How to failover the cluster ?

How to failover the cluster ? GNU/Linux

By which command,

My Linux version

2008 x86_64 x86_64 x86_64 GNU/Linux

What are the prerequisites we need to take while failover ?

if any

Regards

No Luck,

Any one, Did any details required in my questions

?

---------- Post updated at 05:02 PM ---------- Previous update was at 04:35 PM ----------

[LEFT]My Linux version

Red Hat Enterprise Linux Server release 5.2 (Tikanga)

Regards

[/LEFT]

Setting up a load balancing cluster with director failover based on Keepalived, LVS and Gentoo

The command required to cause the cluster to failover depends on what clustering software you are using?
How do you know it is a clustered system?
Do you know any commands, like for instance the command to show the cluster's status?