currently I have an SDSL and an ADSL on 2 netgear routers from two different providers. We use the ADSL as a backup when the SDSL goes down. The problem is that we have to manually move the connection and also change all the IP's and firewal rules when this happens and then put it all back when the SDSL comes back online.
I'm thinking of getting a Cico 1841 with WIC-1SHDSL-V3 & HWIC-1ADSL modules to manage the failover.
the SDSL provider has advised that they can also provide an ADSL connection coming from a different gateway which means that the IP's will always stay the same as they are assigned on authentication whether using SDSL or ADSL.
my question is, if i stick with having two different providers rather than go with the same provider can the 1841 handle the ip changes? there is a sonicwall firewall after the router that handles all the rules and VPN's.