We have one ISP , one router and one Firewall .
We are going to buy another ISP , Router , Firewall .
Can somebody tell how to create a redundancy
1.One ISP fails internet should go thru the other ,
2.One router fails the other will take over
3..One Firewall fails other will take over
Can some body give me some links or explain the network arc in brief so that I can work on it.