Connection drops

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azkurz
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Connection drops

Post by azkurz » Fri Nov 26, 2010 12:14 pm

Yo!

My connection drops a little now and then. The ADSL light starts blinking and I gotta pull power plug to get a new signal from my ISP again.

Could you please see if there is something wrong in my system diagnostics?

Thanks,
Oskar
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thechief
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Re: Connection drops

Post by thechief » Fri Nov 26, 2010 12:28 pm

You need to defragment your environment. Also, your US margin is low, but I don't think that either of these is the cause of the problem. It may just be that your connection speed is too high for you to maintain a stable connection.

Run this code from a telnet/ssh login session

Code: Select all

setenv DSL_FEATURE_CNTL_0 0x03000000
setenv DEFRAG DEFRAG
/sbin/reboot
The DSL_FEATURE_CNTL_0 setting trades connection speed for stability. If it doesn't help, then you can delete it

Code: Select all

unsetenv DSL_FEATURE_CNTL_0
You may also want to enable check-sync in the "RT Configurations" page.
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Re: Connection drops

Post by azkurz » Fri Nov 26, 2010 1:59 pm

I'm so happy I foud this site! I'm ordering the RT mug to show some love :)

I ran degrag now.

Also I noticed just after the connection died again the error log looked different.

Crossing my fingers it will hold up better now.

Thanks
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Re: Connection drops

Post by thechief » Fri Nov 26, 2010 2:21 pm

I'm sure the mug would look cool on your desk! :)

The diagnostics still show the environment as fragmented as it was before. Did you run all the commands that I gave above? If so, then nothing seems to have happened (possibly because the environment is still badly fragmented). You should run this (from telnet) before doing anything else

Code: Select all

setenv DEFRAG DEFRAG
And then run these commands (also from telnet)

Code: Select all

setenv DSL_FEATURE_CNTL_0 0x03000000
/sbin/reboot
And what is going on here?
Upstream rate (kbps): 0
Downstream rate (kbps): 0
WAN uptime: N/A
WAN IP address: N/A
What exactly is your set-up?
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Re: Connection drops

Post by azkurz » Fri Nov 26, 2010 3:13 pm

Mug is on it's way :)

I forgot to mention that the previous log was before I ran defrag, just after the connection died.

It looks much better now
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Re: Connection drops

Post by azkurz » Fri Nov 26, 2010 3:38 pm

Connection just died again :(

Could my router fiddle with the modem? I have the MTU set to 1492.
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Re: Connection drops

Post by thechief » Fri Nov 26, 2010 4:37 pm

thechief wrote:And then run these commands (also from telnet)

Code: Select all

setenv DSL_FEATURE_CNTL_0 0x03000000
/sbin/reboot
You have not done this.
thechief wrote:What exactly is your set-up?
You have not answered this.
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Re: Connection drops

Post by azkurz » Fri Nov 26, 2010 5:23 pm

Ah, I ran unsetenv DSL_FEATURE_CNTL_0.

Changed to "setenv DSL_FEATURE_CNTL_0 0x03000000" now.

My setup is the DSL-320T in bridge mode to a DLINK DIR-655 router that does the PPPoE connection. My neighbour has the same setup, modem in bridge mode and same router and also gets connection drops once or twice a day so it might just be the ISP.

I did notice however when using the old Thomson Speedtouch router that was provided by the ISP the connection rarely drops. I prefer not to use that router though as my ISP has put a locked custom firmware on it where I can't even turn off the default WEP wifi connection.
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Re: Connection drops

Post by thechief » Fri Nov 26, 2010 5:48 pm

azkurz wrote:My setup is the DSL-320T in bridge mode to a DLINK DIR-655 router that does the PPPoE connection.
I don't understand this. If the DIR-655 provides the pppoe connection, then why do you need the 320T? I would have thought that the 320T should provide the pppoe (WAN) connection, while the DIR-655 provides the LAN (wired and wireless) services?
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Re: Connection drops

Post by azkurz » Fri Nov 26, 2010 6:38 pm

Thats how I had it before. I had the PPPoE setup in the modem and then the DIR-655 set to DHCP. But I asked if it was better to have the modem set to bridge mode and then let the router handle the login and routing here viewtopic.php?f=9&t=3754.

So I switched to bridge mode.

Connection was still dropping with the old settings as well.
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Re: Connection drops

Post by thechief » Fri Nov 26, 2010 8:20 pm

azkurz wrote:Connection was still dropping with the old settings as well.
Yes - but there are things that you can do with RouterTech firmware to address that problem - e.g., the "setenv DSL_FEATURE_CNTL_0 0x03000000" fix, enabling sync checking, trying different modulations, or even going for a firmware version with a more recent DSP driver. With your current set-up, nothing that you do with the 320T is going to help.

I know nothing about bridging, so I don't know whether your current set-up is the best.
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Re: Connection drops

Post by mstombs » Fri Nov 26, 2010 10:16 pm

DLink dir655 is going to be much more powerful for nat routing wireless N etc - the 320T is a 2MB flash, 8MB ram 1-port modem. The dir doesn't have an ADSL port, so always needs an Ethernet modem. Offloading the modem of memory intensive nat tasks makes sense to me - but unless the modem is running out of ram and crashing its not going to make any difference. I don't know anything about the dir 655 - can you even see the modem web gui when in full bridge mode?
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Re: Connection drops

Post by azkurz » Sat Nov 27, 2010 11:06 pm

Could it be that full bridge mode is not really supported by the DSL-320T that causes it to crash?
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Re: Connection drops

Post by thechief » Sun Nov 28, 2010 9:14 am

I thought you were talking of connections being dropped. Where does crashing come into it?
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Re: Connection drops

Post by azkurz » Sun Dec 05, 2010 11:37 am

Sorry for not being clear. I'm not back to PPPoE instead of bridge mode on the modem and my connection has been running fine for 12 hours :)

Thanks again for the support, my new router tech mug is hot! :

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