ethtool -s speed 1000 duplex full autoneg off ；强制千兆双工
ethtool eth0 ；查看eth0状态
ethtool -s eth0 advertise 0x020 ；设置为全双工1000M
可以设置的advertise参数：
advertise的值：
0x001 10 Half
0x002 10 Full
0x004 100 Half
0x008 100 Full
0x010 1000 Half(not supported by IEEE standards)
0x020 1000 Full
0x8000 2500 Full(not supported by IEEE standards)
0x800 10000 Full
0x03F Auto
# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: g
Wake-on: d
[ speed 10|100|1000|2500|10000 ]
[ duplex half|full ]
[ port tp|aui|bnc|mii|fibre ]
[ autoneg on|off ]
[ advertise %%x ]
[ phyad %%d ]
[ xcvr internal|external ]
[ wol p|u|m|b|a|g|s|d… ]
[ sopass %%x:%%x:%%x:%%x:%%x:%%x ]
[ msglvl %%d ]
# ethtool –help
ethtool version 6
Usage:
ethtool DEVNAME Display standard information about device
ethtool -s|–change DEVNAME Change generic options
[ speed 10|100|1000|2500|10000 ]
[ duplex half|full ]
[ port tp|aui|bnc|mii|fibre ]
[ autoneg on|off ]
[ advertise %%x ]
[ phyad %%d ]
[ xcvr internal|external ]
[ wol p|u|m|b|a|g|s|d… ]
[ sopass %%x:%%x:%%x:%%x:%%x:%%x ]
[ msglvl %%d ]
ethtool -a|–show-pause DEVNAME Show pause options
ethtool -A|–pause DEVNAME Set pause options
[ autoneg on|off ]
[ rx on|off ]
[ tx on|off ]
ethtool -c|–show-coalesce DEVNAME Show coalesce options
ethtool -C|–coalesce DEVNAME Set coalesce options
[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]
ethtool -g|–show-ring DEVNAME Query RX/TX ring parameters
ethtool -G|–set-ring DEVNAME Set RX/TX ring parameters
[ rx N ]
[ rx-mini N ]
[ rx-jumbo N ]
[ tx N ]
ethtool -k|–show-offload DEVNAME Get protocol offload information
ethtool -K|–offload DEVNAME Set protocol offload
[ rx on|off ]
[ tx on|off ]
[ sg on|off ]
[ tso on|off ]
[ ufo on|off ]
[ gso on|off ]
[ gro on|off ]
ethtool -i|–driver DEVNAME Show driver information
ethtool -d|–register-dump DEVNAME Do a register dump
[ raw on|off ]
[ file FILENAME ]
ethtool -e|–eeprom-dump DEVNAME Do a EEPROM dump
[ raw on|off ]
[ offset N ]
[ length N ]
ethtool -E|–change-eeprom DEVNAME Change bytes in device EEPROM
[ magic N ]
[ offset N ]
[ value N ]
ethtool -r|–negotiate DEVNAME Restart N-WAY negotation
ethtool -p|–identify DEVNAME Show visible port identification (e.g. blinking)
[ TIME-IN-SECONDS ]
ethtool -t|–test DEVNAME Execute adapter self test
[ online | offline ]
ethtool -S|–statistics DEVNAME Show adapter statistics
ethtool -h|–help