，答案就埋藏到本节中的原始文件的：

The answer lies buried into this section of the original documentation:

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enhanced-networking-linux

在简单地说，CentOS的7艘已经与ixgbevf模块，虽然没有采用最新的版本，但是这是很难的一个问题。是什么造成了我的情况下是无法访问后，重新启动是在predictable网络接口，默认情况下启用。

In a nutshell, CentOS 7 already ships with the ixgbevf module, although not with the latest version, but this is hardly a problem. What was causing my instance to be unreachable after a reboot were the "predictable network interfaces", enabled by default.

要禁用它们，只需访问该链接，跳转的直接步骤6号和类型：

To disable them, simply visit that link, jump straight to step number 6 and type:

$转-qa | grep的-e'^ systemd- [0-9] \ + \ | ^ udev- [0-9] \ + $ sudo的sed的-i'/ ^ GRUB \ _CMDLINE \ _linux / S / \$ / \网络\ .ifnames \ = 0 \/的/ etc /默认/平头 $ sudo的GRUB2-mkconfig -o /boot/grub2/grub.cfg

$ rpm -qa | grep -e '^systemd-[0-9]\+\|^udev-[0-9]\+' $ sudo sed -i '/^GRUB\_CMDLINE\_LINUX/s/\"$/\ net\.ifnames\=0\"/' /etc/default/grub $ sudo grub2-mkconfig -o /boot/grub2/grub.cfg

之后：

1. 停止实例
2. 通过AWS CLI启用增强的网络
3. 重新启动

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