Hi Exports,
My Client wants to go with HA with SQL server 2012 by using following structure 
i have 4 OS
1 SAP client 1
2 DB instance 1
3 SAP client 2
4 DB instance 2
and he wants if my SAP Client 1 gets crashed then SAP client 2 will get connected automatically, if my DB instance get crashed then SAP Client 1 get connected to DB instance 2 automatically.
so Please give me the solution for this is it possible or not if yes please share me how to do this.