Linux/Unix命令之ethtool

description:ethtool - Display or change ethernet card settings（ethtool 是用来显示和更改网卡设置的工具1 ethtool 显示网络端口设置功能；这个功能比较好办。就是ethtool 后面直接接网絽接口就行；比如下面的例子； [root@localhost ~]# ethtool eth0Settings

hankwangwang

3356人浏览 · 2008-11-17 22:22:00

hankwangwang · 2008-11-17 22:22:00 发布

description:

ethtool - Display or change ethernet card settings（ethtool 是用来显示和更改网卡设置的工具

1 ethtool 显示网络端口设置功能；

这个功能比较好办。就是ethtool 后面直接接网絽接口就行；比如下面的例子；

[root@localhost ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes: 10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised auto-negotiation: No 注：自动协商关闭
        Speed: 100Mb/s 注：速度 100Mb
        Duplex: Full 注：全双工
        Port: MII
        PHYAD: 32
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes 注：eth0已经激活..

2 ethtool 设置网卡的协商模式

在ethtool -h查看帮助

ethtool -s DEVNAME /
                [ speed 10|100|1000 ] /
                [ duplex half|full ] /
                [ port tp|aui|bnc|mii|fibre ] /
                [ autoneg on|off ] /

＊实例一：把网卡eth0 速度改为10Mb/s，采用半双工；

[root@cuc03 beinan]# ethtool -s eth1 speed 10 duplex half
[root@cuc03 beinan]# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised auto-negotiation: No
        Speed: 10Mb/s 注：速度 10M/s
        Duplex: Half 注：半双工
        Port: MII
        PHYAD: 32
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: no 注：eth1没有激活；

＊实例二：把网卡eth0 速度改为100Mb/s，采用全双工；

[root@cuc03 beinan]# ethtool -s eth1 speed 100 duplex full
[root@cuc03 beinan]# ethtool eth1
Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes: 10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised auto-negotiation: No
        Speed: 100Mb/s 注：速度 100M/s
        Duplex: Full 注：全双工
        Port: MII
        PHYAD: 32
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: no 注：eth1网卡没有激活；

//////////////////////////////////////////////////////////////////////////////////////////////////////

描述：
Ethtool是用于查询及设置网卡参数的命令。

概要：
ethtool ethX      //查询ethX网口基本设置
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]/         //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
[phyad N]/
[xcvr internal|exteral]/
[wol p|u|m|b|a|g|s|d...]/
[sopass xx:yy:zz:aa:bb:cc]/
[msglvl N]

举例：
1）[root@linux /]# ethtool eth1
   Settings for eth1:
        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: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: umbg
        Wake-on: d
        Link detected: yes
2）[root@linux /]# ethtool -i eth1
   driver: e1000
   version: 5.0.43-k1
   firmware-version: N/A
   bus-info: 06:08.1
3）[root@linux /]# ethtool -S eth1
   NIC statistics:
     rx_packets: 58068300
     tx_packets: 87124083
     rx_bytes: 1589713008
     tx_bytes: 2165825901
     rx_errors: 0
     tx_errors: 0
     rx_dropped: 0
     tx_dropped: 0
     multicast: 0
     collisions: 0
     rx_length_errors: 0
     rx_over_errors: 0
     rx_crc_errors: 0
     rx_frame_errors: 0
     rx_fifo_errors: 0
     rx_missed_errors: 0
     tx_aborted_errors: 0
     tx_carrier_errors: 0
     tx_fifo_errors: 0
     tx_heartbeat_errors: 0
     tx_window_errors: 0
4）[root@linux /]# ethtool -s eth1 autoneg off speed 100 duplex full

相关：
1）[root@linux /]# which ethtool
    /sbin/ethtool
2）[root@linux /]# rpm -qf /sbin/ethtool
   ethtool-1.6-5
3）怎样使ethtool设置永久保存在网络设备中？
   解决方法一:
    ethtool设置可通过/etc/sysconfig/network-scripts/ifcfg-ethX文件保存,从而在设备下次启动时激活选项。
例如：ethtool -s eth0 speed 100 duplex full autoneg off
此指令将eth0设备设置为全双工自适应，速度为100Mbs。若要eth0启动时设置这些参数, 修改文件/etc/sysconfig/network-scripts/ifcfg-eth0 ，添加如下一行:
ETHTOOL_OPTS="speed 100 duplex full autoneg off"
解决方法二:
将ethtool设置写入/etc/rc.d/rc.local之中。