linux网卡操作命令 ,查看Linux下网卡连接状态（up还是down)? |
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1. 调整网卡工作模式 mii-tool -v //查看网卡工作模式 mii-tool -F 100baseTx-FD eth0 //将eth0改为100M,全双工工作模式 mii-tool -r eth0 //恢复网卡工作模式 ethtool eth0 //查询网卡基本设置 ethtool -s eth0 autoneg off speed 100 duplex full //eth0设置为：100M，全双工，非协商 2. 网卡配置 ifconfig -h //打印帮助信息 ifconfig -a //打印当前网卡信息 ifconfig eth0 192.168.0.1 netmask 255.255.255.0 //设置eth0 IP及掩码 ifconfig eth0:0 192.168.0.2 netmask 255.255.255.0 //设置eth0的第二个IP ifconfig eth0:1 down //禁用eth0:0 ifconfig eth0 up //启用eth0 ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx //修改网卡MAC地址 ifconfig eth0 promisc //设置网卡工作于混杂模式下 iwconfig eth0 essid "tao" //设置无线网卡的essid为“tao” iwconfig eth0 mode Managed //设置无线网卡工作在Managed模式下 iwconfig eth0 mode Ad-hoc //设置无线网卡工作在Ad-hoc模式下 iwconfig eth0 freq 2.422G //设置无线网卡工作频率3.查看Linux下网卡连接状态（up还是down)?
1) 通过mii-tool指令 [root@localhost root]# mii-tool eth0: negotiated 100baseTx-FD, link ok eth1: no link 或 [root@localhost root]# mii-tool -v eth0: negotiated 100baseTx-FD, link ok product info: vendor 00:50:43, model 2 rev 3 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 flow-control link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD eth1: no link product info: vendor 00:50:43, model 2 rev 3 basic mode: autonegotiation enabled basic status: no link capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control 或 [root@localhost root]# mii-tool -w 21:20:33 eth0: negotiated 100baseTx-FD, link ok 21:20:33 eth1: no link
//mii-tool主要是用于配置网卡工作模式的指令，同时也可以进行查询、监控等工作！
2)ifconfig -a eth0 Link encap:Ethernet HWaddr 00:09:6B:09:08:FC inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::209:6bff:fe09:8fc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 // RUNNING表示up 3) 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: Yes Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 32 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: d Current message level: 0x00000007 (7) Link detected: yes //表示物理口up 4、linux查看网卡吞吐量，实时网络带宽 1）dmesg | grep -i eth 2) 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: Yes Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 32 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: d Current message level: 0x00000007 (7) Link detected: yes //表示物理口up 查看网络实时带宽 在linux的proc文件系统中，通过查看/proc/net/dev文件 可以得到每个网络接口的吞吐量，但是无法获得实时带宽 |
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