Base on the description, the new connections should flow using mobile WAN if WAN1 is congested. Can you please redefine your test case by make sure the WAN1 is congested ? Beside that, possible to let us know what network protocol is used when downloading the 50MB file? (HTTPS or HTTP)
If you still having issue for the outbound policy, please open a support ticket here
My understanding is that the rules for overflow only work based off of the WAN settings. So if your connection is normally 512kbps and it is set up that way in the router, then the router won’t apply overflow rules until it reaches 512kbps. The router doesn’t know your ISP has throttled your connection to 256kbps and so it won’t switch to another WAN. I’m curious to know if I am wrong here.
Your understanding is correct. In order for the overflow algorithm to work correctly the correct up/down speed settings on the WAN setup page need to match what the carrier is providing.
Two issues that we need to take consideration here:
WAN “Upload & Download” Bandwidth can’t be dynamically/automatically defined base on the available bandwidth when ISP perform throttling (Quota limit reached)
Connections will still be forwarded using ADSL (WAN1 & WAN2 connections) when the throttled WAN usage is low.
Please consider to enable “Bandwidth Allowance Monitor Setting” for the ADSL connections. You can get notified when usage hits 75%/95% of monthly allowance by enabling Email Notification & disconnect the ADSL WAN when usage hits 100% of monthly allowance.
With this setting, you can make sure that the ADSL WANs will not being used when quota limits reach to avoid the above mention issues.
For more information regrading to the Bandwidth Allowance Monitor Setting, please refer to the attached screenshot
Base on the earlier post, you are concerned on the ISP throttling when WAN Quota limit reached.
I believe you miss understood the usage for overflow algorithm.
Overflow - Traffic will be routed through the healthy WAN connection that has the highest priority and is not in full load. When this connection gets saturated, new sessions will be routed to the next healthy WAN connection that is not in full load.
Please understand the saturated word correctly for the above statement:
Example:
WAN1: 256kbps up/256kbps down (Available Bandwidth)
Mobile USB: X up /X down
Saturated mean if WAN 1 is utilized 85%-95% for the available bandwidth then the new connections will start to forward using mobile USB. If the WAN1 utilization when below 85% then new connections will forward back using the WAN1 link.
For your case, the saturation is on ISP level, thus the overflow algorithm will not help detect such saturation.
No, I am not concerned with WAN Quota or ISP throttling.
Please forget about throttling and assume I have a 256/256 kbps WAN1 connection.
Those are the speeds I have entered into Wan1.
Those are the speeds I’m actually getting.
Now, to use your words:
“Overflow - Traffic will be routed through the healthy WAN connection that has the highest priority and is not in full load. When this connection gets saturated, new sessions will be routed to the next healthy WAN connection that is not in full load.”
WAN1 is now saturated, new sessions are NOT being passed to the next healthy WAN, ie Mobile Internet.
Do note that when you defining the WAN download/upload speeds this will bandwidth limit the available upload speed for the WAN to 256kb. Thus when you perform speedtest using WAN1, you will only get 256kb upload speeds.
Let’s follow up using using support ticket , as this will allow us to have better channel to diagnosing the issue.
