Need help with Internet connection - Virgin Media.

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6 May 2009
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371
Hey all,

Right so for the past five days or so the Internet connection in my house has been abysmal. We are on the 20MB package from Virgin and so I am aware of their throtle policies.

Anyway the problem is that eveyone in my house is experiencing slower than usual Internet during the day (with one pc experiencing constant timeouts, then again it is still on XP and may experience the symptomns differently, who knows). The Internet is better (not perfect) during the night.

At first I though it was Virgin throttleing us. But nobody has been downloading anything other than the occasional stream of a video on Youtube and just normal webpages. I keep trying to play on my Xbox (and pc with Skype) but just get intermittent breakups in voice and lag in games even though my connection and eveyone else's in whatever game I'm in is green. I experience lag but it's a very odd lag where there is a delay but it "feels" different to normal lag (from say if someone was doing torrents etc).

Speedtest.net says my download and upload speeds are high (well within the limits of what we are paying for) This is most of the time. Sometimes it can read as only 5mbps. Pingtest.net gives me a ping of about 290-360 and most of the time it is unable to measure packet loss or one time said 8%. This is the problem I beleive.

What would cause this packet loss? We phoned Virgin but they apparently said they couldn't detect anything wrong with our connection... I'm lost as to what to do to sort this.

Any ideas people? Cheers.
 
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http://192.168.100.1

Go to that page, it should be the setup page for the cable modem. Log in (root/root should be the default settings, no reason to change them). I'm assuming you have one of the black virgin modems and not an older NTL or the superhub.

First go into Downstream ahd check the Downstream Receive Power Level and Downstream SNR.

DOWNSTREAM POWER (Optimal)
Rule of thumb: -3 dBmv to +6 dBmv

SNR (RxMER) - DOWNSTREAM
64QAM 29 dB minimum; 32 dB or above desired
256QAM 32 dB minimum; 35 dB or above is desired

Finally, go to the upstream page and check the transmit power level.

UPSTREAM POWER (Optimal)
35 dBmv to 50 dBmv

All figures taken from here.

If any of the values you get are hugely out, that may be the problem.
 
Those both look fine, how about the downstream SNR?

Also, open up a command prompt (Run > cmd or just type cmd into the windows 7 start menu). In there run:
tracert google.co.uk

Let that run and then print screen the result and post it here.
 
Post on their forums, staffed by 2nd line engineers and I've always had really good service from it unlike their phone line.
 
This happened to me. When I was away at uni my mum used the internet for maybe 3 hours every 2/3 days and only went on things like facebook etc. She's on 10mb I think, not entirely sure.

When I moved back the internet was constantly at 250kbps for ~3 days. When I called the virgin tech support I got through to a guy and he said change the router password (I didn't, just agreed with everything he said) and he said go on speedtest.net and see if it's better. No surprises when it was. According to him someone was on our wireless downloading, and changing the password kicked them off...
 
Those both look fine, how about the downstream SNR?

Also, open up a command prompt (Run > cmd or just type cmd into the windows 7 start menu). In there run:
tracert google.co.uk

Let that run and then print screen the result and post it here.

Downstream SNR is 35.4 dB

Noob question but how do I run that command in cmd? Typing it doesn't work and neither does run then the command.
 
This happened to me. When I was away at uni my mum used the internet for maybe 3 hours every 2/3 days and only went on things like facebook etc. She's on 10mb I think, not entirely sure.

When I moved back the internet was constantly at 250kbps for ~3 days. When I called the virgin tech support I got through to a guy and he said change the router password (I didn't, just agreed with everything he said) and he said go on speedtest.net and see if it's better. No surprises when it was. According to him someone was on our wireless downloading, and changing the password kicked them off...

I would agree with this if the password was simply the word password but it's not. We have a unique password that only we know of.
 
I would agree with this if the password was simply the word password but it's not. We have a unique password that only we know of.

He's saying that they didn't change the password, and that the tech clearly changed something at their end to start it working properly again, while blaming it on the weak password for some reason.

What happens when you type it in the command prompt? Do you get an error message?
 
It could be one of the PCs on the network has become infected with something nasty which is sending out masses of spam or some such. To check this, disconnect everyone and leave just one PC connected and see if it's still bad. If it is, try the same again but with a different PC.

Also, does everyone connect to it wirelessly? If so, it could be something has come up that is interfering with your wireless. You should try connecting a network cable and see if it's still the same.

Once you've eliminated it being anything to do with your network/PCs, I would say it's down to Virgin to sort it out. You shouldn't be having to check SNRs etc.
 
Well, looking at the tracert the connection to the router itself seems file <1ms ping for those hops. But there's one point where the pings shoot up.

Would you be able to run it a couple more times? See if its always the same hops causing the issues, or if its something happening to wireless network that just makes all traffic take much longer to arrive for a short time.

Edit: chaos probably best to ask on the VM forum, they know way more than I pretend to. As the adage says, if it ain't broke, don't fix it. If you're getting 50Mb speeds, leave things as they are, though if something does start to play up, that's a good thing to point the finger at.
 
Well, looking at the tracert the connection to the router itself seems file <1ms ping for those hops. But there's one point where the pings shoot up.

Would you be able to run it a couple more times? See if its always the same hops causing the issues, or if its something happening to wireless network that just makes all traffic take much longer to arrive for a short time.

Edit: chaos probably best to ask on the VM forum, they know way more than I pretend to. As the adage says, if it ain't broke, don't fix it. If you're getting 50Mb speeds, leave things as they are, though if something does start to play up, that's a good thing to point the finger at.

Ok i ran it again and it seems a lot worse...

http://imageshack.us/photo/my-images/840/testvte.png/
 
virgin are rubbish... i havent been able to access my email with them for over a week... broken link everytime i click the email logo on there website
 
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