查看Linux下网卡状态或是否连接

╰+哭是因爲堅強的太久メ 2022-08-09 14:45 161阅读 0赞

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)   
     \[root@localhost /\]\# /etc/init.d/network status  
      Configured devices:  
      lo eth0 eth1  
      Currently active devices:  
      lo eth0  
     等同于  
     \[root@localhost root\]\# service --status-all  
      ............  
      ............  
      Configured devices:  
      lo eth0 eth1  
      Currently active devices:  
      lo eth0  
      ............  
      ............  
   3)ifconfig -a  
    \[root@localhost /\]\# 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

4)ethtool

\#ethtool eth0  
Settings for eth0:  
        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: 100Mb/s  
        Duplex: Full  
        Port: Twisted Pair  
        PHYAD: 1  
        Transceiver: internal  
        Auto-negotiation: on  
        Supports Wake-on: g  
        Wake-on: d  
        Current message level: 0x000000ff (255)  
        Link detected: yes

\#ethtool eth1

Settings for eth1:  
        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