使用scp传输时速度特别慢的问题

场景：在生产环境中，新安装的服务器，第一次使用scp传输文件时，速度大约在10MB左右，传输文件在同一个网段，正常应该在100MB左右。

mysql@localhost ~]$ sudo 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
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x000000ff (255)
        Link detected: yes

解决方法：service network restart

注意：在启动网络服务之前需要修改/etc/sysconfig/network-scripts/ifcfg-eth0中的ONBOOT=no为ONBOOT=yes，否则启动时无法成功！