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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: Symmetric
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Speed: 100Mb/s
# 使用命令查看时，虽然显示是千兆网卡，但Speed只有100Mb/s
ethtool -s eno1 speed 1000
# 使用上面命令可能将网卡重新设置为1000Mb/s
vim /etc/sysconfig/network-scripts/ifcfg-eno1
ETHTOOL_OPTS="speed 1000 duplex full autoneg off"
# 在网卡配置中加入上面一行，可以强制将网卡设置为千兆。
==============================================================================================
ethtool命令的简单使用
ethtool ethX
# 查看网卡信息
ethtool –h
# 显示ethtool的命令帮助(help)
ethtool –i ethX
# 查询ethX网口的相关信息
ethtool –d ethX
# 查询ethX网口注册性信息
ethtool –r ethX
# 重置ethX网口到自适应模式
ethtool –S ethX
# 查询ethX网口收发包统计
ethtool –s ethX [speed 10|100|1000] [duplex half|full] [autoneg on|off] [port tp|aui|bnc|mii]
# [speed 10|100|1000] 设置网口速率10/100/1000M
# [duplex half|full] 设置网口半/全双工
# [autoneg on|off] 设置网口是否自协商
# [port tp|aui|bnc|mii] 设置网口类型
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