linux 网卡模式设置 mii-tool 和ethtool

[align=left]mii-tool 更改网络接口协商的方法；[/align]
# 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

[align=left]＊实例一：查看网络接口的协商状态；[/align]
[align=left][root@localhost ~]# mii-tool -v eth0[/align]
[align=left]eth0: negotiated 100baseTx-FD, link ok[/align]
[align=left] product info: vendor 00:00:00, model 0 rev 0[/align]
[align=left] basic mode: autonegotiation enabled[/align]
[align=left] basic status: autonegotiation complete, link ok[/align]
[align=left] capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD[/align]
[align=left] advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD[/align]
[align=left] link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control[/align]
[align=left]注：上面的例子，我们可以看得到是自动协商。注意红字的部份；[/align]
[align=left]＊实例二：更改网络接口协商方式；[/align]
[align=left]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；[/align]
[align=left]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？[/align]
[align=left][root@localhost ~]# mii-tool -F 100baseTx-FD[/align]
[align=left] [/align]
[align=left][root@localhost ~]#mii-tool -v eth0[/align]
[align=left]eth0: 100 Mbit, full duplex, link ok[/align]
[align=left] product info: vendor 00:00:00, model 0 rev 0[/align]
[align=left] basic mode: 100 Mbit, full duplex[/align]
[align=left] basic status: link ok[/align]
[align=left] capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD[/align]
[align=left] advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD[/align]
[align=left]注：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；[/align]
[align=left] [/align]
[align=left][root@localhost ~]# ethtool -s eth0 speed 100 duplex full[/align]
02、ethtool 工具关于网络协商功能介绍；
[align=left]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。[/align]


2.1 ethtool 显示网络端口设置功能；
[align=left]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；[/align]
[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；

2.2 ethtool 设置网卡的协商模式；

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 ]

[align=left]＊实例一： 把网卡eth0 速度改为10Mb/s，采用半双工；[/align]
[align=left][root@cuc03 beinan]# ethtool -s eth1 speed 10 duplex half[/align]
[align=left][root@cuc03 beinan]# ethtool eth1[/align]
[align=left]Settings for eth1:[/align]
[align=left] Supported ports: [ TP MII ][/align]
[align=left] Supported link modes: 10baseT/Half 10baseT/Full[/align]
[align=left] 100baseT/Half 100baseT/Full[/align]
[align=left] Supports auto-negotiation: Yes[/align]
[align=left] Advertised link modes: 10baseT/Half 10baseT/Full[/align]
[align=left] 100baseT/Half 100baseT/Full[/align]
[align=left] Advertised auto-negotiation: No[/align]
[align=left] Speed: 10Mb/s 注：速度 10M/s[/align]
[align=left] Duplex: Half 注：半双工[/align]
[align=left] Port: MII[/align]
[align=left] PHYAD: 32[/align]
[align=left] Transceiver: internal[/align]
[align=left] Auto-negotiation: off[/align]
[align=left] Supports Wake-on: pumbg[/align]
[align=left] Wake-on: d[/align]
[align=left] Current message level: 0x00000007 (7)[/align]
[align=left] Link detected: no 注：eth1没有激活；[/align]
[align=left]＊实例二： 把网卡eth0 速度改为100Mb/s，采用全双工；[/align]
[align=left][root@cuc03 beinan]# ethtool -s eth1 speed 100 duplex full[/align]
[align=left][root@cuc03 beinan]# ethtool eth1[/align]
[align=left]Settings for eth1:[/align]
[align=left] Supported ports: [ TP MII ][/align]
[align=left] Supported link modes: 10baseT/Half 10baseT/Full[/align]
[align=left] 100baseT/Half 100baseT/Full[/align]
[align=left] Supports auto-negotiation: Yes[/align]
[align=left] Advertised link modes: 10baseT/Half 10baseT/Full[/align]
[align=left] 100baseT/Half 100baseT/Full[/align]
[align=left] Advertised auto-negotiation: No[/align]
[align=left] Speed: 100Mb/s 注：速度 100M/s[/align]
[align=left] Duplex: Full 注：全双工[/align]
[align=left] Port: MII[/align]
[align=left] PHYAD: 32[/align]
[align=left] Transceiver: internal[/align]
[align=left] Auto-negotiation: off[/align]
[align=left] Supports Wake-on: pumbg[/align]
[align=left] Wake-on: d[/align]
[align=left] Current message level: 0x00000007 (7)[/align]
[align=left] Link detected: no 注：eth1网卡没有激活；[/align]