 Link state
410 timer 0x0008 Periodic status check
411 ifdown 0x0010 Interface being brought down
412 ifup 0x0020 Interface being brought up
413 rx_err 0x0040 Receive error
414 tx_err 0x0080 Transmit error
415 tx_queued 0x0100 Transmit queueing
416 intr 0x0200 Interrupt handling
417 tx_done 0x0400 Transmit completion
418 rx_status 0x0800 Receive completion
419 pktdata 0x1000 Packet contents
420 hw 0x2000 Hardware status
421 wol 0x4000 Wake-on-LAN status
422 The precise meanings of these type flags differ between
424 drivers.
425 -n -u --show-nfc --show-ntuple
427 Retrieves receive network flow classification options or rules.
428 rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
430 Retrieves the hash options for the specified flow type.
431 tcp4 TCP over IPv4
433 udp4 UDP over IPv4
434 ah4 IPSEC AH over IPv4
435 esp4 IPSEC ESP over IPv4
436 sctp4 SCTP over IPv4
437 tcp6 TCP over IPv6
438 udp6 UDP over IPv6
439 ah6 IPSEC AH over IPv6
440 esp6 IPSEC ESP over IPv6
441 sctp6 SCTP over IPv6
442 rule N Retrieves the RX classification rule with the given ID.
444 -N -U --config-nfc --config-ntuple
446 Configures receive network flow classification options or rules.
447 rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
449 m|v|t|s|d|f|n|r...
450 Configures the hash options for the specified flow type.
451 m Hash on the Layer 2 destination address of the rx packet.
453 v Hash on the VLAN tag of the rx packet.
454 t Hash on the Layer 3 protocol field of the rx packet.
455 s Hash on the IP source address of the rx packet.
456 d Hash on the IP destination address of the rx packet.
457 f Hash on bytes 0 and 1 of the Layer 4 header of the rx packet.
458 n Hash on bytes 2 and 3 of the Layer 4 header of the rx packet.
459 r Discard all packets of this flow type. When this option is
460 set, all other options are ignored.
461 flow-type
463 ether|ip4|tcp4|udp4|sctp4|ah4|esp4|ip6|tcp6|udp6|ah6|esp6|sctp6
464 Inserts or updates a classification rule for the specified
465 flow type.
466 ether Ethernet
468 ip4 Raw IPv4
469 tcp4 TCP over IPv4
470 udp4 UDP over IPv4
471 sctp4 SCTP over IPv4
472 ah4 IPSEC AH over IPv4
473 esp4 IPSEC ESP over IPv4
474 ip6 Raw IPv6
475 tcp6 TCP over IPv6
476 udp6 UDP over IPv6
477 sctp6 SCTP over IPv6
478 ah6 IPSEC AH over IPv6
479 esp6 IPSEC ESP over IPv6
480 For all fields that allow both a value and a mask to be specified,
482 the mask may be specified immediately after the value using the m
483 keyword, or separately using the field name keyword with -mask ap‐
484 pended, e.g. src-mask.
485 src xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
487 Includes the source MAC address, specified as 6 bytes in
488 hexadecimal separated by colons, along with an optional
489 mask. Valid only for flow-type ether.
490 dst xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
492 Includes the destination MAC address, specified as 6 bytes
493 in hexadecimal separated by colons, along with an optional
494 mask. Valid only for flow-type ether.
495 proto N [m N]
497 Includes the Ethernet protocol number (ethertype) and an op‐
498 tional mask. Valid only for flow-type ether.
499 src-ip ip-address [m ip-address]
501 Specify the source IP address of the incoming packet to
502 match along with an optional mask. Valid for all IP based
503 flow-types.
504 dst-ip ip-address [m ip-address]
506 Specify the destination IP address of the incoming packet to
507 match along with an optional mask. Valid for all IP based
508 flow-types.
509 tos N [m N]
511 Specify the value of the Type of Service field in the incom‐
512 ing packet to match along with an optional mask. Applies to
513 all IPv4 based flow-types.
514 tclass N [m N]
516 Specify the value of the Traffic Class field in the incoming
517 packet to match along with an optional mask. Applies to all
518 IPv6 based flow-types.
519 l4proto N [m N]
521 Includes the layer 4 protocol number and optional mask.
522 Valid only for flow-types ip4 and ip6.
523 src-port N [m N]
525 Specify the value of the source port field (applicable to
526 TCP/UDP packets) in the incoming packet to match along with
527 an optional mask. Valid for flow-types ip4, tcp4, udp4, and
528 sctp4 and their IPv6 equivalents.
529 dst-port N [m N]
531 Specify the value of the destination port field (applicable
532 to TCP/UDP packets)in the incoming packet to match along
533 with an optional mask. Valid for flow-types ip4, tcp4,
534 udp4, and sctp4 and their IPv6 equivalents.
535 spi N [m N]
537 Specify the value of the security parameter index field (ap‐
538 plicable to AH/ESP packets)in the incoming packet to match
539 along with an optional mask. Valid for flow-types ip4, ah4,
540 and esp4 and their IPv6 equivalents.
541 l4data N [m N]
543 Specify the value of the first 4 Bytes of Layer 4 in the in‐
544 coming packet to match along with an optional mask. Valid
545 for ip4 and ip6 flow-types.
546 vlan-etype N [m N]
548 Includes the VLAN tag Ethertype and an optional mask.
549 vlan N [m N]
551 Includes the VLAN tag and an optional mask.
552 user-def N [m N]
554 Includes 64-bits of user-specific data and an optional mask.
555 dst-mac xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]
557 Includes the destination MAC address, specified as 6 bytes
558 in hexadecimal separated by colons, along with an optional
559 mask. Valid for all IP based flow-types.
560 action N
562 Specifies the Rx queue to send packets to, or some other ac‐
563 tion.
564 -1 Drop the matched flow
566 0 or higher Rx queue to route the flow
567 context N
569 Specifies the RSS context to spread packets over multiple
570 queues; either 0 for the default RSS context, or a value re‐
571 turned by ethtool -X ... context new.
572 loc N Specify the location/ID to insert the rule. This will over‐
574 write any rule present in that location and will not go
575 through any of the rule ordering process.
576 delete N
578 Deletes the RX classification rule with the given ID.
579 -w --get-dump
581 Retrieves and prints firmware dump for the specified network de‐
582 vice. By default, it prints out the dump flag, version and
583 length of the dump data. When data is indicated, then ethtool
584 fetches the dump data and directs it to a file.
585 -W --set-dump
587 Sets the dump flag for the device.
588 -T --show-time-stamping
590 Show the device's time stamping capabilities and associated PTP
591 hardware clock.
592 -x --show-rxfh-indir --show-rxfh
594 Retrieves the receive flow hash indirection table and/or RSS
595 hash key.
596 -X --set-rxfh-indir --rxfh
598 Configures the receive flow hash indirection table and/or RSS
599 hash key.
600 hkey Sets RSS hash key of the specified network device. RSS hash
602 key should be of device supported length. Hash key format
603 must be in xx:yy:zz:aa:bb:cc format meaning both the nibbles
604 of a byte should be mentioned even if a nibble is zero.
605 hfunc Sets RSS hash function of the specified network device.
607 List of RSS hash functions which kernel supports is shown as
608 a part of the --show-rxfh command output.
609 equal N
611 Sets the receive flow hash indirection table to spread flows
612 evenly between the first N receive queues.
613 weight W0 W1 ...
615 Sets the receive flow hash indirection table to spread flows
616 between receive queues according to the given weights. The
617 sum of the weights must be non-zero and must not exceed the
618 size of the indirection table.
619 default
621 Sets the receive flow hash indirection table to its default
622 value.
623 context CTX | new
625 Specifies an RSS context to act on; either new to allocate a
626 new RSS context, or CTX, a value returned by a previous
627 ... context new.
628 delete Delete the specified RSS context. May only be used in con‐
630 junction with context and a non-zero CTX value.
631 -f --flash
633 Write a firmware image to flash or other non-volatile memory on
634 the device.
635 file Specifies the filename of the firmware image. The firmware
637 must first be installed in one of the directories where the
638 kernel firmware loader or firmware agent will look, such as
639 /lib/firmware.
640 N If the device stores multiple firmware images in separate
642 regions of non-volatile memory, this parameter may be used
643 to specify which region is to be written. The default is 0,
644 requesting that all regions are written. All other values
645 are driver-dependent.
646 -l --show-channels
648 Queries the specified network device for the numbers of channels
649 it has. A channel is an IRQ and the set of queues that can
650 trigger that IRQ.
651 -L --set-channels
653 Changes the numbers of channels of the specified network device.
654 rx N Changes the number of channels with only receive queues.
656 tx N Changes the number of channels with only transmit queues.
658 other N
660 Changes the number of channels used only for other purposes
661 e.g. link interrupts or SR-IOV co-ordination.
662 combined N
664 Changes the number of multi-purpose channels.
665 -m --dump-module-eeprom --module-info
667 Retrieves and if possible decodes the EEPROM from plugin mod‐
668 ules, e.g SFP+, QSFP. If the driver and module support it, the
669 optical diagnostic information is also read and decoded.
670 --show-priv-flags
672 Queries the specified network device for its private flags. The
673 names and meanings of private flags (if any) are defined by each
674 network device driver.
675 --set-priv-flags
677 Sets the device's private flags as specified.
678 flag on|off Sets the state of the named private flag.
680 --show-eee
682 Queries the specified network device for its support of Energy-
683 Efficient Ethernet (according to the IEEE 802.3az specifica‐
684 tions)
685 --set-eee
687 Sets the device EEE behaviour.
688 eee on|off
690 Enables/disables the device support of EEE.
691 tx-lpi on|off
693 Determines whether the device should assert its Tx LPI.
694 advertise N
696 Sets the speeds for which the device should advertise EEE
697 capabilities. Values are as for --change advertise
698 tx-timer N
700 Sets the amount of time the device should stay in idle mode
701 prior to asserting its Tx LPI (in microseconds). This has
702 meaning only when Tx LPI is enabled.
703 --show-fec
705 Queries the specified network device for its support of Forward
706 Error Correction.
707 --set-fec
709 Configures Forward Error Correction for the specified network
710 device.
711 Forward Error Correction modes selected by a user are expected
713 to be persisted after any hotplug events. If a module is swapped
714 that does not support the current FEC mode, the driver or
715 firmware must take the link down administratively and report the
716 problem in the system logs for users to correct.
717 encoding auto|off|rs|baser
719 Sets the FEC encoding for the device.
720 auto Use the driver's default encoding
722 off Turn off FEC
723 RS Force RS-FEC encoding
724 BaseR Force BaseR encoding
725
727 Not supported (in part or whole) on all network drivers.
728
730 ethtool was written by David Miller.
731 Modifications by Jeff Garzik, Tim Hockin, Jakub Jelinek, Andre Majorel,
733 Eli Kupermann, Scott Feldman, Andi Kleen, Alexander Duyck, Sucheta
734 Chakraborty, Jesse Brandeburg, Ben Hutchings.
735
737 ethtool is available from
738 ⟨http://www.kernel.org/pub/software/network/ethtool/⟩
739Ethtool version 4.8 October 2016 ETHTOOL(8)