We have a small network with 5 servers hosted in a datacenter. We have a single network connection from our upstream provider going into a Sonicwall Pro 300. This connects to our Netgear FSM726 Switch --> to the servers. We also have a Cisco 2950 sitting on a shelf, since it locked up once (was loaded with verson 12.1 software) and needed to be reset. Either way, we are looking to get an additional provider for redundancy. We are NOT planning to do BGP or anything as it seems way too complex and we have only a few IPs so we cannot justify a /23.
The network is NATed and I would like to have 1 IP from each provider map to a single IP for the internal website/email server. ie -- 10.0.0.1 maps to 126.96.36.199 and to 188.8.131.52. I have no idea if this is possible. Also, I have no idea where I would place the sonicwall in this situation. As of now the Sonicwall is doing NAT--I would assume that if there are multiple providers I would need to do NAT somewhere else (router).
We push an average of 5 megs, but the sites need to be highly available -- hence the redundancy. What kind of equipment should we get. I would rather a simple device -- I even saw a Netgear load balanced dual wan router that has 90mb capabilities wan to lan -- more than enough for us. There is also a Xincom product as well. I am not so sure about these devices reliability -- and obviously it would be worse to have a bad device than to have an hour or 2 of downtime once in a while. I would imagine a Cisco device would be the best.
Please suggest the best (and most cost-effective) solution to execute this plan. We do not want to spend thousands of dollars.