vagrant upを実行すると下記のエラーが発生して、仮想マシンが立ち上がりません。
仮想マシンを動かすにはどのようにすればよろしいでしょうか。

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'bento/centos-6.8' could not be found. Attempting to find and install...
    default: Box Provider: virtualbox
    default: Box Version: >= 0
==> default: Loading metadata for box 'bento/centos-6.8'
    default: URL: https://vagrantcloud.com/bento/centos-6.8
==> default: Adding box 'bento/centos-6.8' (v2.3.4) for provider: virtualbox
    default: Downloading: https://vagrantcloud.com/bento/boxes/centos-6.8/versions/2.3.4/providers/virtualbox.box
==> default: Box download is resuming from prior download progress
    default: Download redirected to host: vagrantcloud-files-production.s3.amazonaws.com
    default:
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.

OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 10054