Networking Help with Backup server

i need someone to guide me or tell me which article show step by step for server back with redudancy ok what i mean by that is i have 2 box with same stuff but if one box is dead the other will take over i heard about clustering i;m not sure but i need someone to help me till i made it thanks and also how to make that the ip wont conflict with others ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform network