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Uplink monitoring and failure scenarios

Charlie E

I've currently got a site configured with two WANs:

One primary fibre-based connection, and one backup cellular connection to be used ONLY when the primary WAN is down.  I've configured automatic uplink monitoring and set both interfaces to active in the correct order (explained below).  I've then set the "weight" to 100 on the fibre WAN and 0 on the cellular WAN.  I've set the "scheduler" to 5 minutes. 

Now this works just fine if I pull the plug on the fibre WAN - it starts using the cellular WAN without issue. 

I'm wondering if this setup will also work if the ISP on fibre WAN has no connectivity (but the link is still up)?  Will it switch to the cellular WAN in this failure?  What about if the fibre WAN is just running unusually slowly? 

 

(*I must set both to active due to a hardware limitation on the cellular connection.  If the ethernet link is not maintained the cellular device turns off, so can't working in active/standby mode). 



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    If link is up but there is no connectivity the switchover should be triggered, because the check will test the reachability of some servers or sites predefined by sophos. You could define a list of your own, but default will do it in most cases.

    But I think that will not trigger if the connection just runs slowly.

    Best

    Alex

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