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Redundant Internet Connections

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by jmoody76

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We are using a DSL connection with static IP addresses and would like to add a Cable Internet connection for redundancy. It is a small network all Windows workstations, 1 NT 4 server and using NAT at the DSL router. We would like it to be as easy as possible to switch over and if it can be done automatically that would be nice however our budget is fairly small. We just need outbound traffic for now when one goes down. The Cable provider only offers DHCP but I don?t think that will be a problem since we download our email from our ISP via POP3 but we do use a VPN which would be down until the DSL comes back up but that we can deal with. Any ideas on what we can do? Thanks.

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by briantruitt

I had a bunch of stuff written before seeing that you were using your DSL router. Put another router behind your DSL router like a Linksys, Netgear, or whatever to keep your LAN independant of a Internet connection (just in case you were using DHCP off of the DSL router). You can plug your DSL router LAN port into your Linksys WAN port or if it goes down, plug your Cable modem into the Linksys WAN port. Or you could just have two internet connections on your LAN at the same time, one at .1 and the other at .254. Say the DSL, .1, goes down, you could switch everyone over to .254 with a batch script that would switch their default gateway. As far as your VPN goes, you could use a dynamic dns service like no-ip.com to monitor which Internet connection is up and can be used. I hope this makes sense and hope it helps.

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