vagrant up error occurred ”Failed to connect to VM!"

症状

 $ vagrant up [default] VM already created. Booting if it's not already running...
[default] Clearing any previously set forwarded ports...
[default] Forwarding ports...
[default] -- 22 => 2222 (adapter 1)
[default] Creating shared folders metadata...
[default] Clearing any previously set network interfaces...
[default] Preparing network interfaces based on configuration...
[default] Booting VM...
[default] Waiting for VM to boot. This can take a few minutes.
[default] Failed to connect to VM!
Failed to connect to VM via SSH. Please verify the VM successfully booted
by looking at the VirtualBox GUI.

対処

ダウンロードしてくるboxを x86_64 ではなく、i386 のboxにしてみる。