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linux 网卡模式设置 mii-tool 和ethtool

<b>mii-tool </b><b>更改网络接口协商的方法;</b>

# mii-tool --help

usage: mii-tool [-VvRrwl] [-A media,... | -F media] [interface ...]

       -v, --verbose more verbose output 注:显示网络接口的信息;

       -R, --reset reset MII to poweron state 注:重设MII到开启状态;

       -r, --restart restart autonegotiation 注:重启自动协商模式;

       -w, --watch monitor for link status changes 注:查看网络接口连接的状态变化;

       -l, --log with -w, write events to syslog 注:写入事件到系统日志;

      -A, --advertise=media,... advertise only specified media 注:指令特定的网络接口;

      -F, --force=media force specified media technology 注:更改网络接口协商方式;

media: 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD,

       (to advertise both HD and FD) 100baseTx, 10baseT

<b>*</b><b>实例一:查看网络接口的协商状态;</b>

[root@localhost ~]# mii-tool -v eth0

eth0: negotiated 100baseTx-FD, link ok

 product info: vendor 00:00:00, model 0 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

 link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

<b>注</b><b>:</b>上面的例子,我们可以看得到是自动协商。注意红字的部份;

<b>*</b><b>实例二:更改网络接口协商方式;</b>

更改网络接口的协商方式,我们要用到-F选项,后面可以接 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD等参数;

如果我们想把网络接口eth0改为 1000Mb/s全双工的模式应该怎么办呢?

[root@localhost ~]# mii-tool -F 100baseTx-FD

[root@localhost ~]#mii-tool -v eth0

eth0: 100 Mbit, full duplex, link ok

 basic mode:   100 Mbit, full duplex

 basic status: link ok

<b>注:</b>是不是已经改过来了?当然,我们也一样用ethtool 工具来更改,比如执行下面的命令;

[root@localhost ~]# ethtool -s eth0 speed 100 duplex full

<b></b>

<b>0</b><b>2</b><b>、</b><b>ethtool </b><b>工具关于网络协商功能介绍;</b><b></b>

ethtool - Display or change ethernet card settings(ethtool 是用来显示和更改网卡设置的工具);这个工具比较复杂,功能也特别多。由于洋文比较难懂。所以我们还是把网络设备协商方式的设置方法说一说。

2.1 ethtool <b>显示网络端口设置功能;</b><b></b>

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

        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;

2.2 ethtool <b>设置网卡的协商模式;</b><b></b>

在ethtool的-h帮助中我们查看到有这样的帮助信息;

ethtool -s DEVNAME 

                [ speed 10|100|1000 ] 

                [ duplex half|full ] 

                [ port tp|aui|bnc|mii|fibre ] 

                [ autoneg on|off ] 

<b>*</b><b>实例一:</b> 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 link modes:   10baseT/Half 10baseT/Full

        Advertised link modes: 10baseT/Half 10baseT/Full

        Advertised auto-negotiation: No

        Speed: 10Mb/s 注:速度 10M/s

        Duplex: Half 注:半双工

        Link detected: no 注:eth1没有激活;

<b>*</b><b>实例二:</b> 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

        Speed: 100Mb/s 注:速度 100M/s

        Duplex: Full 注:全双工

        Link detected: no 注:eth1网卡没有激活;

本文转自zcm8483 51CTO博客,原文链接:http://blog.51cto.com/haolun/993117

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