Hey to all I have a TL-R480T+ Ver 5 and I conf that option too, with the failover and I think because of that my Wan2 goes down after a period of 10 minutes of activity. If that is so, Pls confirm...

I Have a the same issue on my TL-R480T+ Thank you in advance before I fix it in my office so I will give U a feed back as soon as I see it working. See you soon.. Franklin