I have a 2820 with both slow DSL and fast cable WANs. I'd like to have all outgoing connections directed to the faster WAN2 cable port with WAN1 DSL available for WAN2 failover. However I'd like the WAN1 not to disconnect and await a failover but to remain connected and available to incoming sessions initiated from the WAN side.

I've tried various settings of Load Balance, both Auto Weight and According to Line Speed, and entered both accurate and absurdly exaggerated values of line speed but if WAN1 is set to Always On I can not find any way to suppress some outgoing connections going to WAN1, which is damaging when the underlying application is a bandwidth hog.

Any advice?

And same question for my 2920.

Thanks.

I've got pretty much the exact same setup with one of my routers, this is how to do it:
http://www.draytek.com/user/SupportFAQDetail.php?ID=2034

Many thanks, I've just done the same and will await the result.

Is this "ip route default" setting/interrogation absent from the http:// GUI?

yep, it's telnet interface only