linux 上网设置
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Supported ports: [ MII ]
??????? Supported link modes:?? 10baseT/Half 10baseT/Full?
??????????????????????????????? 100baseT/Half 100baseT/Full?
??????????????????????????????? 1000baseT/Half 1000baseT/Full?
??????? Supports auto-negotiation: Yes
??????? Advertised link modes: 10baseT/Half 10baseT/Full?
??????????????????????????????? 100baseT/Half 100baseT/Full?
??????????????????????????????? 1000baseT/Half 1000baseT/Full?
??????? Advertised auto-negotiation: Yes
??????? Speed: Unknown! (0)
??????? Duplex: Half
??????? Port: Twisted Pair
??????? PHYAD: 1
??????? Transceiver: internal
??????? Auto-negotiation: on
??????? Supports Wake-on: g
??????? Wake-on: d
??????? Current message level: 0x000000ff (255)
??????? Link detected: no
从上面可以看出eth0 处于连接状态，eth1没有连接
二. 查看网卡的配置
一般在linux下查看网络配置可以使用ifconfig命令，可以显示当前网卡的基本配置信息。
终端输入ifconfig 会出现一下内容：
eth0
Link encap:Ethernet HWaddr 00:0C:29:0C:4B:0F
inet addr:192.168.37.128 Bcast:192.168.37.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:33 errors:0 dropped:0 overruns:0 frame.:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2823 (2.7 Kb)
TX bytes:2722 (2.6 Kb)
Interrupt:10 Base address:0x1080
他们分别表示：
Eth0：网络接口
link encap:网络类型
HWaddr:网卡物理地址
Inet addr ：IP地址
Bcast：广播地址
Mask：子网掩码
UP：正在使用的网络接口
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