Ethtool
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↑ http://man7.org/linux/man-pages/man8/ethtool.8.html
ethtool[1] command is used to view and modify network device drivers setting, in particular wired Ethernet devices.
ethtool -S eno1
ethtool -K eth0 gso off gro off tso off
ethtool -K eth0 gso on gro on tso on Actual changes: generic-segmentation-offload: on generic-receive-offload: on
ethtool -K eno1 tx on rx on Actual changes: rx-checksumming: on tx-checksumming: on tx-checksum-ip-generic: on tcp-segmentation-offload: on tx-tcp-segmentation: on
tx-tcp-mangleid-segmentation: on tx-tcp6-segmentation: on
- Disable TCP checksum offloading
ethtool -K eth0 tx off rx off
ethtool --show-offload eno0
Examples
ethtool eno1
Settings for eno1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 4
Transceiver: internal
Auto-negotiation: on
MDI-X: off
Supports Wake-on: g
Wake-on: g
Current message level: 0x000000ff (255)
drv probe link timer ifdown ifup rx_err tx_err
Link detected: yes
ethtool eno1 Settings for eno1: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: off (auto) Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000007 (7) drv probe link Link detected: yes
ethtool ens3f1 Settings for ens3f1: Supported ports: [ ] Supported link modes: 1000baseT/Full 1000baseKX/Full 10000baseT/Full 1000baseX/Full 10000baseSR/Full 10000baseLR/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 1000baseT/Full 1000baseKX/Full 10000baseT/Full 1000baseX/Full 10000baseSR/Full 10000baseLR/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: Unknown! Duplex: Unknown! (255) Port: Other PHYAD: 0 Transceiver: internal Auto-negotiation: off Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: no
ethtool -i eno1 driver: e1000e version: 3.2.6-k firmware-version: 0.5-4 expansion-rom-version: bus-info: 0000:00:1f.6 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no
Related terms
See also
- TCP/IP, Transport protocol, UDP, SCTP, QUIC, subnet mask, Routing protocols: BGP, routing table, Policy based routing, multicast, TCP Fast Open, RDP, TTL, RTT, MPTCP, Large send offload (LSO): (TSO, GRO, GSO, TCP checksum),
ethtool, SCTP, 5-Tuple, Check TCP connectivity, TCP window size,/proc/sys/net/ipv4/tcp_rmem, ack, List of TCP ports, localhost, broadcast address ifconfig,ethtoolor obsoletemii-tool(mii-tool -v eth0)nmcli device show,eth0, Network manager- MII:
mii-tool,ethtool, MDI, RGMII, SGMII, GMII, SFI, XFI, XAUI, SerDes - Ethernet: MII, MDI, bonding, etherchannel, STP, ARP, MAC, STP, Jumbo frames, 802.1X, MTU, Ethernet In-Band Access (IBA), LACP, Multicast, Broadcast, SPI
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