I need some advice on network design of a multi-site network (high level ). Here's what we need to do:
We will be hosting 24/7 web based transaction processing site(s) that requires high availability. We need to have the ability to failover between sites (data centers) in the event of a network failure, etc..For example if site A hosts money.domain.com and experiences a service interruption, we need a seamless redirection of traffic for money.domain.com to site B (web and data servers at both locations).
This is all new territory for me, but my initial idea would be the following:
Have 2 physical data centers A & B, with large pipe/tunnel between them, which each hosts replicated web servers and clustered SQL boxes. Then use a Cisco Global Site Selector (GSS) network to manage/direct the traffic to site A or B in the event of an outage.
From a high level does this sound feasible? Any suggestions or things to avoid? Any advice is greatly appreciated.