topic Re: NTP sync fail randomly, need to reboot modem to resolve everytime in Internet

NTP sync fail randomly, need to reboot modem to resolve everytime

CyrusCarbon — Wed, 10 Dec 2025 21:46:49 GMT

I subscribed to Bell's 3.0G service for my home office, but I've encountered a serious issue with internet time synchronization that occurs randomly. This problem is particularly noticeable with my IoT devices. When they reboot, they are unable to synchronize with the NTP server. Each time this happens, I have to reboot the Bell modem, and once it's restarted, everything returns to normal.

I’ve tried rebooting the IoT devices individually, but that doesn’t resolve the issue; instead, their time settings revert to factory defaults. In my office, I have an IP camera, a TV/media box, a NAS, and various other IoT devices, wired and wireless as well. They are also appeared the NTP issues.

When the problem arises, I immediately perform NTP testing on my computer, wired connect to Bell modem (please see the attached screenshots).

I called Bell support, she said she is just a Level 1 support and unable to resolve my question, and she will suggested me subscribing a Bell Tech Expert to remote to my computer and they will resolve my issue 🤔.

What should i do?

Failed: Sync with time.google.com

Failed: Sync with time.windows.com

Failed: Sync with ca.pool.ntp.org

Every time, after the modem reboot, it will resume everything!!

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

Vanadiel — Wed, 10 Dec 2025 18:18:16 GMT

when it fails, does a tracer route also fail?

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

CyrusCarbon — Mon, 15 Dec 2025 03:33:11 GMT

I just got the problem again, traceroute doesn't work. When the traffic went out from the modem (edge.home), no response from the next hop.

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

CyrusCarbon — Mon, 15 Dec 2025 03:45:44 GMT

One more thing, when i go to speed test. I will get failure page

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

dks — Mon, 15 Dec 2025 11:51:56 GMT

Do you have a VPN in play?

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

CyrusCarbon — Mon, 15 Dec 2025 12:13:14 GMT

No VPN, direct internet. I also tried to use Ethernet to connect to the modem.

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

Vanadiel — Tue, 16 Dec 2025 16:25:47 GMT

Are you using the 10G network port on the hub?

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

CyrusCarbon — Tue, 16 Dec 2025 19:19:46 GMT

Yes, i used of the port and connected to the switch, 10G is one of the downstream port to another switch.

But for the testing, i am using my computer and plug to the dedicated port on modem to test it. I also tried to use Wifi to make testing but also failure.

Re: NTP sync fail randomly, need to reboot modem to resolve everytime

BellNick — Mon, 12 Jan 2026 17:19:51 GMT

Hi @CyrusCarbon
We wanted to check in to see if you're still experiencing this issue? If so, do you know how long it takes for the NTP to stop working before the router reboot?
Are you able to perform and share a packet capture of the modem while this is happening?
Looking forward to hearing back.