Load balancing

[MBreve]

I've tried several configurations for ISP redundancy to solve our bandwith problem by trying to offload our 2Mb SDSL with an extra 6Mb ADSL line.

This works fine for all clients which should use it for browsing and downloading but our servers and VPN connections fail because of the different NAT addressen.

The reason is our strange network configuration, it's a 16 bits network (10.10.0.0 255.255.0.0).

The 10.10.1.0 is used for our servers and the 10.10.2.0 for our clients.

I know I should fix this but the impact is so large that it will take a year before we're ready for this.

I've tried the Automatic NAT not for the whole 16 bit segement but one IP address. So, for my computer I setup ISP with just one host with Automatic NAT.

This works fine for my laptop which switches to the ADSl line, but again the servers and VPN's fail.

Can anybody confirm that ISP redundancy only works with the full network segment?

Or does anybody have an idea on how to let the clients use the 6Mb ADSL while the servers and VPN keep using the 2Mb SDSL?

[Porter]

maybe sourcerouting could help you:

Force one ISP with ISP REDUNDANCY