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Standard User cochon
(newbie) Mon 24-Jun-13 23:11:10
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Jumpy Speed Test Result


[link to this post]
 
I am having some issues with my Sky broadband - my router is connected at ~18 mbps but I am getting download speeds far lower. I have just run the speed test on this site and the graph seems to be jumping all over the place. Could this mean that there are some packet loss issues?

Link

Here are my connection stats:

Broadband Link Downstream Upstream
Connection Speed 18999 kbps 1212 kbps
Line Attenuation 22.0 dB 13.4 dB
Noise Margin 3.1 dB 8.9 dB

Thank you in advance for any help.

Edited by cochon (Mon 24-Jun-13 23:16:09)

Standard User camieabz
(sensei) Mon 24-Jun-13 23:17:56
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Re: Jumpy Speed Test Result


[re: cochon] [link to this post]
 
I wouldn't say packet loss without seeing a TBB BQM graph of your line. It might be CPU load, security software, or something else locally at your end.

Try the BQM tool:

http://www.thinkbroadband.com/ping

See the 'all connection data' in my sig for a working example. If you have noticeable packet loss, you'll see some red in your graph (as opposed to blue, yellow, green).

~ Camieabz ~

All Connection Data ~ Some plusnet links

I've forgotten more about broadband than I care to remember.
Standard User RobertoS
(sensei) Mon 24-Jun-13 23:18:24
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Re: Jumpy Speed Test Result


[re: cochon] [link to this post]
 
Ouch!

Is that wired or wirelessly connected to your router, and is anyone else also connected? Is the wireless access point of your router protected with encrypted WPA2 or higher?

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 53.4/16.8Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.


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Standard User RobertoS
(sensei) Mon 24-Jun-13 23:20:08
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Re: Jumpy Speed Test Result


[re: camieabz] [link to this post]
 
The BQM idea is a possibility, but don't forget the OP will have a dynamic IP address.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 53.4/16.8Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
Standard User cochon
(newbie) Mon 24-Jun-13 23:27:30
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Re: Jumpy Speed Test Result


[re: RobertoS] [link to this post]
 
It's the same for wireless or wired, no one else is connected and WPA2 is enabled.

I've also tried it with different devices - same results.
Standard User RobertoS
(sensei) Mon 24-Jun-13 23:43:51
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Re: Jumpy Speed Test Result


[re: cochon] [link to this post]
 
What does pingtest.net give you?

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 53.4/16.8Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
Standard User cochon
(newbie) Tue 25-Jun-13 07:09:46
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Re: Jumpy Speed Test Result


[re: RobertoS] [link to this post]
 
Packet loss: 0%
Ping: 29 ms
Jitter: 3 ms
Standard User MHC
(sensei) Tue 25-Jun-13 10:10:32
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Re: Jumpy Speed Test Result


[re: camieabz] [link to this post]
 
CPU load is unlikely given that it happens on the basic initial test before the 6x. It drops to near zero, so if it it happening then I would expect it to drop to zero on 6x too.


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M H C


taurus excreta cerebrum vincit
Standard User cochon
(newbie) Tue 25-Jun-13 23:41:27
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Re: Jumpy Speed Test Result


[re: camieabz] [link to this post]
 
Here is my result from the BQM tool:

http://www.thinkbroadband.com/ping/share/1c267288392...

Please ignore the 100% packet loss around 8-9pm, I was swapping routers and trying out the test socket, so there wasn't always a connection.
Standard User camieabz
(sensei) Wed 26-Jun-13 00:06:28
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Re: Jumpy Speed Test Result


[re: cochon] [link to this post]
 
I didn't see the graph before, but I do now (cheers Roberto).

Leaving aside the 8pm-9pm bit, there's a tiny bit of packets loss (the red dots along the top). This is nothing to worry about. The ping looks fine at 30ms or less. As Roberto says, after the router switch, you have far more latency (yellow) on the line, but this might be the line in use?

Best to look at it on its quiet period (usually during the night) to see jitter or spikes, and if possible leave it for an evening to see how an idle line in the busy period is (not easy to not use the broadband, I know smile ).

I see your downstream SNR is 3.1dB...is this intentional? The standard setting is usually 6dB*. You might be getting a little trouble from that, but you'll need to monitor your linestat errors (especially the ES errors).

* I'm not familiar with Sky's default settings, so it might be spot on. Also not sure about interleave and fastpath on Sky (Google for both terms for an explanation).

~ Camieabz ~

All Connection Data ~ Some plusnet links

I've forgotten more about broadband than I care to remember.

Edited by camieabz (Wed 26-Jun-13 02:56:34)

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