Sounds like you need a load balancer that can control 2 servers. You can try Barracuda, but they might be a little pricey so I'd say go with Kemp Technologies or F5. Kemp has affordable and good quality balancers and so does F5 load balancers.
My company and I have recently had server issues where we are getting swamped with traffic. I was told to look into load balancers to help balance out the traffic going in and out of the business. Being that we are a small to medium business, we are looking for a high quality, low cost load balancer to help level the servers.

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