linux下查看网卡速率

机房交换机升级换成全千兆了，想在服务器上查看下速率，

当时使用mii-tool命令查看，

mii-tool -v eth0

eth0: negotiated 100baseTx-FD, link ok
  product info: vendor 00:d8:97, model 54 rev 0
  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
  link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

显示的居然是百兆的，不应该啊，在交换机上查看了下对应的端口显示的是千兆，用该命令换了几台服务器显示的都是百兆，怀疑是命令的问题，后从网上找到文章换成ethtool终于正常了，在此记录下

 

ethtool eth0

Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x000000ff (255)
        Link detected: yes