RT-AX86U-Pro, WAN disconnect every 36 hours

[Tech9]

Try the suggested above change - ISP Gateway in Router mode. I'm surprised you never tried it by now. Your Asus router is most likely the issue. Some folks around replaced their own router with different brand/model after fighting with the same issue for months just like you.

 

[Nick24]

I've put the ISP modem in Router mode. Added the Asus router in a DMZ. I'll see how that goes.

If this is a known issue with Asus, is there some workaround I can do with like a like a script or is this really a case of moving on to a better router? What is a good router with similar features that Merlin has on Asus?

 

[Tech9]

I'll see how that goes

See how it goes first. Many folks are using this workaround, many folks don't have bridge mode on the ISP equipment available. They all continue using their Asus routers.

 

[Nick24]

Small update. Been running the ISP modem in router mode with the Asus in a DMZ for the last 2 days 21 hours. No issues so far.

 

[Tech9]

You're lucky to have ISP provided Gateway and not a Modem only. Otherwise when this issues happens you have to replace the router. We had a case like this not long ago, after few modem replacements the thread starter replaced the router with different brand/model.

WAN Reconnect Problems Across ASUS Routers / Firmware Versions

Problem description: ASUS router sometimes does not attempt to reconnect WAN connection (or silently fails--nothing in log files) after outage even after modem comes back up. Steps to reproduce: Intermittent, so inconsistent. Disconnect modem and reconnect (unclear if manual modem disconnect...

www.snbforums.com

There are variations of this issue, but most often ISP equipment incompatibility related.

 

[Nick24]

For future readers. So my issue seems to be resolved. Switching the ISP provided XB7 modem into router mode was the solution.

 

[Nick24]

I thought I should update this post in case someone else stumbles upon the same issue. I didn't like the idea of running the modem in router mode, and my ISP refused to believe they were the source of the issue. So what I ended up doing was paying cash on FB marketplace for someone selling a barely used XB7 modem (with a different model number). It took a few days to convince my ISP (Videotron) to transfer over my service to the new modem without a tech coming to my house (and paying for the visit). Eventually they did it over the phone. The new modem is a Technicolor version:

I've been running with this new modem, but everything else the same (router, ethernet cable, equipment placement) for over a year now. 0 issues. So in the end, the modem was the issue, but my ISP doesn't have mechanisms in place to help resolve the issue. My old modem was under warranty, but according to them nothing was wrong with it.