When Wan 1 is down all WAN 2,3 all lagging.?

Hi…
Current Set up
BLP 305
WAN1 64 Static ip Line FFTTN ISP A Always on—> LAN ips
WAN2 None static ip line FTTN ISP A Always on
WAN3 64 Static ip Line FFTN ISP B-----> using as back up.

All WAN1 ips are used to LAN clients ips.
Issues.
Just found out that WAN1 is down all LAN client internet is down and Bell modem configuration site come in.

My question is Can I make Back up WAN3 to WAN1 when is getting slow or down ?
How do I make that kind options.?
P.s inbound traffic is download or Outbound is Download?
I want to make all client internet access no restiction and the most compatible mode… how do I set this up…

Thank you.
Still a lot to learn.
Thank you for having me a great product.

Anything can be helpful.

Hi,

  1. Can I make Back up WAN3 to WAN1 when is getting slow or down ? How do I make that kind options.?
    Believe there is some problem on your Outbound Policies. Traffic should go WAN2 when WAN1 is down based on your current setup. Please check.

  2. Inbound traffic is download or Outbound is Download?
    This is inbound traffic: User > Internet > B305 > Server on LAN

  3. I want to make all client internet access no restiction and the most compatible mode… how do I set this up…
    Ensure no blocking on Outbound Firewall. Basically default settings are the most compatible mode.