D-Link 2500U modem help

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vespax

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I have been having problems with my ADSL for some time now.

I have narrowed it all down to the modem, which basically died on me yesterday so I bought a new D-Link 2500U to use. I can't get it to connect though. I need some help getting it to take the settings I need from my ISP (Webafrica). I was on the phone to WA for some time and they struggled to get it to go. Finally he told me I needed to tell Telkom it was an error 678.

When I run the tests on the modem I get this returned:

Test the connection to your local network

Test your ENET Connection: PASS

Test the connection to your DSL service provider
Test ADSL Synchronization: PASS
Test ATM OAM F5 segment ping: FAIL
Test ATM OAM F5 end-to-end ping: FAIL

Test the connection to your Internet service provider
Test PPP server connection: PASS
Test authentication with ISP: PASS
Test the assigned IP address: PASS
Ping default gateway: PASS
Ping primary Domain Name Server: FAIL

So can I conclude that it is connecting to WA in someway, but just can't get past the ping section? What can I do to fix this? I am really struggling to get my DSL line back to normal.

Fortunately, my neighbor has left his DSL WiFi signal open for me to use until I get back on track. ;)
 
Still struggling with it. Got Telkom to help out and I get connected to the internet, but it is hit and miss. Google, Yahoo and the likes work fine but smaller sites won't load.

I really thought it was the modem crashing, but the same thing occurs on this new modem (wasted R500 it seems).

Anyone have any ideas?
 
I got some help from Telkom this morning and the tech guy helped me out.

It seems to have been the DNS addresses that my ISP was giving that caused the problems. I have a new address in each of my computers that over rides the ISP address and it has been working like a charm ever since. Go figure, the solution came from Telkom themselves. ;)
 
I should & Telkom tech guy told me I should, but for now I am breathing a sigh of relief that I have internet again. ;)

Will get to it eventually...
 
Thread necromancy, I know, but.... I'm desperate to get this working.

Vespax, what did you eventually do to get it to work? Just set the DNS addresses on the PC?
 
CathJ said:
Vespax, what did you eventually do to get it to work? Just set the DNS addresses on the PC?
Click to expand...

It's usually a case of disabling the automatic DNS in the router (default setting) and entering the DNS servers your ISP gives you (usually on their website in the tech help section). I had the same DNS issue with my D-Link DSL-2650U, and it worked fine after this change. ;)
 
howardb said:
It's usually a case of disabling the automatic DNS in the router (default setting) and entering the DNS servers your ISP gives you (usually on their website in the tech help section). I had the same DNS issue with my D-Link DSL-2650U, and it worked fine after this change. ;)
Click to expand...

I tried that, but it didn't seem to help. I'll give it one last try tonight - anyone know what the DNS servers for Telkom are?

(The problem is that the router syncs and authenticates with the ISP just fine, but I can't browse or ping anything - if I use a url, it just times out, and if I use an IP address it says route to host not found)
 
It's Murphy's law that the fault is always very far away and inconvenient to get to.

I have used a 2500U device in JHB for about a year and found it to be reliable and competent. I run it in bridged mode and allow my Fritz!Box to do the PPPoE to my ISP. I use it because the Fritz works on a different (German) DSL annex to ours, and my (wishful) reasoning is that the D-Link is really cheap to replace if it gets struck my lightning or experiences a surge etc. and may protect my more expensive devices deeper inside my network by sacrificing itself. I know this is a fanciful argument, but it makes me feel a little better :). That's not my problem.

What is driving me insane is that, based on the faultless performance of my JHB 2500U, I bought another one to deploy to my holiday home. The remote site works a little bit differently for now because I am waiting for a buddy to bring me back a second Fritz!Box from Germany where I can get an international version for about a third of the price that the local agents are attempting to extort.

The holiday home 2500U has been configured to do the PPPoE itself (and is not running in bridge mode therefore) and is hanging off a cheap and nasty D-Link DI-624 wireless router to which I have connected my Paradox alarm panel and a DVR with 8 cameras. Following Murphy's Law, while I was there for over a week everything worked 100%. No sooner had I driven back to JHB than my infuriating problem started.

From observation, it appears that Telkom disconnects my DSL sessions every 24 hours. The JHB installation handles this with ease, and the Fritz renegotiates and acquires a session mere seconds later. The coastal property's 2500U gets its session dropped at the end of 24 hours, and then does not acquire a new one. I have to ask my caretaker to go and unlock a cupboard, "locate the smallest box with blinky green lights on it" and pull its power for 10 seconds and plug it back in. The 2500U then acquires a session and all is well for the next 24 hours.

I have examined the logs at my ISP, and the session is just terminated and never comes back until I physically restart the 2500U - and there are no hanging sessions. I have been through the WAN and other settings with a fine-tooth comb, but cannot see any setting that might help.

Has anyone else had this problem with a 2500U doing PPPoE?

I am toying with the idea of using a programmable output on my Paradox alarm panel to trigger a relay to cut power to the 2500U when I send it an SMS, and I probably will go ahead with this to have a 'last resort' solution, but sheesh : why isn't the cheapie 2500U behaving properly? Any ideas would be gratefully received.
 
Shadowfax said:
I have to ask my caretaker to go and unlock a cupboard, "locate the smallest box with blinky green lights on it" and pull its power for 10 seconds and plug it back in.
Click to expand...
Is it not maybe a heat/ventilation issue?
 
Don't think so. I wired up a 12V cooling fan which is extracting air at the top of the cupboard through a specially-drilled hole in the wall, and put a thermometer in there in the week I was down. The temp never exceeded 22 deg C. It's working flawlessly right up until Telkom terminates the session and it takes a hard restart to reacquire.
 
Shadowfax said:
Don't think so. I wired up a 12V cooling fan which is extracting air at the top of the cupboard through a specially-drilled hole in the wall, and put a thermometer in there in the week I was down. The temp never exceeded 22 deg C.
Click to expand...
Not likely, looks like you've done your homework on that side. The only other quick fix you can possibly try is to shift the PPPoE client to the 624 (closer mirrors your JHB config). Not sure how practical it would be to do remotely though?
 
That was the first thing I tried - to get it as close to the JHB config as I could without the Fritz. That junky old DI-624 had problems of its own there : every so often it would panic and reacquire new sessions (for no reason that I could see) and fill up all my concurrent slots at the ISP with hanging sessions. For the first 2 days, I was phoning the ISP twice a day to kill them from their side. I reasoned because the DI-624 was temporary, it wasn't worth upgrading its firmware, so reconfigured to get the 2500U to do PPPoE.

Thanks for your input - really appreciated. I hope someone else has had a similar issue, failing which I could take the JHB 2500U down to the coast to see if it does the same thing. When I have the coastal one up here, it is obviously much easier to stand in front of it and threaten it with a hammer. I have to go down next month for a couple of days, so I could implement that swap as well as the PGM relay gippo that could pull the power on the router remotely if necessary.
 
Shadowfax said:
That junky old DI-624 had problems of its own there : every so often it would panic and reacquire new sessions (for no reason that I could see)
Click to expand...
Since both routers seem to be having session related issues, my guess would be something may not be too kosher with your ADSL profile (assuming the line is stable/clean). I would ask Telkom (or ISP) to reset your port profile.
 
Ja. I did that on day one when the DI-624 was throwing its fits. I got Telkom to regenerate the port, and called them daily for a report : all clean, no errors at all in the previous 24-hour period.

I am kinda assuming that the DSL line is clean. I think I'm going to swap 2500Us as a first step and see if the problem goes away. If it doesn't, by then I should have the second Fritz and can exactly duplicate the setup at the two sites. If it is still happening after that, then it has to be the coastal DSL or the port definition at Telkom.

Interestingly, when the session drops and I call Telkom to check the line, they say that they can see my modem at the other end. It's as if the 2500U just doesn't bother to initiate another PPPoE logon. Obviously, after I get the caretaker to pull the plug, any logs that might have been on the 2500U are gone. When I go down again, I'll let it fail and look at the logs before I do anything else.
 
Shadowfax said:
I think I'm going to swap 2500Us as a first step and see if the problem goes away.
Click to expand...
Yeah thats what I would try, preferably with a modem utilising a different ADSL chipset e.g. the cheapy Billions which use the Trendchip chipset instead of the 2500U's Broadcom one. The symptoms you are getting are usually not related to this though, but one never knows.

Beyond that, the only other last resort would be to demand that Telkom move you to a different DSLAM port. Its not impossible that they're sometimes sporadically dodgy.
 
make sure that the VPI = 8 and VCI = 35. Also owned the same router and I was struggling to death with that until I decided to check the internet and what do you know. My router was set at VPII = 0 and VCI = 35. So cahnged it and it worked.

Hope this solves your problem
 
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