It is possible to setup cluster in Windows server 2008 R2 Standard edition.... Because for me in Server manager --> Add feature --> check box for fail over cluseter, feature is not comming. Please help me on this.

It is possible to setup cluster in Windows server 2008 R2 Standard edition.... Because for me in Server manager --> Add feature --> check box for fail over cluseter, feature is not comming.Please help me on this.