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danjking94
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High Latency / Spikes

Hi all,

I have just moved into a new flat (sharing with the landlord, so not the main account holder) and have noticed that the internet connection is very unstable. There is a consistent level of latency variation, as shown in the Broadband Quality Monitor below (every day looks the same):

danjking94_0-1600601228485.png

The net isn't being used for anything intensive (or at all, really, as the issue can be seen through the entire day on the graph). I have tried restarting the router, connecting with a wire and with multiple devices and the issue persists.

I am wondering if this is potentially a fault in the area, or just the result of overuse (I am living in a large block of flats with multiple connections visible from my room). 

If there are any more tests / info that I can do / provide then please let me know as I would like to troubleshoot this as much as possible.

Many thanks!

 

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waveuk
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Re: High Latency / Spikes

Which area are you? I have a very similar situation that has been going for months now.

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MikeRobbo
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Alessandro Volta
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Re: High Latency / Spikes

Have you checked the 'Check Service Status' at the top of the page ?

If nothing is showing try phoning 0800 561 0061, this will tell you of more local issues that may be affecting the area. Be aware that it isn't a manned line.

Go round all the accessible co-ax connections and ensure that they are finger tight.

If everything above is OK we need do some more troubleshooting; to start with …

 

Can you set up a Broadband Quality Monitor (BQM) at thinkbroadband.com - this will give you an insight into what is happening with the signal at the other side of the Hub, it will take a few hours to get any kind of trend showing although you should post the link straight away.

Post a link to your BQM on here.

Instructions for posting BQM Link

Under your BQM graph are two links in red.

Click the lower link (Share Live Graph) then click generate.

Copy the text in the Direct Link box, beware, there may be more text than you can see.

On here click the Link icon (2 links chain to the left of the camera icon)

In the URL box paste the link you copied and in the ‘text to display’ box write My BQM then click OK - you can post the link straight away.

Then

 

Can you please

Type 192.168.0.1 (192.168.100.1 in Modem mode) into your browser URL bar and press enter. 

Hub 2 & 3 When the page appears DO NOT LOG IN but click ‘Check Router Status’.

Hub 4 When the page appears LOG IN then click ‘Check Router Status’.

Copy and paste the contents of the Downstream, Upstream and Network Log tabs onto here, if you get a yellow warning click the Post button again. Use one post for each tab if you wish. Please do not use screen grabs.

A Guru will be along soon to decipher the info.


*********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.
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danjking94
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Re: High Latency / Spikes

Hi Mike,

Thanks for your response. All the co-ax connections are right and the service status page doesn't say there are any issues. This is in Elephant and Castle in London.

My BQM I have had this live for a few days, and did reset the router today as the net completely dropped.

For the router status info:

Downstream:

Downstream  DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8146750000 Hz 138750000 Hz 154750000 Hz 162750000 Hz 170750000 Hz 178750000 Hz 186750000 Hz 194750000 HzLocked Locked Locked Locked Locked Locked Locked Locked2 1 3 4 5 6 7 8QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM2566.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000I=12J=17 I=12J=17 I=12J=17 I=12J=17 I=12J=17 I=12J=17 I=12J=17 I=12J=172.1 dBmV 2.1 dBmV 1.9 dBmV 1.3 dBmV 3.1 dBmV 3.0 dBmV 2.8 dBmV 2.1 dBmV40.1 dB 38.2 dB 40.3 dB 40.8 dB 39.3 dB 39.1 dB 38.6 dB39.0 dB

Frequency (Hz)
Lock Status(QAM Lock/FEC Sync/MPEG Lock)
Channel ID
Modulation
Symbol Rate (Msym/sec)
Interleave Depth
Power Level (dBmV)
RxMER (dB)

 

 

Upstream:

Upstream  US-1 US-2 US-3 US-42.0 2.0 2.0 2.010 9 7 832600000 Hz 39400000 Hz 53700000 Hz 46200000 HzSuccess Success Success SuccessQAM64 QAM64 QAM64 QAM645120000 5120000 5120000 512000064 64 64 6449.3 dBmV 49.5 dBmV 50.3 dBmV 50.3 dBmV0 0 0 00 0 0 03 3 3 30 0 0 0

Channel Type
Channel ID
Frequency (Hz)
Ranging Status
Modulation
Symbol Rate (Sym/sec)
Mini-Slot Size
Power Level (dBmV)
T1 Timeouts
T2 Timeouts
T3 Timeouts
T4 Timeouts

 

 

Network log:

20/08/2020 15:04:23  20/08/2020 15:04:23  Critical (3)  82000500  Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 

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legacy1
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Alessandro Volta
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Re: High Latency / Spikes

You have a super hub 1 you need to use modem mode for it to be stable over a long time or just reboot it like you have done.

To stop spikes from happening get a router with QoS.

 

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