I know there is details in the 2820 manual - but I was wondering if anybody had made a guide on the options available and setup senarios...

I am later going to try out a fall over setup in our office using 2 spare routers (2820 been the "master" with a 2800 as the "slave" on WAN2) but not quite sure on how it should be setup... would be nice to read a guide before i start playing and ripping my hair out!

Did you ever figure this out ?

It should be possible to do this by setting the 2800 up as the ADSL modem for WAN2 and to do that you should only need to enable PPPoE passthrough and stop it from connecting by unticking "Always On" and setting the idle timeout to 0. Then set the 2820's WAN2 up as you would with a Vigor 120.

This was a while ago - sorry for not updating...

But I setup the 2800 as a normal router, and to push out IP addresses via DHCP (im sure I could set this as fixed on the 2820 but didnt try as it was just to see how the fall over functioned),.

I told the 2820 that there was an ethernet device on the WAN2 port, left the internet access settings as they were and it just worked straight away without any other issues

If I had more time to play with the setup - im sure there would be a better way to manage it - im sure the posibilities for the setup of this are numerous...

So on the 2820, when you setup the WAN2 connection don't you have to define the isp logon details - was that not confusing given than the 2800 was logging onto the isp without help ? Also what about having 2 dhcp severs etc. Were they setup with different IPs?

Thanks

Dave

No..
the 2800 was dealing with the connection to the ISP and was acting as a normal router using PPPoA

the router was then connected to the WAN2 port of the 2820, which got an IP address from the 2800 (different range compared to the normal network) - having it setup like this should not cause a DHCP problem as the traffic is been routed - it just used the other router as a gateway....

I did not have to define the ISP login details on the 2820 for the 2800 on WAN2 for it to work.