Unable to get back to machine after restart

[farazhkhan]

Followed all-in-one steps for Ubuntu 16.04. all goes smooth and well and everything works fine until I restart machine for any reason.

After restart I loose all the changes including defined in Horizon UI [https://bugs.launchpad.net/bugs/1672741] and then after almost 5 to 10 minutes I loose access to machine unable to PING it.

When login to machine physically I can see it can PING google.com and internet is working fine on machine itself and it can go outside but I can't login to Contrail UI or OpenStack UI in fact can't PING it from outside.