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billdeven
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Message 1 of 26
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Slow broadband and high latency during the evening

My broadband speed is usually about 70 Mbits/s down, 5 Mbits/s up. For the last few days during the evening, download speeds have been .5-1 Mbit/s, so streaming is virtually impossible. Also the connection is unstable with high latency. Speed has been returning to normal during the day.

No reports of problems on the service status page. Is this network congestion or is there a network problem that hasn't been reported? My postcode is BS8 4TU. Hope someone can help out. Thanks.

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Superuser
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Message 2 of 26
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Re: Slow broadband and high latency during the evening

How are you connecting wired or wirelessly?

If wireless, try wired directly to the hub with a Cat 5e cable or better 

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billdeven
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Message 3 of 26
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Re: Slow broadband and high latency during the evening

Thanks for the advice. I have both wired and wireless devices. Both have a problem with broadband speed and latency during the evening. This morning speeds have returned to normal as usual, but I am expecting the problem to return this evening. I have Think Broadband's quality monitor switched on. I could post current graph if that would help diagnose.
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Superuser
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Message 4 of 26
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Re: Slow broadband and high latency during the evening

The BQM would help, it would highlight any contention issues on your local circuit, which it does sound like if devices connected directly to the Hub by Ethernet cable are affected.

 

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billdeven
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Message 5 of 26
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Re: Slow broadband and high latency during the evening

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Superuser
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Message 6 of 26
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Re: Slow broadband and high latency during the evening

Were you doing a lot of uploading\downloading during the evening at the time of the graph?

The graph is not showing a significant rise in minimum latency which would suggest the downstream is not congested, but the upstream could be saturated either by heavy uploading/downloading or there is a contention issue/impairment on the upstream. The gradual ramps of the average latency would suggest the latter.

Posting the Hub's power levels and network logs may yield a few more clues.

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billdeven
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Message 7 of 26
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Re: Slow broadband and high latency during the evening

Hi, Thanks for your reply. I've not been doing any significant uploading. Last night I attempted to download a programme on iplayer as streaming not working properly. It took 2.5 hours 

The Virgin Media Hub 2 is in modem mode which does not give me access to the advanced settings. How do I get to the logs?

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Superuser
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Message 8 of 26
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Re: Slow broadband and high latency during the evening

http://192.168.100.1

Don't log in just click the router status button.

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billdeven
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Message 9 of 26
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Re: Slow broadband and high latency during the evening

Downstream

DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 139000000 147000000 155000000 163000000 171000000 179000000 187000000 195000000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 1 2 3 4 5 6 7 8
Modulation 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Symbol Rate (Msym/sec) 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level (dBmV) -4.51 -3.58 -2.91 -2.75 -2.86 -2.58 -2.02 -1.75
RxMER (dB) 30.88 31.34 33.72 34.08 33.72 33.27 32.96 35.08
Pre RS Errors -375932902 1841279152 19377966 6316494 10828034 7578517 361976280 12783025
Post RS Errors 7352003 832041259 19221 5301 4339 4824 159247 5670

Network Log

84020200 Lost MDD Timeout

multiple entries

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billdeven
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Message 10 of 26
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Re: Slow broadband and high latency during the evening

Downstream
 
DS-1DS-2DS-3DS-4DS-5DS-6DS-7DS-8
Frequency (Hz)139000000147000000155000000163000000171000000179000000187000000195000000
Lock Status(QAM Lock/FEC Sync/MPEG Lock)LockedLockedLockedLockedLockedLockedLockedLocked
Channel ID12345678
Modulation256QAM256QAM256QAM256QAM256QAM256QAM256QAM256QAM
Symbol Rate (Msym/sec)6.9526.9526.9526.9526.9526.9526.9526.952
Interleave DepthI=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
I=12
J=17
Power Level (dBmV)-4.5-3.57-2.86-2.7-2.87-2.55-2.05-1.75
RxMER (dB)30.7631.434.0834.0833.7233.2733.0635.08
Pre RS Errors-362908026185446357219544518635929310858504764687436594996112783108
Post RS Errors7367746836846114192215301433948241592475670
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