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WAN Drops every 20 mins after Xfinity did some overnight maintenance.

Suzib6sw

Regular Contributor
Till yesterday , my RT-AX86U Pro (with two RT-AX58u aimesh nodes) all running the latest Merlin firmware, was rock solid. However after Xfinity did some overnight maintenance, the WAN drops every 20 mins almost to the second and is shown in the System log. There is nothing else (set to info or debug) to indicate other potential reasons for this happening in the log. Connecting directly to the Hitron Coda56 Modem and pinging google, did not show any problem except I could only ping IPV6 addresses and not IPV4.
I re-flashed the router, rebooted, (didnt reset) both the routers and modem, Ran Ping against Google, and observed the losts packets every 20 mins that co-incided with the stem logs. I checked the corrected and uncorrected data in the Coda56 and they seemed ok.
In a last ditch attempt to fix this, I turned off IPV6 on the Router and rebooted and since then, no dropped Wan.. I do use DDNS, but the reset of the setup is pretty vanilla.. About 60 devices inc IOT, Guest Networks and no Smart Connect.
So Im wondering is whatever xfinity did is causing these problems and although I dont NEED IPV6 at this moment, what do i need to do else, to enable IPV6 and resolve this.
What process within the router runs every 20 mins? No scripts installed.
Any thoughts would be appreciated.. and yes.. I did look back though the forum for similar issues but nothing seemed to match my circimstances , or I just missed it.
Cheers..
 
What lease period does your ISP use?
(main page, click the wan button)
 
What lease period does your ISP use?
(main page, click the wan button)
DHCP Query frequency is set to Aggressive , I use Cloudflare for the DNS (DOT)
 
DHCP Query frequency is set to Aggressive , I use Cloudflare for the DNS (DOT)
That wasn't the question being asked. What is the lease time being issued by your ISP? Click on the WAN/Internet "globe" button on the Network Map page.
 

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