linux下用mii-tool和ethtool 查看网线是否正确连接到网卡

输入mii-tool可以查看网线是否连接到网卡
#mii-tool

eth0: negotiated 100baseTx-FD, link ok

有时驱动可能不支持会出错下列错误
#mii-tool

SIOCGMIIPHY on ‘eth0’ failed: Operation not supported
no MII interfaces found

可以使用ethtool查看
#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: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: yes

Link detected: yes为正常no为失败