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I was trying to ask this to tech support, but they just closed the chat after reading the question - my first experience with TP-Link tech support!

I own this TL-480T+ recently and was trying to use it between two internet connections - WAN1 as primary and WAN2 as backup. WAN1 has a daily data cap, and after that it disconnects from internet - basically ping failure will happen (to 8.8.8.8, which I manually configured). Then it is expected to switch to backup. This works as expected and WAN1 will be marked as "Online detection failed" - which is perfectly true.

The issue is at midnight, once the data cap is reset, ISP connected to WAN1 will be again active. The test IP address 8.8.8.8 will ping again. However, the router won't honer that and stays forever as "Online detection failed". I need to go, disconnect WAN2 cable to force it back to WAN1. This is not what is expected.

Do anyone else have this problem? I do manual online detection, only using ping to 8.8.8.8. DNS lookup based online detection is disabled on purpose. The ISP CPE has captive portal, which spoof any DNS request (while disconnected from internet) and respond back with its own IP - which will trick the router unless I disable it.

I could have lived with this issue if there was a shell based or API based facility to disable/enable selected ports. I should have configured a script post midnight to disable backup WAN for few seconds to wake up primary and then enable backup - however I don't see any way to disable/enable ports except physically disconnecting the cable. Is there any such facility which I am missing?

Regards,

Sreejith