Cisco SA520 & ADSL issues

[Haggisman]

Now I'm probably being a major dunce here, and when someone posts the solution I'll kick myself, but I really can't get this to work.

Current scenario: we have 2 separate ADSL internet connections coming into the office, via 2 routers (1x Netgear DG834, 1x Linksys WAG354G).

I have a Cisco SA520 sitting in the rack, that my predecessor basically pointed it and said "sort it".

What I'm trying to achieve is have the 2 internet connections go into the SA520 via the WAN and optional ports (set to secondary WAN), set up to switch over to the secondary WAN if the first drops out. I'm also hoping to use the built in VPN functionality of the SA520, although the ADSL is the main concern at the moment.

I have both routers connected to the SA520 with crossover cables - they see each other fine, the routers can connect to the internet fine, however the SA520 cannot connect to the internet through the routers.

I'm leaning towards one of 3 possible problems:

1) Configuration is wrong on either the router or the SA520 or both (most likely scenario).
2) I need to ditch the routers and get a couple of ADSL modems (2nd most likely scenario).
3) The SA520 has built in ADSL modem(s) and so I need to plug it directly into the line (unlikely, as I can't find anything anywhere which states it has this).

As a bit of extra info, the primary ADSL connection (the Netgear router) is through BE, and has a static address, doesn't require a username/password. The secondary (Linksys router) is through BT, and has a DHCP allocated static address, this requires a username/password.

Any suggestions/guides from someone who has set up something similar before would be hugely appreciated, as I can't see where I'm going wrong.

Thanks!

Edit: I have also tried the Netgear in Modem only mode, with no joy: http://vpncasestudy.com/download/DG/DG834_Tips100.pdf

 

[kerrgreg]

Thats strange that the BE connection doesnt need PPPoA to work.

Can the SA520 see the routers fine?

Personally from my experience of this type of set-up although i wasnt using SA520 but was using cisco ADSL devices.

You need to disabled all DHCP and other router functions, personally I would use the DG834 in modem mode I have done this many ,many times very sucessfully and it means you can dial it from the SA520 using PPPoE which in effect brings your wan into the SA520 and you should be able to assign the wan IP.

EDIT: removed lie...

 

[Haggisman]

Thats strange that the BE connection doesnt need PPPoA to work.

Can the SA520 see the routers fine?

Personally from my experience of this type of set-up although i wasnt using SA520 but was using cisco ADSL devices.

You need to disabled all DHCP and other router functions, personally I would use the DG834 in modem mode I have done this many ,many times very sucessfully and it means you can dial it from the SA520 using PPPoE which in effect brings your wan into the SA520 and you should be able to assign the wan IP.

EDIT: removed lie...

Yup the SA520 sees both routers (lights on front and Link state: "Link Up" under status) but WAN state is always "down", even with the DG834 in modem mode (although I only tested this very briefly, as it was getting close to office hours!)