ETHTOOL(8) System Manager's Manual ETHTOOL(8)
ethtool - query or control network driver and hardware settings
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] [tx-aggr-max-bytes N] [tx-aggr-max-frames N] [tx-aggr-time-usecs N] ethtool -g|--show-ring devname ethtool -G|--set-ring devname [rx N] [rx-mini N] [rx-jumbo N] [tx N] [rx-buf-len N] [cqe-size N] [tx-push N] [rx-push N] [tx-push-buf-len 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] [rmon] ] 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] [tx- buf-size] [pfc-prevention-tout] ethtool --set-tunable devname [rx-copybreak N] [tx-copybreak N] [tx-buf-size 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 ethtool --show-module devname ethtool --set-module devname [power-mode-policy high|auto] ethtool --get-plca-cfg devname ethtool --set-plca-cfg devname [enable on|off] [node-id N] [node-cnt N] [to-tmr N] [burst-cnt N] [burst-tmr N] ethtool --get-plca-status devname ethtool --show-mm devname ethtool --set-mm devname [verify-enabled on|off] [verify-time N] [tx-enabled on|off] [pmac-enabled on|off] [tx-min-frag-size N] ethtool --show-pse devname ethtool --set-pse devname [podl-pse-admin-control enable|disable]
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.
Not supported (in part or whole) on all network drivers.
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.
ethtool is available from ⟨http://www.kernel.org/pub/software/network/ethtool/⟩
This page is part of the ethtool (utility for controlling network
drivers and hardware) project. Information about the project can
be found at
⟨https://www.kernel.org/pub/software/network/ethtool/⟩. If you
have a bug report for this manual page, send it to
firstname.lastname@example.org, email@example.com. This page was obtained
from the project's upstream Git repository
2023-12-22. (At that time, the date of the most recent commit
that was found in the repository was 2023-11-23.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to firstname.lastname@example.org
Ethtool version 6.6 November 2023 ETHTOOL(8)
Pages that refer to this page: veth(4), ip-link(8), ovs-l3ping(8), ovs-test(8), ovs-vlan-test(8), tc-mqprio(8)