Problems with Hub 2

[#1]

Thanks, @Townman . I would have thought an expert would have known that.

[#2]

@tudorradulescu @jab1 

Looking at the event log, there have been a few DSL Link Down messages, also a lot of restarting of Hub.

What I have noticed when the Hub was first connected the sysc rate was 

19:37:37, 28 Jan. DSL Link Up: Down Rate=20300kbps, Up Rate=1050kbps; SNR Margin Down=6.3dB, Up=9.0dB

An overnight resync occurred and the upload speed dropped 

03:30:07, 31 Jan. DSL Link Down: duration was 201158 seconds
03:30:43, 31 Jan. DSL Link Up: Down Rate=20813kbps, Up Rate=828kbps; SNR Margin Down=6.4dB, Up=13.6dB
10:51:02, 31 Jan. DSL Link Up: Down Rate=20734kbps, Up Rate=828kbps; SNR Margin Down=6.7dB, Up=14.7dB

Today when the Hub two was used again it is still

12:14:27, 10 Feb. DSL Link Up: Down Rate=20069kbps, Up Rate=828kbps; SNR Margin Down=6.1dB, Up=14.3dB

I would expect the slow upload speed is not helpful with unexpected slowdowns when doing stuff.

The line needs to be checked to see why there has been a 200kpbs upload speed drop. 

Might be time to look at routerstats on the Hub One?

@tudorradulescu is either Hub connected to the Openreach Master Socket? Are there any unused phone extensions which can be removed?

[#3]

Thanks @Dan_the_Van must admit I was not looking at the rates that closely, but a drop to 828kbps and a rise in u/s SNR does look a bit suspicious - hadn't spotted that.

Still interested to know why the SNR figures have remained fairly constant since that initial disco, or is it a feature of EO lines?

[#4]

It would be worth considering the possibility of RFI in the upstream spectrum.

Helpfully the Hub One works well with the version of router stats designed for the BTHH5a

Set the sample interval to 10 seconds, 720 plots per graph. Use the link below to download.

[#5]

Its a while since Ive looked at ADSL2, but if the DLM decides to switch on interleaving on the upstream, doesnt that limit the maximum upstream sync to around the 800Kb ? that would account for the increased SNR

[#6]

I would agree, @MisterW .

[#7]

I thought the issue raised by the OP was disconnections, which seem to have been forgotten.

[#8]

The disconnections could well be the cause of the DLM switching on interleaving in an attempt to stabilise the line.

[#9]

Very possibly, in fact likely, I would have thought - so the reason(s) for  those disconnections need investigating, rather than going down rabbit-holes, no?

[#10]

@tudorradulescu 

The last daytime DSL link down covered by the supplied log

10:45:10, 07 Feb. DSL Link Down: duration was 199467 seconds (just over 55 hours)

10:47:32, 07 Feb. DSL Link Up: Down Rate=20705kbps, Up Rate=828kbps; SNR Margin Down=6.3dB, Up=12.2dB

Have you encountered any issues today? If so can you post the event  log and indicate the time

When the problem occurs do you notice any change of the Hubs light from Blue?

Whats prompts you to switch to using a hotspot?

[#11]

Just a side comment, but this is the kind of issue where sight of the very useful Radius graph would be useful. Sadly, the chance of seeing one these days appears to be close to zero.

[#12]

@jab1 

The problem is the power switch has been used SIX times since the Hub was first powered up, plus ONE GUI reboot, so seven of the radius event would just be caused by those.

I would image with a low speed uplink anything needing to use it (video calls, large file uploads, VPN sessions) will suffer.

These comments were made earlier in the thread.

[#13]

Agreed, @Dan_the_Van , part of that comment regarding radius logs was kind of driven by previous suggestions that they would have been useful being ignored.

To get back to the OPs initial issue though, it would be interesting to know what they were doing when the problem occurred, and how long they waited before 'pulling the plug', as they say the Hub light remained blue. Does this suggest a 'local' issue?

[#14]

The hub light remaining blue somewhat suggests no loss of the xDSL session, so we need to know what induced the (not always helpful) reboot of the router?

If something on the network is hammering the upload (cloud storage sync) on a not very fast link, everything else can grind to a standstill.

[#15]

@Townman 

"@jab1 ‘s use of the term “EO” is as has always been understood - the circuit goes direct from the property to the exchange frame. That is the circuit does not have both e-side and d-side legs."

Do "EO" lines go via Distribution Points, (DPs)?

.