linux查看網卡速度和模式調整__linux

[root@c02b03 ~]#  ethtool eth0Settings for eth0:        Supported ports: [ FIBRE ]        Supported link modes:   1000baseT/Full         Supports auto-negotiation: Yes        Advertised link modes:  1000baseT/Full         Advertised pause frame use: Symmetric        Advertised auto-negotiation: Yes        Speed: Unknown!        Duplex: Unknown! (255)        Port: FIBRE        PHYAD: 0        Transceiver: internal        Auto-negotiation: on        Supports Wake-on: pumbg        Wake-on: g        Current message level: 0x00000003 (3)        Link detected: no[root@c02b03 ~]#  ethtool eth1Settings for eth1:        Supported ports: [ FIBRE ]        Supported link modes:   1000baseT/Full         Supports auto-negotiation: Yes        Advertised link modes:  1000baseT/Full         Advertised pause frame use: Symmetric        Advertised auto-negotiation: Yes        Speed: 1000Mb/s        Duplex: Full        Port: FIBRE        PHYAD: 0        Transceiver: internal        Auto-negotiation: on        Supports Wake-on: d        Wake-on: d        Current message level: 0x00000003 (3)        Link detected: yes

或者老的mii-tool命令(但是該命令似乎只能識別100M及以下網卡)亦可。

其中, Duplex: Full表示全雙工系統(FD)，half表示半雙工(HD)， Auto-negotiation 後邊表示是否自動協商

可以通過修改/etc/sysconfig/network-scripts/ifcfg-eth0檔案中的

ETHTOOL_OPTS="speed 100 duplex full autoneg off"

參數進行設定，使用ifup和ifdown來測試