How do I configure Dual WAN on Cisco 1721 for sharing bandwidth and failover?
Posted on 2010-08-25
I have a Cisco 1721 with a Wic1-ADSL and a WIC 4ESW installed. I have DSL service and fixed-wireless service. I have a /29 for both connections. I would like a config which bundles both connections to share the bandwidth, but also will allow for all traffic to pass to one or the other in case of failure. I have another device in the house which provides DHCP, wireless, etc so if the combination would just feed a single private IP address (172.30.30.1/30 for example), I can setup my internal router to do the rest.
I currently have the router configured (not by me) to use the fixed-wireless connection full time, and only failover to the DSL if the wireless goes down. This works fine, but I hate to pay for the DSL which I will only use a couple times a year in this method. It would be much better for me if I used both connections concurrently and it would failover to using a single connection in the event that either would fail.
I can provide current config details if necessary, but can anyone help me with this config?