modem randomly reboots driving me MAD

modem randomly reboots driving me MAD

modem randomly reboots driving me MAD

I'm Helpful Level 1

modem randomly reboots driving me MAD

I signed up for Fido internet near the beginning of this month and oh my god it's been nothing but craziness.

The cable modem (Hitron CGN3AMF), just randomly reboots itself doesn't matter if it's in Gateway mode or Bridge mode.


At first it was kinda okay for about 2 weeks in Gateway mode, ( I use my router behind it), then the problems started to appear nonstop.


a little timeline of events:


prior to the 17th of Oct, modem was in Gateway mode in front of a router. Netgear WNR2000v2, but since then been replaced by another better router TP-LINK Archer C8 v2 AC1750. Modem was restarted(unplugged) almost every 2-3 days.


2016-10-17 10:14 modem was in Bridge mode, rebooted for no reason, no "machine name" (reverse DNS) found which I found strange since this is a standard practise for all ISPs to track users with rDNS

2016-10-22 23:57 random reboot

2016-10-23 23:18 random reboot

2016-10-24 13:10 reboot
                      13:19 reboot
                      13:41 reboot

                      are you kidding me now. 3 reboots within 1 hour????!??

2016-10-25 13:33 unplugged everything, replaced power cord with a better one with surge protection, EMI/RFI noise filtering and anti-static protection etc. just trying to provide it with good clean power, same IP as before but this time a rDNS was found

2016-10-26 10:14 reboot
                      10:39 reboot
                      12:39 reboot
                      13:14 reboot, ARE YOU KIDDING ME AGAIN. guess my new power bar didn't help.
                      13:20 unplugged everything to restart, running till now so far working ok as time of posting 2016-10-26 19:06


I do not want to restart the freaking modem every day for it to work properly, I shouldn't have to anyway. Before I changed to Fido I had Rogers internet, and it had the same problem with their Cisco DPC3825 modem, although the frequency of it happening was not this high. Yes I know Fido IS Rogers and is using the same cable line, so I think it's probably a problem somewhere on the line itself instead of my home. And yes I have exchanged modem before with Rogers but it did NOT help so I highly doubt changing modem with Fido will do anything.


**Edited to add label


Accepted Solution

Re: modem randomly reboots driving me MAD

Solved by I'm Helpful Level 1

ok for those who might have the same problem and stumble onto this thread, here's a TLDR version on how to solve it if you had ruled out cabling problems, node problems, etc etc.



long story:

A second tech, Sean, came out on Oct 31, who was even more thorough than the first. He checked every cable, every junction, climbed up to the pole in front of my house, checked the node I'm on, checked the modem, checked the new modem that he brought, replaced some cable heads, bascially everything there is to check. Big thanks to Sean! 11/10 Smiley

When he left it was working fine and worked for a few hours before the reboots started again. arggghh

At this point I was quite confused because there really is nothing else to check as Sean checked everything.


Well then, I called into tech support yesterday Nov 1st while the modem was rebooting on its own, hoping to show support that it was still doing it. But unfortunately the phone's self-serve menu and the transfer from 1st tier to 2nd tier support was too long, the modem finished rebooting already when the tech logged into it. I told him to check its logs and he did, and confirmed the reboots.


Then he told me the following

Currently we are aware there is an issue with the firmware on Hitron modems causing it to loose signal and reboot when it's in bridge mode while there is another router connected to it.

There is a new firmware version being tested that will fix this issue and going to be rolled out soon but unfortunately at this time we do not have an ETA on when that will happen.


So I guess this is an official acknowledgment there is something wrong with the modem. And the only way to solve this currently, is to put the modem into Gateway mode and never in Bridge mode. I did put it in gateway and now double-natting with my own router, and so far it's been working ok. Hopefully it won't reboot on its own again fingers crossed though.


And this firmware from Fido's parent company Rogers is probably the new one

I wonder when we'll get it since that thread is a few months old already.

View solution in context
I'm a Participant Level 2

Hello friends,


my internet modem keep restarting itself, causing me to lose internet non stop throughout the day. It seems to be random, sometimes it will continue to restart over and over othertimes it will be maybe once every 10 minutes or so.


This has been going on for a month now and seems to be getting worse and worse.


Any suggestions?

Former Moderator

Hey @Kappa1


Moved your post here since this seems to deal with the same issue. Let us know if that helps! Smiley 

I'm a Participant Level 2

Could someone please tell me the steps to put the modem in gateway mode? That would be very much appreciated
I'm a Participant Level 2

My modem is in gateway mode I assume?




Former Moderator

Hey @Kappa1


Can you try these steps: 


1. Check if the modem power plug is connected to a power bar. If it is try connecting the modem directly to a wall socket for a few days and see if this changes anything.

2. Putting the modem into Gateway mode or Enabling the Residential Gateway Function will turn back on the wireless portion of our device, meaning you wont need to use your own router. This is how we recommend all customer use our service, with the built in router of our device. 

3. You can also disable the UPNP capability in your modem. 
    -  UPNP is for the automatic discovery of other Plug n Play devices on the network. If you don't use file sharing between local network computers, or shared printers on the network then its unlikely you will need it enabled.

4. Are you using any new hardware since the issues started.  Some new devices could cause the modem to reboot when connected (such as a new laptop, wireless mouse, Google ChromeCast)? 

Can you you try all of this and let us know what happens? 


Thanks! Very_Happy 

I'm a Participant Level 2

Hi @FidoMegan


I've been having the issue with modem restarting since I got my new laptop back in May. The modem restarts whenever I connect this specific laptop to home wifi, otherwise it's pretty stable. After it restarts it stays while I am using the laptop by disconnect every once in a while. What should I do in this case? 

Former Moderator

Hey @Adam127


That shouldn't happen Sad


Have you contacted our tech support regarding this? They'll be able to diagnose the problem to see what's going on, and swap out the modem if necessary!


You can find the ways to reach them here.


Hope that helps Smiley 

I'm a Participant Level 1

Hello,  I've been having the same issue with a randomly and frequently resetting modem (several times an hour) for a couple months now.  I've already spoken to a helpful tech who diagnosed the problem initially and went through the possible fixes listed here (gateway mode, change location of modem and plug into another outlet directly, turn off upnp, etc).


The tech eventually advised to exchange the modem in store and made a note on my account.  I've since wasted several hours in store with numerous failed attempts to exchange.  The reps always have a system issue with processing the exchange and the people they phone for help are unable to either, and the opened tickets arent resolved or followed up on.


Can someone please contact me and arrange for a resolution.  

I'm a Participant Level 2

ive gone though the same. unbelievable. fido needs a class action lawsuit for selling a defective product.



Hi @cottonclub,


That's certainly not the experience we aim for nor the impression we want to leave you.


We'll be sending you a PM shortly to review your account. 



Messaging you right away @Harley12

I'm a Participant Level 2

I have the same problem, the modem keep randomly reboot, 

can I know how to resolve it?

Hi @cc96ai1 & welcome to the Community!


Have you tried any of the suggestions in this thread?

I'm a Participant Level 3

The only way I could fix that was setting up my notebook to G only.


Check this link and change you PC/Notebook to 02 - 11g


I hope it helps you.



I'm a Participant Level 2

Thank you for the reply @FidoNick.


Yes I called Fido tech support and they did analysis on their end  on the phone for almost an hour and concluded that the modem is OK and the problem is with the laptop and did not offer any other help!


When I use the laptop in other places (example at work or tethering on my phone) I don't see the issue. Also I tried connecting the same laptop to another Fido modem at my friend's house and the issue happened there as well.


I saw in @FidoMegan's reponse a mention of possibility of the issue arising from new hardware such as a new laptop, so I was hoping to get a hint from there. I appreciate any ideas.

Former Moderator

Thanks for clarifying @Adam127!


I've checked things out, and it seems the wi-fi card in your laptop, may be incompatible with the wireless adapter in our modem. This isn't a very common situation, but it does unfortunately happen with certain devices. 


To confirm this, can you try out the Ethernet cable to see if the same thing happens? It should work with the Ethernet cable!


I understand the cabled connection may not be ideal though, some alternatives are to use your own modem and putting ours in bridge mode, or getting an external wireless USB adaptor for your laptop.


I hope this helps out, keep us posted on any updates! 


Former Moderator

Welcome to the community @Fidopls!  Smiley


That definitely doesn't sound right. Since you mentioned it doesn't seem to be a modem issue. Did you had a chance to contact the tech support number that came with the number to troubleshoot the issue? We can send a request to have a technician come over to check if there's any issues with the lines. 

I'm Helpful Level 1

@FidoTerry wrote:

Welcome to the community @Fidopls!  Smiley


That definitely doesn't sound right. Since you mentioned it doesn't seem to be a modem issue. Did you had a chance to contact the tech support number that came with the number to troubleshoot the issue? We can send a request to have a technician come over to check if there's any issues with the lines. 

I'm sorry but what do you mean with "tech support number that came with the number"? Is there a specific support number printed on the modem or something? I don't see any... I haven't called tech support though.


I seem to get the following errors in the modem log when the it looses connection and reboots:

82000200 critical No Ranging Response received - T3 time-out;
82000700 critical Unicast Ranging Received Abort Response - initializing MAC;


But it's kinda hard to track down since in Bridge mode I'm unable to access the modem's web interface.


Signal levels are not that great I think but also not toooo bad.


Downstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID Signal noise ratio (dB)
1 663000000 256QAM -9.200 12 38.605
2 591000000 256QAM -8.400 1 38.605
3 597000000 256QAM -8.600 2 35.595
4 603000000 256QAM -8.700 3 35.084
5 609000000 256QAM -8.800 4 37.356
6 615000000 256QAM -8.600 5 38.605
7 621000000 256QAM -9.100 6 38.605
8 633000000 256QAM -9.700 7 38.605
9 639000000 256QAM -8.700 8 38.605
10 645000000 256QAM -9.700 9 38.605
11 651000000 256QAM -9.200 10 38.983
12 657000000 256QAM -9.500 11 38.605
13 669000000 256QAM -10.200 13 37.636
14 675000000 256QAM -8.800 14 38.983
15 681000000 256QAM -9.900 15 37.636
16 687000000 256QAM -8.600 16 38.605
17 693000000 256QAM -9.900 17 38.605
18 699000000 256QAM -8.500 18 38.605
19 705000000 256QAM -9.700 19 37.636
20 711000000 256QAM -8.900 20 38.605
Upstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Channel ID BandWidth
1 38596000 ATDMA - 64QAM 42.750 5 3200000
2 23700000 ATDMA - 64QAM 42.750 7 6400000
3 30596000 ATDMA - 64QAM 42.750 6 6400000


Googling the above errors I can see people say it's a line issue. So I think I do need a tech sent to check the lines.... can I do that online or do I have to call in? Thanks.

I'm Helpful Level 1

also I want to add that this morning (2016-10-27) the internet slowed to a crawl. The modem didn't reboot, but I couldn't open any webpage at all. Had to unplug everything yet again to regain connection. sigh~

Let's check out what's going on. 


I'll send you a PM shortly.