Hi,

RTP FO is possible, e.g. with keepalived+rtpengine+Redis as people suggested.

Here's the guide for configuring it which I find very useful:

A possible way is to have a pair of rtpengine instances in master-slave setup. When master goes down, RTP continues on slave (new master) after a few seconds gap, when the virtual IP(s) migrate over.

Another useful link: