摘要: 在Linux中怎么看网卡是全双工工作还是半双工工作? 查看网卡全双工,还是半双工 Linux:~ # mii-tool eth0: no link eth1: no autonegotiation, 100baseTx-HD, link ok 设置网卡为...
在Linux中怎么看网卡是全双工工作还是半双工工作?
查看网卡全双工,还是半双工
Linux:~ # mii-tool eth0: no link eth1: no autonegotiation, 100baseTx-HD, link ok
设置网卡为半双工状态
Linux:~ # mii-tool -F mii-tool: option requires an argument -- F usage: mii-tool [-VvRrwl] [-A media,... | -F media] [interface ...] -V, --version display version information -v, --verbose more verbose output -R, --reset reset MII to poweron state -r, --restart restart autonegotiation -w, --watch monitor for link status changes -l, --log with -w, write events to syslog -A, --advertise=media,... advertise only specified media -F, --force=media force specified media technology media: 100baseT4, 100baseTx-FD, 100baseTx-HD,10baseT-FD, 10baseT-HD, (to advertise both HD and FD) 100baseTx, 10baseTLinux:~ # mii-tool eth0: no link eth1: no autonegotiation, 100baseTx-HD, link ok
Linux:~ # mii-tool -F 100baseTx-HD
//切换网卡得状态为半双工状态 Linux:~ # mii-tool eth0:100 Mbit, half duplex, no link eth1:100 Mbit, half duplex, link ok
出处:jekay100.cublog.cn 更新时间: 2007年03月30日 DNS客户端配置文件/etc/resolv.conf /etc/resolv.conf 里面存放的是各大通信公司DNS服务器列表;下面的三个地址可以用一用;当然您可以打电话问你的服务商; nameserver 202.96.134.133 nameserver 202.96.128.143 nameserver 202.96.68.38;改变网络接口的速度和协商方式的工具miitool 和ethtool 通过mii-tool和ethtool工具来调整网卡的速度、双工等,这样能提高网卡的效率;
mii-tool 配置网络设备协商方式的工具
mii-tool 介绍
mii-tool - view, manipulate media-independent interface status (mii-tool 是查看,管理介质的网络接口的状态) 有时网卡需要配置协商方式,比如10/100/1000M的网卡半双工、全双工、自动协商的配置 。但大多数的网络设备是不用我们来修改协商,因为大多数网络设置接入的时候,都采用自动协商来解决相互通信的问题。但在有的情况下,需要我们手动来设置网卡的协商方式; mii-tool 就是能指定网卡的协商方式。
注明:我在使用mii- tool工具修改协商模式时,提示是错误的,因为是在虚拟机中做的,不过虚拟机中的网卡我查看是支持全双工模式的,可是提 示错误SIOCGMIIPHY on 'eth0' failed: Operation not supported,问题出在那里也不清楚,用google查了下,发现不少人都是这样的错误,也没说明原因;不过多数人提示可以使用ethtool工具去修改,我测试了下,还行!
还有一种方法是修改/etc/modules.conf配置文件;
#ethtool -s eth0 autoneg off #ethtool -s eth0 duplex full
在/etc/modules.conf添加内容 alias eth0 bcm5700 line_speed=100 full_duplex=1 options bcm5700 line_speed=100 full_duplex=1 重起!
mii-tool 更改网络接口协商的方法;
[root@localhost]# 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
查看网络接口的协商状态
[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注:上面的例子,我们可以看得到是自动协商;
更改网络接口协商方式
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;
把网络接口eth0改为 1000Mb/s全双工的模式
[root@localhost]# mii-tool -F 100baseTx-FD [root@localhost]#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
也可以使用ethtool工具修改:
[root@localhost]# ethtool -s eth0 speed 100 duplex full
ethtool 工具关于网络协商功能介绍
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。
ethtool 显示网络端口设置功能
[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;
ethtool 设置网卡的协商模式;
ethtool -s DEVNAME [ speed 10|100|1000 ] [ duplex half|full ] [ port tp|aui|bnc|mii|fibre ] [ autoneg on|off ]
把网卡eth0 速度改为10Mb/s,采用半双工;
[root@localhost]# ethtool -s eth1 speed 10 duplex half [root@localhost]# 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;
把网卡eth0 速度改为100Mb/s,采用全双工;
[root@localhost]# ethtool -s eth1 speed 100 duplex full [root@localhost]# 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;