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DSL Speed problems (formally: Speed is down considerably )

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DSL Speed problems (formally: Speed is down considerably )

Hi there,

I know that there is another thread on this topic in this forum, but reading through it, I find myself getting very lost! I'm not that literate when it comes to adsl, and was just wondering if there is anyone out there who might be able to help me out in non techie language Smiley

Over the last 3 days or so, I've been conductiong bandwidth tests through plusnet and have been getting readings of below 300kb/s - this has dropped from the 500 odd I was getting only a few days ago. Could anyone suggest what could be wrong? I'm aware of contention ratios and things like that, but I didn't think that the connection would still be slow after a couple of days.

I'm on the adsl home 500 connection with 2 computers hooked up to the net via a router. I reset the router the other day, but I was under the impression that that wouldn't have made any difference to the speed of the connection.

Please forgive me and my mack of adsl knowledge...any advice that people can give is much appreciated Smiley
56 REPLIES
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DSL Speed problems (formally: Speed is down considerably )

Hi,

Its been slower today for me too it seems to take ages for web pages to load up, but over the last week or so plusnet seems to have slowed down.


It was fine about 2 weeks ago, and ive not made any changes to anything.
Ianwild
Grafter
Posts: 3,835
Registered: 05-04-2007

DSL Speed problems (formally: Speed is down considerably )

Hi you two -

I will add you to my list of customers who are experiancing problems, but I do need you to log this via the Contact US system on the portal, just so I have a reference to work from.

Regards,

Ian
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DSL Speed problems (formally: Speed is down considerably )

ok thanks ian
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DSL Speed problems (formally: Speed is down considerably )

Quote
I'm on the adsl home 500 connection with 2 computers hooked up to the net via a router.


When you are running the speed tests, make sure that only one computer is powered up and that you are not using your connection for anything else.

Tim
Ianwild
Grafter
Posts: 3,835
Registered: 05-04-2007

DSL Speed problems (formally: Speed is down considerably )

Quote
ok thanks ian


Here is something I would be very grateful if you (And anyone else experiancing this problem) could try. If it gets a bit lengthy, don't worrry too much about it - It's just a thought that stems from you saying this problem occured after you rebooted your router.

Some background first:

I have been looking at all of the problems reported in this forum in relation to speed. It hasn't been easy as there doesn't seem to be much consistancy between the symptoms different people are reporting. The only pattern I have found is that the people who have posted traceroutes seem to be seeing a problem only when they are connected to our second ADSL termination unit (The Redback).

I want to try and confirm this by asking people to look what Redback they are using and when they are seeing these problems and I would also like to try seeing if, by connecting to Redback 1, the problem improves. It is totally random, when you connect, as to which Redback you will connect through.

To find out what Redback you are connected to you need to use a Traceroute utility. There are many differnt ways to do this, but my favourite is WinMTR. You can run it directly by clicking here and saving or opening the file. The program is pretty self explanatory to use and is very useful for detecting intermittent problems as it continually collects data until you stop it.

The idea of Traceroute is that it shows you the Internet route to any website you chose and it also shows you the time taken to get to each hop on the route - Useful if you are looking for a bottle neck or cause of a speed problem! If you do a traceroute to any site (For example www.yahoo.com) in WinMTR, you will see that the first (or second if you use a router) hop on the route is on our network. It will be called something like "lo1.plusnet.pth-ag2.plus.net", "lo1.homesurf.pth-ag2.plus.net", "lo0.plusnet.pth-ag1.plus.net" etc. In this output, ag1 is Redback one and ag 2 is Redback two, which is where I think there might be a problem.

If you are having a problem on Redback 2, it would be very helpful to find out if by disconnecting and re-connecting you can get connected to a path which goes via Redback 1. As I said, this is random, so it may take a few attempts. It would also be interesting to see if WinMTR records any packet loss while running. If it does, you can easily copy and paste the results here as these should help us too. You should note though that on any connection, packet loss of below about 5% is generally acceptable and won't have an impact. Packet loss before the 1st hop on our network is caused within BTs ATM network (Which is transparent to traceroute) but it is still very interesting to know about.

I think I may have made that all too complicated, so if it is I will try explaining again tomorrow. I hope people won't mind working with me to get to the bottom of this - It is an exceptionally complicated problem and in the last two days I have spent a lot of time looking, but haven't really got very far in understanding what is happening...

Regards,

Ian
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DSL Speed problems (formally: Speed is down considerably )

Here's a couple of tracerts to google both ag1/ag2 pretty
similar I dont think these tracert programmes are revealing
much. Line speed constantly about 53KB/s previously 61KB/s,
so not a huge drop in performance as others reporting.
|------------------------------------------------------------------------------------------|| WinMTR statistics |

| Host - % | Sent | Recv | Best | Avrg | Wrst | Last |

|------------------------------------------------|------|------|------|------|------|------|

| lo1.plusnet.pth-ag2.plus.net - 0 | 101 | 101 | 15 | 31 | 78 | 31 |

| gi1-2.vlan3.pth-gw4.plus.net - 0 | 101 | 101 | 16 | 31 | 62 | 31 |

| gi5-0-4.pth-gw1.plus.net - 0 | 101 | 101 | 31 | 31 | 62 | 31 |

| LINX.LON-1-eth110.uk.lambdanet.net - 1 | 100 | 99 | 31 | 31 | 47 | 31 |

| F-2-pos310.de.lambdanet.net - 4 | 100 | 96 | 46 | 47 | 93 | 47 |

| 217.71.105.42 - 4 | 100 | 96 | 46 | 48 | 79 | 47 |

| Google-F.de.lambdanet.net - 3 | 100 | 97 | 46 | 47 | 78 | 47 |

| 216.239.48.146 - 2 | 100 | 98 | 62 | 70 | 109 | 63 |

| 216.239.49.18 - 3 | 100 | 97 | 62 | 78 | 141 | 79 |

| 66.102.11.99 - 3 | 100 | 97 | 62 | 74 | 110 | 62 |

|________________________________________________|______|______
|------------------------------------------------------------------------------------------|

| WinMTR statistics |

| Host - % | Sent | Recv | Best | Avrg | Wrst | Last |

|------------------------------------------------|------|------|------|------|------|------|

| lo0.plusnet.pth-ag1.plus.net - 0 | 100 | 100 | 16 | 32 | 78 | 31 |

| gi1-2.vlan3.pth-gw3.plus.net - 0 | 100 | 100 | 15 | 31 | 63 | 31 |

| gi5-0-4.pth-gw1.plus.net - 0 | 100 | 100 | 16 | 31 | 32 | 31 |

| LINX.LON-1-eth110.uk.lambdanet.net - 3 | 100 | 97 | 31 | 32 | 78 | 31 |

| F-2-pos310.de.lambdanet.net - 1 | 100 | 99 | 46 | 48 | 94 | 47 |

| F-8-eth030-0.de.lambdanet.net - 1 | 100 | 99 | 46 | 47 | 78 | 47 |

| Google-F.de.lambdanet.net - 2 | 100 | 98 | 46 | 48 | 94 | 47 |

| 216.239.48.146 - 2 | 100 | 98 | 62 | 74 | 110 | 110 |

| 216.239.49.18 - 3 | 100 | 97 | 62 | 80 | 110 | 78 |

| 66.102.11.99 - 4 | 99 | 96 | 62 | 72 | 94 | 78 |

|________________________________________________|______|______
Ianwild
Grafter
Posts: 3,835
Registered: 05-04-2007

DSL Speed problems (formally: Speed is down considerably )

Hi,

Thanks. This is what I mean about people having different problems. I have to be frank though, BT would say that this sort of speed is perfectly acceptable on the basis of a 50:1 exchange contention. I'm not sure I agree with that, but what I am hoping is that by fixing the serious problems people have, the smaller ones will also get sorted.

Regards,

Ian
Ianwild
Grafter
Posts: 3,835
Registered: 05-04-2007

DSL Speed problems (formally: Speed is down considerably )

I'm also going to make this thread sticky, as I want to ensure we get as much information as possible in the one thread, now that the other thread on the subject is closed.
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DSL Speed problems (formally: Speed is down considerably )

Perhaps some kind of form, to store the data in a database, is in order? Would help you collect together different traceroutes, times of the problem, etc.

Just an idea Smiley
Ianwild
Grafter
Posts: 3,835
Registered: 05-04-2007

DSL Speed problems (formally: Speed is down considerably )

Not a bad idea - I will have a think about that today. At least a consistent way of reporting these problems would help...

Ian
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DSL Speed problems (formally: Speed is down considerably )

ok ian i did that thing you asked us, i used that program and did it using yahoo.com


|------------------------------------------------------------------------------------------|
| WinMTR statistics |
| Host - % | Sent | Recv | Best | Avrg | Wrst | Last |
|------------------------------------------------|------|------|------|------|------|------|
| lo1.plusnet.pth-ag2.plus.net - 0 | 163 | 163 | 10 | 19 | 30 | 20 |
| gi1-2.vlan3.pth-gw4.plus.net - 0 | 163 | 163 | 10 | 20 | 30 | 20 |
|gigabitethernet2-1-110.ipcolo1.London1.Level3.net - 0 | 163 | 163 | 20 | 20 | 30 | 20 |
| ae0-51.mp1.London1.Level3.net - 0 | 163 | 162 | 20 | 21 | 30 | 30 |
| so-1-0-0.mp1.London2.Level3.net - 0 | 162 | 162 | 20 | 21 | 31 | 31 |
| so-1-0-0.bbr1.Washington1.level3.net - 0 | 162 | 162 | 90 | 93 | 111 | 100 |
| gige7-1.ipcolo1.Washington1.Level3.net - 0 | 162 | 162 | 90 | 96 | 111 | 110 |
| unknown.Level3.net - 0 | 162 | 162 | 90 | 94 | 121 | 100 |
| vl31.bas2-m.dcn.yahoo.com - 0 | 162 | 162 | 90 | 98 | 461 | 100 |
| p10.www.dcn.yahoo.com - 0 | 162 | 162 | 90 | 96 | 120 | 100 |
|________________________________________________|______|______|______|______|______|______|
WinMTR - 0.7. Copyleft @2000-2001 Vasile Laurentiu Stanimir ( stanimir@cr.nivis.com )


i didnt seem to stop so i just copied it and pasted
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DSL Speed problems (formally: Speed is down considerably )

umm iWild i have replied with the traceroutes u need on my ticket - shud help lots of loss to work with >:¬)
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DSL Speed problems (formally: Speed is down considerably )

Others have reported problems with Redback 1 before - see http://portal.plus.net/central/forums/viewtopic.php?t=11025.

Tim
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DSL Speed problems (formally: Speed is down considerably )

Hi there, her's my 2o's worth, definineley slower according to +nets own speed tester. Even got the logs from previous tests for comparison.
Hope this helps.
Todays speed test: 440.5 kbps YOU

460 kbps ADSL 500
920 kbps ADSL 1000
1840 kbps ADSL 2000


The following table shows the speeds you achieved from previous runs of the speed tester:

Date Speed Achieved (kbps)
18-10-2003 11:27:54 486.7
11-09-2003 08:59:27 484.5
24-08-2003 11:51:21 490.7