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20 posts

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#114762 2-Mar-2013 12:04
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Hi,

I've been having some issues with my connection dropping out for the last few weeks, it usually reconnects within a minute, but trying to find what the problem is.  Haven't had any problems like this before.

Setup - 
Central Splitter installed by ihug/vodafone several years ago.
Netgear N300 Wireless Dual Band ADSL2+ Modem Router - model DGND3300v2
1 computer running windows XP (ethernet connected)
1 computer running windows 8 (wifi connected)
1 samsung galaxy S2 (wifi)

I'm thinking the problem is outside the house, my best guess it is related to Chorus recently replacing our phone line as it was going through trees (on council land), they put a whole new lamppost and phone line in.
Connection speeds have been worse since the phone line was replaced, it used to consistently connect at around 20Mb Down, 1 Mb Up.  It still usually connects at around that but sometimes, especially right after its dropped out it will connect at something like 5Mb Down, 0.5Mb Up.
On speed tests we used to get about 8Mb/s sometimes up to 12Mb/s
Now we usually get around 5Mb/s but sometimes up to 8Mb/s

We also had Fibre installed on our street recently (Lees st, Dunedin).

The connection seems to be fine in off-peak times, drop-outs almost exclusively happening in the evenings during the week, and in the weekend.  For that reason I doubt it's my modem but am trying to find another one to test just to be sure.

In the router logs the disconnections were usually accompanied with a 'LCP Down' message
But just checking now (it only shows the last day) there is not one of those messages.

here is the log from this morning (It dropped out at around 10am for a couple of minutes):

Sat, 2013-03-02 09:01:50 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:08:16 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:18:39 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:28:30 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:38:17 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:48:14 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 09:58:21 - [UPnP set event:Teredo] from source 192.168.0.3
Sat, 2013-03-02 10:00:55 - UDP Packet - Source:98.137.1.70,3479 Destination:27.252.207.200,57333 - [DOS]
Sat, 2013-03-02 10:01:14 - Administrator login failure - IP:192.168.0.3
Sat, 2013-03-02 10:01:15 - Administrator admin login successful - IP:192.168.0.3
Sat, 2013-03-02 10:04:06 - DHCP server received REQUEST from D8:57:EF:22:27:A9
The only 'mention' of the dropouts in the logs seem to be the 'DHCP server received REQUEST' (I presume that's it reconnecting).  When it dropped out today I logged into the modem and it said 'Modem Status: Negotiating'  before going back to Connected after a couple of minutes.

There were a few dropouts last night as well:
Fri, 2013-03-01 22:28:19 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 22:37:11 - DHCP server received REQUEST from D8:57:EF:22:27:A9
Fri, 2013-03-01 22:37:23 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 22:38:42 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 22:48:32 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 22:58:35 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:08:14 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:18:44 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:28:30 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:38:21 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:43:50 - DHCP server received REQUEST from D8:57:EF:22:27:A9
Fri, 2013-03-01 23:44:05 - [UPnP set event:Teredo] from source 192.168.0.3
Fri, 2013-03-01 23:47:40 - DHCP server received REQUEST from D8:57:EF:22:27:A9
Fri, 2013-03-01 23:48:07 - [UPnP set event:Teredo] from source 192.168.0.3

Does anyone know what the '[UPnP set event:Teredo]' messages are that seem to be happening every 10 minutes? They are coming from the windows 8 machine, and I know they have something to do with IPv6, but  could they be causing a problem?

Windows 8 was installed recently, is there something about that that could be causing the problem ?

I talked to Vodafone support, that couldn't really offer much help other than saying try a different modem, and we can send out a chorus tech, but if its your fault it'll be $140...

So basically just trying to make sure its not a problem inside the house, so posting here hoping for some suggestions/advice

If you read all that, I thank you :)








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Uber Geek

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  #773622 2-Mar-2013 13:20
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What are your ADSL sync stats? Are these varying at all?





20 posts

Geek


  #773631 2-Mar-2013 14:35
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Do you mean this ? : 



The Line Attenuation has not moved.
The Noise Margin is jumping around constantly, download is going all over the place from 6db-14db, upload between 9db and 15db.


On another note am getting good download speeds right now... Tested on the desktop (ethernet) at 13.5Mb ... but only 8Mb on the laptop (wireless).... so I turned off the 5ghz band on the modem, (its dual band) and now getting 16Mb through wifi....



But I have still had one drop out, where the modem status switches to 'negotiating' since this.
I did just spot a chorus tech across the road working on the cabinet (I think it's a cabinet ? - big green box :P)  there (they seem to be there every other day of late) and asked him about the problem, he said it's probably the new line and to call Vodafone and they will order a line test.



 
 
 
 




20 posts

Geek


  #773632 2-Mar-2013 14:43
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Ok those stats are getting worse now (I think these are worse? :P ) and connection speed dropped too, but didn't lose connection...


29035 posts

Uber Geek

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  #773639 2-Mar-2013 15:09
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Your ISP can run a line test in SPM to see a whole range of details that could well provide some insight into the cause.

The first thing to do is try a different modem. There are devices out there that don't cope well with low attenuation when you're literally right on top of the ISAM.

7614 posts

Uber Geek

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  #773640 2-Mar-2013 15:27
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You could also try a 3 or 6dB attenuator to try bring the modems AFE in to a stable range.

Cyril



20 posts

Geek


  #774941 5-Mar-2013 12:49
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Thanks for the help/suggestions,  vodafone are going to monitor the line the next 24 hours and see if that picks up anything.

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