查看Linux下网卡连接状态(up还是down)?

第1种方法

     [root@localhost /]# 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
           RX packets:106732953 errors:0 dropped:0 overruns:0 frame:0
           TX packets:104379788 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:2351331877 (2.1 GiB) TX bytes:391707945 (373.5 MiB)
           Base address:0x2500 Memory:fbfe0000-fc000000
    eth1     Link encap:Ethernet HWaddr 00:09:6B:09:08:FD
           BROADCAST MULTICAST MTU:1500 Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
           Base address:0x2540 Memory:fbfc0000-fbfe0000



[root@localhost /root]# ifconfig
eth0       Link encap:Ethernet HWaddr 00:19:DB:41:08:1B
           inet addr:211.100.10.235 Bcast:211.100.10.235 Mask:255.255.255.255
           UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
           RX packets:178812 errors:0 dropped:0 overruns:0 frame:0
           TX packets:153415 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:100
           RX bytes:33094019 (31.5 MiB) TX bytes:71911163 (68.5 MiB)
           Base address:0x8f00 Memory:fd6e0000-fd700000

eth1       Link encap:Ethernet HWaddr 00:19:DB:41:08:1C
           inet addr:192.168.1.115 Bcast:192.168.1.255 Mask:255.255.255.0
           UP BROADCAST MULTICAST MTU:1500 Metric:1
           RX packets:13805 errors:0 dropped:0 overruns:0 frame:0
           TX packets:11356 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:1520439 (1.4 MiB) TX bytes:5406527 (5.1 MiB)
           Base address:0x7f00 Memory:fd2e0000-fd300000

eth2       Link encap:Ethernet HWaddr 00:19:DB:41:08:1D
           inet addr:202.194.99.62 Bcast:202.194.99.62 Mask:255.255.255.255
          UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
           RX packets:158024 errors:0 dropped:0 overruns:0 frame:0
           TX packets:182280 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:74748049 (71.2 MiB) TX bytes:33535454 (31.9 MiB)
           Base address:0xdf00 Memory:fdee0000-fdf00000

lo         Link encap:Local Loopback
           inet addr:127.0.0.1 Mask:255.0.0.0
           UP LOOPBACK RUNNING MTU:16436 Metric:1
           RX packets:99 errors:0 dropped:0 overruns:0 frame:0
           TX packets:99 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:12978 (12.6 kiB) TX bytes:12978 (12.6 kiB)

第二种方法,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


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