IP redirection in Cluster

Hello!

I use this tut. http://www.howtoforge.com/installing-a-web-email-and-mysql-database-cluster-on-debian-6.0-with-ispconfig-3

But as I understand if master goes down, I am need to setup my router for slave server.
Can I solve this tutorial issue by using heartbeat? How it will works with ISPCOnfig?

Thank you.