Vagrantのエラーの改善方法

Question

下記のエラーが発生したので、解決方法を教えてください。

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: 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.

Answer 1

繰り返すことにより改善できました。