[machanch]

D-Link DSL-2640R router losing connection - low SNR (Greenford Exch. LWGRE)

I am experiencing intermittent internet disconnection with my DSL-2640R router.. Started about September with intermittent loss of internet connection. The ADSL sync is still up when I log into the router to check the status of the connections. The router also takes longer than before to display it's web pages.. sometimes up to 20-30 seconds.

I spoke to TT 2nd line support and they made some changes to the setup, and for a while the internet connection appeared to be holding up OK!. But from friday last it started again with the same problems (intermittent loss of the internet connection.. ADSL sync OK!). There has been time when both the ADSL Sync and Internet has been down. I would normally soft-reboot to router to re-establish the connection.

Today 07:05 came to use the PC and the internet led was off which is normal if no one is using the system. PC connection to Router OK.. showing connection up local IP address OK.. however the router internet status led failed to change.. logged into router 'Device Info shows no IP addresses.

I am currently using a borrowed Netgear DG834 (no wireless) to see if makes any difference.. The 1st thing I noticed with logging in to the router, is the web pages comes up much faster in my browser. I have configured the router and all connection is now up. I will leave it on the Netgear router until tonight or tommorrow to see how stable the connection is over that period.

With my previous ISP I used this Netgear Router and it always gave a stable connection. As both my son and daughter has laptops with wireless connection, it is convenient to use the new router(DSL2640R) as my main and only access to ADSL connection.


1.What exchange are you connected to? Greenford UB6
2.Is it near any outages or congested exchanges ? No
3.Do you have other telephone extensions ? wireless extens
4.Do you have an NTE5 master socket and if so have you tried connecting your modem directly to the test socket ? Yes
5.Are you having any other voice related problems such as noisy lines and ringtone / ringing issues ? No
6.What modem are you using ? DSL2640R
7.Are you using a telephone extension lead to connect your modem to the telephone socket ? No
8.What is your modem line attenuation down and up? 22db down 9.9db up
9.What is your modem SNR Margin down and up? 20.1db down 8.4db up
10.What is your operation (connection) mode ADSL2+
11.What is your bandwidth down and up? Is this the connection speed? 8128kbps down 927kbps up
12.Is your router indicating a Fast or Interleaved Data Path ? Dont know
13.What security software do you have installed ? AVG
14.What are your speed test results? 6948kbps down 804kbps up (dist. from Exch approx 1000m)
15.Are you experiencing the disconnections at any specific time ? No
16.What lights change on your modem when you get disconnected ? green internet led light
17.Which Operating System are you using on your PC / mac (and which version) XP/Linux
18. Which applications are you experiencing slow speeds with e.g browsing, Peer2Peer, Gaming, VPN, FTP etc. None only slow when loading router web pages.. Internet OK when connection.

[OCE_Debbie]

Hi machanch,

I have changed the profile to 12db, please can you monitor the connection to see how it compares.

Thanks

Debbie

[machanch]

Debbie,

Ok I will monitor this connection through until 20:00, using the current router Netgear DG834.. If that is ok then I will switch back to the original router DSL2640R..
So far the connection has been Ok.. Any drop link prior to this update is due to my intervention..

Here is my current connection stats..

[OCE_Debbie]

Hi machanch,

How have you found the connection since your last post?

Thanks

Debbie

[machanch]

Hi
The connection has been Ok for 19 hrs using the Netgear Router. I have checked the logs and there is no drop sync, ADSL link or errors during that time (note this router is wired only). The changes you made have improved the quality of the connect speed.. so that is a positive on this setup.

I have now reconnect the original DSL2640R router to see how the connection performs. I am updating this message via this connection. I also have the router's web page up, and it is very slow downloading those.. web pages from the internet once unto to the site is quickly responsive.

I have noticed that the Lan Stats for this router shows a high error count for wireless even though there are no wireless devices accessing currently.
Could this be due to the channel used for wireless access, or a router problem, a little help here would be appreciated to fix that problem..

On the original connection issue, I will monitor how it performs over the next 24 hours using the DSL2640R..


Cheers

Justin

[OCE_Debbie]

Hi machanch,

How have you found the connection since your last post?

Thanks

Debbie

[machanch]

Hi,
Sorry for responding so late..

Well I checked the DSL2640R router logs this morning and it shows loss of link about 05:00 am. I have a printout of that log. It may have dropped between my checking at 08:20 and the time shown in the log below. I have no way of checking an extended log.

Here is the System log checked 16:50

11/27/2009 14:13:13 Accept() fail
11/27/2009 14:55:23 ppp_ready: ch:8053a7a0, iface:804b5140
11/27/2009 14:55:23 Accept() fail
11/27/2009 14:55:23 Accept() fail
11/27/2009 15:50:30 Call drop because echo reply not received in time
11/27/2009 15:54:49 MPOA Link Down
11/27/2009 15:54:50 netMakeChannDial: err=-3001 rn_p=80524140
11/27/2009 15:55:51 Last errorlog repeat 156 Times
11/27/2009 15:55:51 MPOA Link Up
11/27/2009 15:55:53 ppp_ready: ch:8053a7a0, iface:804b5140
11/27/2009 15:55:53 Accept() fail
11/27/2009 15:55:53 Accept() fail

It shows the link failing again.. It does not mean much to me. Maybe someone can enlighten me here.. Could it be that keep alive is wrong and needs changing.

Router Device Info stats.

General
Time 11.27.2009, 16:48:27, Fri
Firmware Version : v1.10
Internet Status
ADSL Modulation : ADSL2 PLUS
Cable Status : ADSL Link Up
Virtual Circuit :
Connection Type : PPPoE/PPPoA
Network Status : Connected
Connection Up Time : 0:00:52:34
Downstream Line Rate :
Upstream Line Rate :

[machanch]

Link drop again see log below:

Date/Time Message
11/27/2009 15:55:51 Last errorlog repeat 156 Times
11/27/2009 15:55:51 MPOA Link Up
11/27/2009 15:55:53 ppp_ready: ch:8053a7a0, iface:804b5140
11/27/2009 15:55:53 Accept() fail
11/27/2009 15:55:53 Accept() fail
11/27/2009 17:44:00 Call drop because echo reply not received in time
11/27/2009 17:45:15 ppp_ready: ch:8053a7a0, iface:804b5140
11/27/2009 17:45:15 Accept() fail
11/27/2009 17:45:15 Accept() fail

Note: There was no activity between the time I posted the last update and me coming back to check it. The uptime shows 31 minutes

Adnum to this update:
System Log

Date/Time Message
11/27/2009 19:51:42 Accept() fail
11/27/2009 19:51:42 Accept() fail
11/27/2009 21:22:00 Call drop because echo reply not received in time
11/27/2009 21:22:14 ppp_ready: ch:8053a7a0, iface:804b5140
11/27/2009 21:22:14 Accept() fail
11/27/2009 21:22:14 Accept() fail

[OCE_Emma]

Hi machanch,

The number of drops seems to have reduced considerably. I've amended the profile to 24isnr15 to try to get rid of the last few drops. Could you continue to monitor please? Stats are now:

Downstream Rate 11195 kb/s
Upstream Rate 722 kb/s
Downstream SNR 14.8 dB

Cheers
Em x

[machanch]

Hi Em,

I had a drop of the link about 02:44 this morning. The link came back up and was up for approx 13.5 hours and suddenly dropped. I guess that was due to the changes you was making at the time.
My last setup showed the SNR as 11.6dB and I saw Download Speed of between 12000- 13000 kpbs
Does your log show how often the link has dropped in the last 24 hours?

Could you tell whether it is a issue with the IP or the ADSL. As whenever I have see the link fail the ADSL Sync is always up.

PS: I notices that when I used the Netgear router to check the service I stayed up and did not lose the IP.

The DSL2460R has the ADSL Idle Time Out is default=30.
Is that used as the keepalive for the link?