改变网络接口的速度和协商方式的工具 miitool 和 ethtool

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#   声明
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# 作者：北南南北
# 来自：LinuxSir.Org

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#   mii-tool 配置网络设备协商方式的工具
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#   用法
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#  mii-tool  --help
usage: mii-tool [-VvRrwl] [-A media,... | -F media] [interface ...]
       -V, --version               display version information
       -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

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#  例 1
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# 查看网络接口的协商状态

# 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

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#  例 2
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# 更改网络接口协商方式

# 把网络接口eth0改为 1000Mb/s全双工的模式应该怎么办呢？

# mii-tool -v eth0
eth0: 100 Mbit, full duplex, link ok
  product info: vendor 00:00:00, model 0 rev 0
  basic mode:   100 Mbit, full duplex
  basic status: link ok
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

# ethtool 工具来更改
# ethtool -s eth0 speed 100 duplex full

 

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#   ethtool 工具关于网络协商功能介绍
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#   用法
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# 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；

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#  ethtool 设置网卡的协商模式
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# ethtool -s DEVNAME \
                [ speed 10|100|1000 ] \
                [ duplex half|full ]    \
                [ port tp|aui|bnc|mii|fibre ] \
                [ autoneg on|off ] \

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#  例 1
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# 网卡eth0 速度改为10Mb/s，采用半双工

# ethtool -s eth1 speed 10 duplex half
# 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；

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#  例 2
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# 网卡eth0 速度改为100Mb/s，采用全双工

# ethtool -s eth1 speed 100 duplex full
# 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