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当我尝试通过官方文档设置 Docker 1.9 来制作覆盖网络时，会出现如下错误消息：

root@c0-master:~# docker run -d --name webtest --net myStack3 nginx
a5aec996da782669bc26e5c33064bf6c14ee452a56b1a519136d47c2b9d59859
Error response from daemon: Cannot start container  a5aec996da782669bc26e5c33064bf6c14ee452a56b1a519136d47c2b9d59859: subnet sandbox join failed for "10.0.2.0/24": vxlan interface creation failed for subnet "10.0.2.0/24": failed in prefunc: failed to set namespace on link "vxlan48c4dd7": invalid argument

Docker 网络只显示这些简单的消息：

root@c0-master:~# docker network
docker: "network" requires a minimum of 1 argument.
See 'docker network --help'.

Usage:  docker network [OPTIONS] COMMAND [OPTIONS]

Commands:
  disconnect               Disconnect container from a network
  inspect                  Display detailed network information
  ls                       List all networks
  rm                       Remove a network
  create                   Create a network
  connect                  Connect container to a network

Run 'docker network COMMAND --help' for more information on a command.

我记得当我使用 flannel 设置覆盖网络时，它有 etcd 文件和 flannel 文件来指出子网的范围。

我认为这个错误的原因。

docker1.9&swarm如何设置？

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