PPP services backup

Hi,

I have several Mikrotik PPTP/L2TP server installed in several locations. All these servers have different public IP and in different networks.
I normally configure my MT devices point to one PPTP/L2TP server to stablish a VPN with a PPTP/L2TP client. I want to find a crash PPTP/L2TP server plan.

However, I want to put PPTP/L2TP connections of backup. I want that the main PPTP/L2TP connection is active and the backup one is disabled. But when the main connection fails, the second PPTP is enabled automaticaly.
How can I configure this behaviour in my MT devices?

Thanks!!

One of the way how to accomplish this by netwatch.
You can specify main PPP server IP address to monitor.
Netwatch provides you with up/down script options, so when main PPP server is down,
down script is executed (two command one to disable main PPP connection, second command to enable second PPP connection), vice versa for up script.