jge132's profile

Visitor

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3 Messages

Tuesday, February 11th, 2025

Intermittent DNS Resolution - MG8702

I'm using a personal Motorola MG8702 for my router and have been using it with no issues since December 2020. Suddenly the second week of January 2025, all my DHCP client devices stopped being able to access the internet. I've tracked it down to the fact that the MG8702 has stopped relaying DNS requests. It still routes packets OK. Pinging IP addresses worked fine, just names did not resolve.

To be clear, the MG8702 is acting as a DHCP server. I've tried it both ways, set to get the DNS servers from the WAN (Obtain from MSO) where it gets 75.75.75.75 and 75.75.76.76, which are the Xfinity DNS servers, and also static which is 1.1.1.2 and 1.0.0.2 which are Cloudflare DNS servers. I verified with that ALL of those DNS servers do respond correctly. However, the MG8702 stops passing those DNS server IP addresses to its DHCP clients. THE TEMPORARY FIX is to JUST get into the router and hit SAVE on the DNS Connection settings...even though I don't change a thing.  This works for a few hours until the "outage" happens again. So I'm now in a constant state of fear due to working from home and having to watch the DNS service until it fails to pass names to clients, log into the router, save, and then wait until if fails again.  Any solutions?  I'm coping two others that have had the same issue years ago. @user_a61075 @user_a17d3f Hoping one of them found a resolution.

Thanks so much for the help.

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Official Employee

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1.1K Messages

6 months ago

Good afternoon @jge132. While we understand wanting to get your issue resolved as quickly as possible, we need to remind you that sending unsolicited direct messages can result in you being banned from the Forums. For future reference, please wait until we ask you to send a message. We can continue in your private message. 

(edited)

Visitor

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3 Messages

My apologies.  I had no idea DMs were against the Forum Rules.

Visitor

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3 Messages

2 days ago

Hello, did you find a permanent fix for this? I'm about to buy a different modem since this same issue is happening all the time now and the only fix is running around and setting static DNS on each device which is not an option for us due to work related admin rights, etc. it used to be a great device.

Visitor

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3 Messages

Just saw this post. Sorry. I believe it can be tracked to a faulty Motorola MG8702. It first started with the DNS issues, but even after buying a Zyxel Router and turning the Motorola into a dumb cable modem in bridge mode, the Motorola stopped passing through the Xfinity public IP to the Zyxel. I have since retired the Motorola and have replaced it with an Arris S34 cable modem, which sits in front of the Zyxel SCR 50AXE and the rest of my Zyxel networking gear. Much luck with your resolution...

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