Customers with two or more VPS can implement redundancy solutions using IP failover. On Linux, this utilises software such as heartbeat and keepalived.
Setting up IP failover has two components: performing the necessary setup within mPanel, and then configuring your VPS operating systems to perform the failover.
To setup failover within mPanel for your two VPS - for example, vps1.example.org and vps2.example.org - start by logging into mPanel and go to the dashboard page for vps1. Next, click 'Change Plan' and add a second IP address to this VPS.
When the change is complete, click 'Services' and go to the dashboard page for vps2. Now, click the gear icon to open the drop-down list, and then 'IP Failover'. You will see a list of potentially "floating" IPs. Simply check the box to specify you want to allow the secondary IP to float between vps1 and vps2, and then restart your VPS.
At this point you can now log into your two VPS and configure your failover solution of choice.