we are installing a second ADSL line to an office, for two reasons,
1) If one line falls over, maybe due to lightning strike - whatever - some sort of temporary physical layer problem - Then we would like to not loose internet connectivity _ Our local telecomms service tell us that we have two seperate wires back to the exchange, therefore knocking out one will not effect the over.
2) Would like to achieve - simple load balancing - IE. some PCs use one ADSL router - others use the second.
What I propose is as follows -
a) Each adsl router is set up with a different range of DHCP addresses so that they do not assign addresses in the same range.
b) Each connecting PC is set up with primary and secondary DNS entries - The primary address for each PC will point to the router designated to that PC. The secondary address will point to the fallback router (adsl line) for that PC, therefore if we swap over the primary and secondary addresses for half of the PCs we should achive rudimentary load balancing and fall back capability.
Will it work ?