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linux查看接口連接狀態

linux查看接口連接狀態
  ethtool # ethtool em1 Settings for em1:         Supported ports: [ TP ]         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 pause frame use: Symmetric         Advertised auto-negotiation: Yes         Link partner advertised link modes:  10baseT/Half 10baseT/Full                                               100baseT/Half 100baseT/Full                                               1000baseT/Full          Link partner advertised pause frame use: No         Link partner advertised auto-negotiation: Yes         Speed: 1000Mb/s         Duplex: Full         Port: Twisted Pair         PHYAD: 1         Transceiver: internal         Auto-negotiation: on         MDI-X: off         Supports Wake-on: g         Wake-on: d         Current message level: 0x000000ff (255)         Link detected: yes # ethtool em2 Settings for em2:         Supported ports: [ TP ]         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 pause frame use: Symmetric         Advertised auto-negotiation: Yes         Speed: Unknown!         Duplex: Unknown! (255)         Port: Twisted Pair         PHYAD: 2         Transceiver: internal         Auto-negotiation: on         MDI-X: Unknown         Supports Wake-on: g         Wake-on: d         Current message level: 0x000000ff (255)         Link detected: no   network # /etc/init.d/network status Configured devices: lo em1 em2 em3 em4 p3p1 p3p2 Currently active devices: lo em1 port0 port1 vlan1 dummy1  
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