hi all.
i'm a newbie,
I have a problem with Loadbalancer, I have 3 Wan PPOE and when running it only runs 1 Wan, the other wan only run when Wan 1 down.
help me Pls. Thanks!

Check out this presentation from one of The Brothers Wisp members Tomas Kirnak: Bandwidth-based load-balancing with failover. The easy way.

Tomas shows a few different approaches to doing this. Hopefully this will give you some ideas for your implementation