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    ubunut 千兆网卡的疑问
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    我有一个ubuntu物理机,上面安装了两个网卡,现在网线插在了百兆网卡上enp2s0,千兆网卡网口enp1s0没插网线,可是查看enp1s0却显示是10Mb/s.
    相关使用的命令如下,enp1s0是千兆网卡,enp2s0是百兆网卡.

    root@sangfor-System-Product-Name:~#  cat /sys/class/net/enp1s0/speed 
    10
    root@sangfor-System-Product-Name:~# cat /sys/class/net/enp2s0/speed 
    100
    
    root@sangfor-System-Product-Name:~# ethtool enp1s0
    Settings for enp1s0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 10Mb/s
        Duplex: Half
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                       drv probe ifdown ifup
        Link detected: no
    
    
    
    
    root@sangfor-System-Product-Name:~# ethtool enp2s0
    Settings for enp2s0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Half 1000baseT/Full 
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full 
                                             100baseT/Half 100baseT/Full 
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                       drv probe ifdown ifup
        Link detected: yes
    root@sangfor-System-Product-Name:~# 
    

    求解这是为什么?

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