linux查看介面串連狀態

linux查看介面串連狀態
 ethtool# ethtool em1Settings 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 em2Settings 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 statusConfigured devices:lo em1 em2 em3 em4 p3p1 p3p2Currently active devices:lo em1 port0 port1 vlan1 dummy1