We currently have two Freeswitch servers sharing a MariaDB.

The plan is to have both server be an HA pair, so if we lose one server the other take over the active calls without dropping them.

I have read online several ways of doing this, but most of them include using a floating IP.  The problem with that is we would need to change our IP's and at this point we dont have that option.  

Is there a different approach to doing this?  And if so could you send me an article or point me in the right direction?

thanks,