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ATT MODEM KEEPS RESTARTING INTERMITTENTLY

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ATT MODEM KEEPS RESTARTING INTERMITTENTLY

I have been dealing with an issue since May or June of this year where my modem intermittently restarts. Several technicians have come out, who found various issues at different times, like bad errors on the line, wires on the outside box crumbling, bad signals to the main box, etc. They changed the modem, location of the modem, wiring, internal parts in the outside box, ensured the voltage was good, etc. to no avail.

A technician came last Sunday to fix the issue yet again. A few hours after he left, the modem restarted again. It restarted a couple times the next few days then yesterday (Friday) when it restarted in the morning, I'd had enough. I called ATT again and while talking to the agent, the modem rebooted itself. A technician came out within two hours (have to say, their dispatch was quick) checked everything and mentioned there were bad errors on the line. He did something at the main box, performed various checks and contacted other senior techs, but he was stumped.
When he left about 30 minutes afterward, the modem restarted again. I called him directly (at his request if this happened again) and he asked that we unplug the unit from the wall and plug it into our power cord. This worked until today (the next day) when the modem restarted again. There were no TVs on, no one was on the telephone, I was only using the Internet.

I really like ATT's programming and the bargain I negotiated with them last year. I have the U450 plan with 18mbps. I have had issues with their internet service since day one (four or so years ago) that technician after technician has tried to repair. I was finally was told a year or so ago that my house was at the end of the line. That is why I experience the slow internet speeds at times (like 1-2 Mbps). They ended up putting a couple wifi receivers in and hard connected my main laptop that I use for work, that finally somewhat stabilized the speed (at least it's not almost every week we receive the slow speed).

Anyone have an idea why the modem keeps restarting at various times?

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Message 1 of 17
ACE - Guru
Solution
Accepted by topic author
Accepted by showmestate
‎10-05-2015 6:56 AM

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

When all esle fails try turning off IpV6.

I dont know what RG you have but on the NVG589

 

While connected to the RG via wifi or directly.

Enter 192.168.1.254 in your browser.

A menu will come up.

Goto Home Network and then configure.

You will see the IPv6 option there.

Set it to off and save.

Award for Community Excellence 2019 Achiever*
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
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Message 2 of 17

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

Thank you very much!   The technician came yesterday and switched out two things. One is the power strip, replacing it with an ISOBAR.  The other was something else that he changed from 36 to 30. He said those were known to back feed.  

So far so good.  I checked the IPv6 setting and it is set to "ON".  

If this happens again, I will change it to off and see if that works.

 

 

By the way, what does the IPv6 setting actually do?   By switching it off, will that cause other issues?

Message 3 of 17
ACE - Expert

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

The IPv6 switch allows the Gateway to create a IPv6 over IPv4 tunnel so that IPv6 addressed traffic can come and go from your network to the Internet.  At this point there are extremely few (if any) sites that can only be reached via IPv6, so IPv4 is fine.

 

IPv6 is a new addressing scheme that was created in the 1990's when the Internet started running out of addresses in the scheme being used (IPv4).  The invention and widespread implementation of NAT has allowed for a long delay of the transition to IPv6.

 

In a few years, you probably could not turn IPv6 off safely.  Now, there's no problem at all doing so.

 

The reason we suggest you do so now is (1) Some Gateways have firmware bugs that cause them to crash processing IPv6 traffic, (2) the IPv6 to IPv4 tunnel causes some packet size issues resulting in a lot of lost packets and retries and is therefore not all that useable in its current form, and (3) a lot of IPv6 hosts are experimental in nature and not really ready for primetime either.

 

 

Award for Community Excellence 2019 Achiever*
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 4 of 17

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

Thank you!

Message 5 of 17
Contributor

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

Where would one turn it off on the 3801HGV?

Message 6 of 17
ACE - Expert

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY


@GregTR wrote:

Where would one turn it off on the 3801HGV?


http://192.168.1.254/xslt?PAGE=C_2_6

 

(Or http://192.168.1.254 > Settings > LAN > IPv6)

 

Uncheck IPv6 LAN Enabled.  Click Save.  Enter the System Password from the side of the Gateway.

 

 

 

Award for Community Excellence 2019 Achiever*
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 7 of 17
Contributor

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

My Modem Details:

 

Manufacturer : Pace Plc
Model : 5268AC
Hardware Version: 260-2173300
Software Version: 10.5.3.527157-att
 

I have been facing the same issues as showmestate.  Multiple technicians; most recent one said your connection is very good after running some tests.  He said there was a little distortion, but negligible.  

 

In my case, I am not far from the ATT receiver (located just about 1000 feet).  The Wordpress JetPack monitors (via blogs hosted on multiple virtual servers) report a 3 minute lapse intermittantly, sometimes twice a day.  

 

But, since I run hosting/email servers with my business connection (with public IPs), I do not want to disable IPV6. I am using IPV6 for a few virtual servers on multiple server machines.  

 

I thought IPV6 was OK?

 

What should I do?

Message 8 of 17
ACE - Guru

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

You could try changing to Google's DNS settings.

 

The Google Public DNS IP addresses (IPv4) are as follows:

  • 8.8.8.8
  • 8.8.4.4

The Google Public DNS IPv6 addresses are as follows:

  • 2001:4860:4860::8888
  • 2001:4860:4860::8844

You cant  make these changes on the RG. You will have to make them on each device that connects to the RG.

 

Award for Community Excellence 2019 Achiever*
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 9 of 17
Contributor

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

You mean to replace the ATT given DNS servers with these on a given machine?

Message 10 of 17
Expert

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY


@hostlawn wrote:

You mean to replace the ATT given DNS servers with these on a given machine?


This might help you understand better:

 

https://developers.google.com/speed/public-dns/docs/using

 

Step by step instructions. Smiley Wink

 

Chris
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Message 11 of 17
Contributor

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

I have the same promble where do you find all this. to fix or do I have to get a tech to do it

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Solved

When all esle fails try turning off IpV6.

I dont know what RG you have but on the NVG589

 

While connected to the RG via wifi or directly.

Enter 192.168.1.254 in your browser.

A menu will come up.

Goto Home Network and then configure.

You will see the IPv6 option there.

Set it to off and save.

Message 12 of 17
Voyager

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

Is this 'solution' (turn off IpV6) for Uverse customers only, or does it also apply to DSL?  We have continuously had connectivity issues, for at least 2 years now. We are a small business and must have static IP's, and 90% or more of our business is utilized through the internet. Same as many, we have switched routers ( I have 3 in our storage closet already), been told errors in line, at D-link, mice chewed a line at box, etc etc etc.  I have an entire folder on service requests and each time, it appears that a knowledgable Tech comes out and things work, at best, very temporarily.  I have even installed a program that monitors our drops and saves a log, which is quite informative.  I have given up calling Tech Support, as they run me thru the same old stuff, and end up telling me some latency and drops are to be expected.  Being a small company, the IT stuff falls on my lap, which needless to say, ,is not my forte.  IF turing off the IpV6 will also help us old school DSL users, I absolutely will give it a shot, but I have previously asked Tech Support about that AND turning off our wireless, and was told it makes no difference.  (btw, we currently use DSL gateway  netgear 7550.)

Any help/advice would be so greatly appreciated! As much as I would hate to switch everything to another ISP, I have already been in the works making sure we can be compatible with another provider.  Thanks!!! MC1387

Message 13 of 17

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

Is this still a valid suggestion in Jan of 2017?   If the IPv6 content is so infrequent, why would it be to blame for frequent WiFi failure?  It would be nice to see a list of what DOES cause the WiFi to reset - that would provide us with a place to start.

Message 14 of 17
ACE - Guru

Re: ATT MODEM KEEPS RESTARTING INTERMITTENTLY

The IPv6 issue causes the gateway to restart which would bring everything down, TV, Wifi etc. etc. until the gateway restarts.

If it's only your wifi that is a problem then it wont be due to the IPv6 bug.

You have responded to an old thread on the IPv6 issue.

Best would be to start a new one exactly outlining your problem and then we can see if we can help. 

Award for Community Excellence 2019 Achiever*
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 15 of 17
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