Dual WAN load balance mode doesn't do failover

[ManuCH]

I've been experimenting with Dual WAN lately and I've had mixed success.

What I'm trying so far is to use load balance mode. It works fine and I was able to set up some specific routes as well.

Unfortunately, when in load balance mode, if the Primary WAN fails, there is no failover to the Secondary WAN. The router keeps trying to load balance traffic, ignoring the fact that the Primary WAN is down (and it even shows correctly as down in the Network Map).

Question: is this by design? Shouldn't load balance also include the failover feature, and disable Primary WAN in routing when it goes down?

The only work-around I've found is to manually enter the following when my Primary WAN goes down:

ip rule add from all lookup 200
ip route flush cache

Of course that's not a real solution, especially if I'm not home and someone else in the house (who is not familiar with those things) experiences a failure.

I'm using an RT-AC3200 running Merlin 380.57.

Has anyone tried this setup and experienced the same issue? Is this by design?

Any work-around or fix suggestion is appreciated

 

[Martineau]

I've been experimenting with Dual WAN lately and I've had mixed success.

What I'm trying so far is to use load balance mode. It works fine and I was able to set up some specific routes as well.

Unfortunately, when in load balance mode, if the Primary WAN fails, there is no failover to the Secondary WAN. The router keeps trying to load balance traffic, ignoring the fact that the Primary WAN is down (and it even shows correctly as down in the Network Map).

Question: is this by design? Shouldn't load balance also include the failover feature, and disable Primary WAN in routing when it goes down?

The only work-around I've found is to manually enter the following when my Primary WAN goes down:

ip rule add from all lookup 200
ip route flush cache

Of course that's not a real solution, especially if I'm not home and someone else in the house (who is not familiar with those things) experiences a failure.

I'm using an RT-AC3200 running Merlin 380.57.

Has anyone tried this setup and experienced the same issue? Is this by design?

Any work-around or fix suggestion is appreciated

DUAL WAN has (apparently) got better but sadly management of the interfaces isn't perfect as still evidenced in the latest Official RT-AC68U firmware release:

ASUS RT-AC68U Firmware version 3.0.0.4.380.1031
- Release Notes –
- Fixed dual wan ping time watch dog issue which might cause .false fail over to secondary wan.

...but surely if your ISP was more reliable then there should be no need for failover ?

So no idea if the RT-AC3200 is similarly affected by an unreliable watch-dog issue?

So sadly (for your own sanity) you will probably have to resort to a cron job to manually detect if a WAN is DOWN and modify the default route for table 100/200 as you have described

 

[stylish_me]

@ManuCH I've got lots of problems with watchdog as well. It's actually not working ))