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My 2wire modem/wifi keeps resetting

hav
Contributor

My 2wire modem/wifi keeps resetting

we noticed this a while back. never really cared for it, but now its getting annoying since i just bought a new modem thinking that there was something wrong with the old one. i dont know exactly whats going on.....it works fine for about 30 minutes then it just resets. streaming movies, playing online games and even browsing the internet have become a hassle....pls help!

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Message 1 of 109
Expert

Re: My 2wire modem/wifi keeps resetting

You should also contact David here.

 

 

 

Message 16 of 109
Employee

Re: My 2wire modem/wifi keeps resetting

When the wireless fails does the log show any errors like "err_dma" ? 

 

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 17 of 109

Re: My 2wire modem/wifi keeps resetting

Where is the log your talking about? The only thing that resembles a log is the broadband link statistics page with its list of accumulated errors over a period of 24 hours. (but its not a text list, its more like headcount of the errors ect. -none of which look like the one your asking about)

I just reproduced the same crash that I've been able to almost (more on that in a moment) consistently reproduce in the same way for days now and nothing like err_dma shows, probably because I don't even know where I'm supposed to be looking for it. However, the crash completely reset the broadband link statistics page, so any insight that might have from over the last 17+ hours is now gone.

Also want to mention again that when the wireless fails, the whole modem goes dead, then comes back up with ONLY the wireless light on. I have zero access to the modem during that time. Just a few moments ago when I reproduced the crash to see if I can find what you were talking about, I had to -like I've also mentioned before- go on and shut down the xbox before the modem would even cycle correctly and allow me back into the modems interface.

Reason I said "almost" in 2 paragraphs ago is because last night, after I posted that last bit above about my time on the phone with the rep, I went into the living room and turned on the xbox to at least play something offline and unwind a little, and the connection --for whatever miraculous reason-- stayed connected and didn't fall flat on its face. So between 10pm to 1am I couldn't do anything but crash, while From 1am to 5:30am, the modem didn't crash and I get disconnected from Xbox Live due to a low signal (or any other reason I could be d/c'd).

 

I also just got finished running another test where I turned off every internet using item in the house (xbox, all 3DS', DS' and computers) and then turned on ONLY my 3DS. While it was connected to the modem alone, the modem didn't crash. When I turned on my roommates 3DS, in addition to mine still being on, the modem crashed immediately. Apparently, whatever is causing the crash can't handle the draw from multiple wi-fi devices, nor can it handle the draw from a single wi-fi device when a wired computer is also running (like the first reproduction I did tonight).

 

This seems pretty congruent with most stuff I found today while digging into this. While looking around for answers I found a treasure trove of information in the exact last place I'd ever think to look for it: The bestbuy.com customer reviews for this exact same gateway modem -an item Best Buy sells over their website. I want to say a good 90% of the reviews all recount pretty much the same issue myself and -at least- Cakewzd have brought the the attention of this forum: Went to go connect to our favorite wi-fi devices and had the modem crash, rinse and repeat. And some went as far as to say they did what I did:  called AT&T, were told they couldn't be helped and were pressured into immediately spending $100 to replace this proprietary modem before ever exploring other avenues.

 

Many of them claim the problem is the modem's powersupply, that the supply just fails. Most of those same people say that there's a replacement cord (or something of the sort) that they were only able to find through AT&T (go figure) that helped the issue. Some even said they had to go so far as to get the cord and replace a resistor within the modem -and even that seems to be only a temporary fix.

 

Some of the people reviewing the modem had actually gone through multiple replacements before altogether giving up on AT&T and its shoddy hardware. Some having to pay in full for new modems even though they were still under warranty -as AT&T wouldn't honor it, and one guy telling a story where HE had to pay out of pocket for the technician to come to his house to check out the situation before anyone ever figured out it was the modem's powersupply. And the consensus from most of the people who have seen these issues with the modem is that  AT&T knows these gateways are sub-par and can't handle much more then a year of use, gave it its warranty according to that, and that the reps know this, yet don't tell the customers the problem -stringing them along till they feel like they have no choice but to spend $100 on the replacement.

 

So, I'm still completely willing to work with you on figuring this out, but I've become pretty positive that its the modem's powersupply and not something within the setting, or suddenly something having to do with the devices trying to connect to it.

 

 

I'd love to hear otherwise, however. So lets please continue troubleshooting for the time being.

Message 18 of 109
Employee

Re: My 2wire modem/wifi keeps resetting

Here you go. Some more stuff to try. 

 

 

Try this one or confirm if this is on the DSL diagnostics page first... you will want to have the 2wire's interface (dsl diagnostics up when you turn on your friends DS) if this is what's causing it, you should see it briefly before the 2wire dies. You could also just go in and change it to WPA or WPA2 and power his DS on and if it stays up, then you may have nailed the problem down at that point. 

 

Err_DMA  fix:

As far as err_dma, from reference I got it had something to do with on the dsl diagnostics page.  Under the "Exit code" 

 

http://www.dslreports.com/r0/download/1675143~63d3160610e6da5c0978788df8371698/080411.png

 

What seemed to fix it was the following... 

 

Point  is do not use dual WPA/WPA2 authentication mode (also known on the 2wire as "WPA-PSK and WPA2-PSK") on 2WIRE 2701HG-B. Leave it at WPA2 or WPA, or (God-forbid) WEP, only. 

 

 

 

This one could help as well, maybe you are interfering or the modem is interfering with another more powerful wireless signal. Now if there is no one nearby or you are out in the middle of nowhere, this can be probably the least of the solutions to try. This one typically would be more popular if you are in a city setting or in an apartment complex. 

 

Try a different wireless channel-

I had one guy that was having this similar problem and he had 35 devices  all on channel 6. He changed to a different channel and that seemed to alleviate his issue with the 2wire.

 

This is what he used to find a "Quiet" channel, and told the 2wire to go to that channel. There is only 13 channels in the united states.I think he found no one in his immediate area on "channel 9" so he took that one. Said his wireless cleared right up. 

http://www.metageek.net/products/inssider/

 

or 

 

 

 

This one might be a good idea none the less based on just the sheer number of devices talking on 192.168.x.x these days. I would do this one just to simply and solve some wired and or wireless network problems. You might be quite surprised how well this one works. If you have any devices arping your 2wire to death, via wireless, this might come to an end. 

 

Changing the base IP address: 

I solved another one just by changing the base IP address from 192.168.x.x to 172.16.x.x.  This one seems to solve quite a bit of wired and or wireless problems. Since about 99.9999% of devices made today talk on 192.168.x.x flavors there might be confusion as to which local network to listen to. THis change would alleviate this problem. As more win7 and macs remember what IP address they had under their connection settings, this can resolve those problems. 

 

To change the 2wire IP address range follow these instructions below


  1. While connected to your wireless network, go to http://gateway.2wire.net/ or http://192.168.1.254, http://192.168.1.1, or http://172.16.0.1 .  You’ll have to enter a password or two.
  2. The 2wire main page should come up
  3. Go to the “Home Network” tab, click “advanced settings
  4. Go to “private network”
  5. Click 172.16.0.0
  6. Click Save
  7. Reboot the 2wire and any desktops, laptops, phones, game consoles, etc. as these devices just became disconnected and will have to be issued new addresses as they come online from the 2wire. 

 

 

This one may alleviate some issues with game consoles, and macintosh systems. 

 

 

Disabling Packet flood and enabling strict udp session control.

 

Note: this may also resolve some connectivity issues with Macs that may have a problem keeping a connection. This may resolve some gaming console issues.

 

  1. While connected to your wireless network, go to http://gateway.2wire.net/ or http://192.168.1.254, http://192.168.1.1, or http://172.16.0.1 .  You’ll have to enter a password or two.
  2. Go to “Firewall” and select “advanced Settings”
  3. Check the following checkboxes/radio button dials
    1. “Strict UDP session control (check if unchecked)
    2. Uncheck “Packet Flood (SYN/UDP/ICMP/Other)”
  4. Click “Save”
  5. Reboot the 2wire unit and reconnect

 

 

 

Truthfully if it is a power supply problem, it should  be present whether wired or wireless. Not just wireless and not when you turn on a specific device. Otherwise the first device you turned on via wireless should have failed too. 

 

 

 

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 19 of 109
Contributor

Re: My 2wire modem/wifi keeps resetting

I am having this same problem which began late last week AFTER having residntial phone service reestablished back at my house. We have had only DSL for over a year and no problems. When I had a local phone line reconnected last week, it started kicking me off every time I  connected wirelessly with my Gateway Laptop. AT&T tech support has been no help on this for the past two days. I am review the latter posts of this thread and hoping some of your suggestions will help.

Message 20 of 109
Employee

Re: My 2wire modem/wifi keeps resetting


bmi1965 wrote:

I am having this same problem which began late last week AFTER having residntial phone service reestablished back at my house. We have had only DSL for over a year and no problems. When I had a local phone line reconnected last week, it started kicking me off every time I  connected wirelessly with my Gateway Laptop. 


 

I would make sure you are not losing sync, from what it sounds like, it sounds as if it's a dsl sync drop problem. DId you put the filters back on the line? 

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 21 of 109
Teacher

Re: My 2wire modem/wifi keeps resetting

I too, am having ERR_DMA issues resetting my DSL connection several times per day.  AT&T has been here and claims nothing is wrong.  I have been searching for a solution when I finally stubled on this thread.  David, your replys have been the most understanding and helpful yet.  Thank you.  But I still have the problem.  I am running WEP.  Channel 11, it was channel 1.  I am in a rural area no other wifi networks within reach.  I have two dell laptops, one macbook, ipad, ipod.  I do not have any correlation between devices and the problem. (But I'll work on that, its a little difficult with 4 users)  It seems from your posts, there are many possibilities to a solution.  This basically tells me we do not understand the root cause of the problem.  (I have a case into 2wire, but havent got a response).  So my question is, is there another AT&T router/modem besides a 2wire that does not have these issues (or other damming issues)?  For me, I would just prefer to replace my 2wire with another manufacturer router/modem and be done with it.  BTW, if so, why wouldn't AT&T be suggesting replacing the router/modem?  There is an aweful lot of service going on over this problem by AT&T.

Message 22 of 109
Teacher

Re: My 2wire modem/wifi keeps resetting


INF 2011-11-05T04:14:10-08:00 sys: dsl0: connection lost, reconnecting...
INF2011-11-05T07:18:09-08:00 sys: dsl0: connection lost, reconnecting...INF 2011-11-05T07:42:41-08:00 sys: dsl0: connection lost, reconnecting...
INF 2011-11-05T07:46:33-08:00 sys: dsl0: connection lost, reconnecting...

NOTE: this occurred last night at 4:14 AM, these all correlate to ERR_DMA in the training statistics & CRC errors.

Is there a way to dump the log to a file and sort on time? This log is grouped up weird.

 

Edit update:  The Macbook was powered off last night, out of battery.  The ipad was powered off.  This leaves the 2 dells (one vista, one win 7), ipod and oh yes hp printer 7200 on my wireless network.

 

BTW: daylight savings kicked on my 2701 today!  One day early....  Its getting time from NTP @ 2wire and adjusting for daylight savings automagically...:-) time zone is correct.  Or maybe I slept through today and its really tomorrow...

 

Message 23 of 109

Re: My 2wire modem/wifi keeps resetting

I'll try the stuff provided but only for the sake of others who may have the issue. I've gone ahead and began the process of getting service elsewhere, and will be canceling my AT&T account this week. After all the things over the years I can't bring myself to understand why I've stuck with this service for so long after having so many ill handled problems, let alone pay far to much for the uncompetative speeds provided to my area, when I keep being forced to use less and less of the service I'm hardly getting. This whole modem ordeal is just the straw that broke the camels back.

 

"Truthfully if it is a power supply problem, it should  be present whether wired or wireless. Not just wireless and not when you turn on a specific device. Otherwise the first device you turned on via wireless should have failed too. "

 

I can see where it's reasonable to believe that, but in thinking about the issue over the last few nights and I've had computers in the past with power supply issues that acted the same way. Computers that would turn on fine and work great until power consumption changed due to trying to play a game or photoshopping things for school, only to have them crash. So its not unreasonable to think that the modem would be just fine with the wired connections if the wi-fi isn't being used, the wired connections aren't drawing nearly as much power. And if the issue is somewhere between the supply and wireless connection itself, then theres a pretty good chance the wired connection wouldn't be effected outside of the complete loss of connection caused by the wireless crashing the modem.

 

Look at it this way: These gateways are like those TV's with a VCR or DVD player built in. The player goes and the TV could still work for years. Sure, the TV could take a nose dive but theres also a pretty good chance nothing will happen. However, for whatever reason you bought that unit, you probably bought it with the express intent to use that built in player -so having a half working device is going to start to feel like a waste of space, and a pretty big inconvience when you can't use it for what you've intended to use it for.

 

You can also look at it like this: The wi-fi is, for whatever reason, suddenly drawing so much power that the modem is making an emergency shut down. If the thing is designed to combat overloads that would lead to potential fires, then any overdraw in power it deems to be too much is going to hit the killswitch, even if its for a second.

 

Also, like I said, its not just 1 specific device, its 3 seperate devices causing the crash whenever they're on, and its usually in conjunction with it being on along side one of the 3 wired computers in our house . I even went as far as to buy a used DSi (which I'm going to be able to return) to test the issue, to make sure that its not an inside job, and it crashed the modem -and a DSi is FAR from being a wi-fi juggernaught.

 

I also want to pose this question: If it isn't something hardware related, then why would this happen with 3 different devices so suddenly?

 

Theres been no updates for the modem's firmware (and there aren't any now), nor has there been any updates with the devices to make their connection to the wi-fi different. Theres been no change on our end PERIOD, before the issue popped up and we have been using the wi-fi consistantly for over a year. I don't see how it could be a settings/software issue, and I'd like to know how it could be, just so I can understand it for later reference.

 

Any way, before I go try any of this, I have to say I probably won't be able to try the thing mentioned to help the console. In looking for thing that might allieviate the problems I went into my 360's settings, which somehow resulted in deleting the profile of my modem. Now, the Xbox doesn't even see that the modem exists in the world.

 

The only way I know of to make it see the modem so I can go throught he process of setting up the profile again is to have a device on that keeps the wi-fi connections open -and I think you can see the obvious problem with that: If I try to have more then 1 wi-fi device on at any time, the modem's going to crash and I'll need to turn off the xbox and the other device in order to allow the modem to cycle and restart properly, losing every chance I had at getting anywhere in the process.. And since I can't seem to find a way within the modem to turn the wi-fi to a setting where its always on, I'm not sure how i'm going to get around that.

Message 24 of 109
Teacher

Re: My 2wire modem/wifi keeps resetting

For those following this thread... check out http://forums.att.com/t5/Routers-and-Home-Networks/AT-amp-T-2Wire-2701HG-B-Disconnects-Drops/td-p/27... It provides more information and some solutions, including a better modem by Motorola. Could be worth a read.
Message 25 of 109

Re: My 2wire modem/wifi keeps resetting

@desmolift

Either that link is wrong or that threads been closed

 

@David

 

Tried changing the channel (theres only 11 on this modem by the way) but it didn't help, none of the devices would connect to the wi-fi at all after the change and reboots. It was as if the devices didn't know the modem existed (this goes for the 3DS' and the test DSi I bought, I still can't connect long enough to see and set up the modem over the 360 -see my last post for those details), tried to see if something in their settings could be changed to see a different channel but I couldn't find anything that looked like it.

 

As for those links to the programs that I could use to see how many devices are on the connection, I either couldn't figure out how to use them properly, or they just couldn't find my wi-fi connection period -probably because the connection is closed without a device starting it up, which just crashes the modem any way and completely defeats the point.  All either of them really said were "no wireless adapter found", which I assume is because the connection isn't on all the time, and since I don't have a clue how to properly use these programs, because I'm obviously not an expert in these sort of things, I don't know really what good it is telling me to use them at all.

 

All in all though, if MAC addresess are any indication, and I'm assuming they might not be, the only devices that ever connect to my modem are the ones in my house. I'm guessing however that I'd be told that it doesn't matter and other devices could piggyback onto the signal/channel without connecting to my modem, so I don't know if I've already answered my own question with that or not.

 

As for changing IP addresses, I had a difficult time following your steps to change the base IP, since I can't connect to the wi-fi without the modem crashing.. Since the issue is getting worse and the modem won't accept ANYTHING at all connected to the wi-fi connection without a crash (a developement that arose AFTER my post the other night, when I started to try these things), let alone while a wired computer is on with a wi-fi device (like I think I've mentioned), I really couldn't do step 1 exactly like you wanted.

 

I did try changing the base IP just through one of the wired computers with no wi-fi connection on (because I can't figure out how to turn it on without a device doing it for me) but again the devices acted like they had no clue the modem was even there. Actually, in this case the modem stopped the wired computers from connecting to the internet completely (didn't crash, just wouldn't find anything).

 

All in all, all we can do now is only use the wired connections. Its gotten to the point where we can't connect anything to the wi-fi even for a short time without the modem resetting, and its greatly limiting the use we usually get from the internet. In fact, the wired connection seems to be much faster now that the wi-fi really can't seem to be used at all... So, not really sure what you want to make of that.

 

Message 26 of 109
Teacher

Re: My 2wire modem/wifi keeps resetting

I think the link is busted, cut and paste doesnt seem to work.  Go to support/communities and search for ERR_DMA in the search box, that will get you to three threads of interest. http://forums.att.com/

 

Message 27 of 109
Teacher

Re: My 2wire modem/wifi keeps resetting

@BoomingEchoes

Have you checked your modems Statistics? If not got to, http://gateway.2wire.net/management, enter your system password and click on DSL Diagnostics. There is a table of data there, check the column Exit Code for ERR_DMA. If you can screen shot it and post it.
Message 28 of 109
Employee

Re: My 2wire modem/wifi keeps resetting

Supposedly from what little I know of the error/exit code of "ERR_DMA" is suppoedly it had something to do with the 2wire potentially being in the "wpa-psk and wpa2-psk" However I had another chat with another peer of mine tonight, Someone mentioned also going in and turning off the packet flood inside the 2wire. Now one thing I had a notion of trying with a spare 2wire I have is unchecking all the packet detections the 2wire does on the firewall and see if that makes a difference.  Most (not neccsarily all) don't normally check for these things (least my linky/dd-wrt never did). That might be a key as well. 

 

Another thing is also try changing it to WEP and just 802.11b- from some people I have heard from that seems to clear up some wireless issues as well. 

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 29 of 109
Employee

Re: My 2wire modem/wifi keeps resetting

Edit to add:

 

I have another 2wire at the house here, I have done some things to it that may either fix or potentially help with the wireless drop problems. If it does I should know more within the next day or so.

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 30 of 109
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