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MJWMJW
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Message 11 of 45
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Re: Yet another poor speed problem

Back in the day when we used to fit network switches at work, the best way to get a Cisco engineer was to put a blown fuse in the device. The main network engineer used to keep a stock of blown fuses specially.  

Ask for for an engineer visit at least.

Not suggesting you put a blown fuse in though 😉

 

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jbrennand
Alessandro Volta
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Message 12 of 45
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Re: Yet another poor speed problem



 

If you go into the settings page and press the "reset the pre/post RS error" buttons then reboot the Hub and leave it running overnight and check the numbers again after >12 hours.  Post them back up - if its still "bad" call it in as a fault -  dont wait.

"Another thing to check for on this page is the number of post-RS errors. If damaged packets of data arrive at your router, the Reed Solomon algorithm is used to try and repair them. If that's successful, the pre-RS error counter will go up. When it fails, the post-RS error counter will go up. If your post-RS error count keeps going up it's likely a sign of an issue with your connection, so it's worth resetting the counter to 0, then checking periodically to see if the number rises. My connection has been up for about a week and the post-RS error count is 0, which is exactly what you want to see."


--------------------
Services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
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arthurhanlon
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Message 13 of 45
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Re: Yet another poor speed problem

No option to reset from what I can see but have power cycled the hub and the counters have all reset so let's see what it's looking like this evening.

Thanks again.

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arthurhanlon
On our wavelength
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Message 14 of 45
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Re: Yet another poor speed problem

I thought that it was going good but just noticed Post RS errors creeping in:

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.91420
2Locked40.32930
3Locked40.34800
4Locked40.93380
5Locked38.94740
6Locked40.37120
7Locked40.35820
8Locked40.3550
9Locked40.3290
10Locked40.9930
11Locked40.36330
12Locked40.39690
13Locked40.912760
14Locked40.916830
15Locked40.95520
16Locked40.91260
17Locked40.91780
18Locked40.35570
19Locked35.545677178
20Locked37.62749
21Locked40.92480
22Locked40.33190
23Locked40.310070
24Locked40.310740


Also, interestingly, my own monitoring is showing a marked dip in speed after I reset my modem at 10am today but this should probably be taken with a pinch of salt. Strange coincidence though.

Screenshot from 2019-01-13 17-41-17.png

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Richielee909
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Message 15 of 45
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Re: Yet another poor speed problem

I've been having exactly the same problems. I shouldn't have to be resetting my router as often as I have been. With no great effect I might add. 

I'm not as technical as I would like to be with fault logs and knowing what the problems are but the speed tests show how it's not performing as it should be for 200mb broadband.

With the increasing amount of smart devices in the home we are more reliant on a steady network. Virgin media isn't providing that. Maybe time to jump ship. 

Screenshot_20190113-202431.png

 

Screenshot_20190113-202448.png

 

Screenshot_20190113-202502.png

 

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arthurhanlon
On our wavelength
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Message 16 of 45
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Re: Yet another poor speed problem

So, quick check this morning of the router logs and I can see the Post RS errors creeping up and noted that this has started happening on more channels:

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.34040
2Locked40.320140
3Locked40.39500
4Locked40.37780
5Locked38.98590
6Locked40.313060
7Locked40.311860
8Locked40.91130
9Locked40.3860
10Locked40.93480
11Locked40.324440
12Locked40.332000
13Locked40.933530
14Locked40.352360
15Locked40.323650
16Locked40.93790
17Locked40.94140
18Locked38.922897
19Locked3556091178
20Locked37.35739
21Locked40.34440
22Locked40.98360
23Locked40.322170
24Locked40.324614524

 

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0010
4ATDMA0010

 

My Grafana dashboard still looks like the connection is somewhat unstable and hasn't really picked up after the router restart at 10am yesterday. It seems to be holding around 150mbps with a couple of 200mbps spikes in there but the regular dips are what concern me. If upload can be as stable as shown, why can't the download?

Capture.PNG

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arthurhanlon
On our wavelength
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Message 17 of 45
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Re: Yet another poor speed problem

So my work VPN just dropped connection and saw the following in the network log:

2019-01-14 11:56:29.00	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:14.00	Warning!	Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:15.00	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:31.00	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:31.00	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:35.00	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:35.00	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:36.00	Warning!	Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
2019-01-14 11:57:38.00	Warning!	RCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CM-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;

I hope it's OK to continue to update this thread with further information and I'm not just spamming?

Cheers

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jbrennand
Alessandro Volta
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Message 18 of 45
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Re: Yet another poor speed problem

Its ok - but - the VM staff members pick up these threads chronologically starting from the bottom (oldest first) of the list - so if you keep updating and we reply - it moves your thread back up the board and will take longer for them to get to it.

--------------------
Services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
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arthurhanlon
On our wavelength
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Message 19 of 45
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Re: Yet another poor speed problem

I realise this will drop this to the bottom of the queue in terms of Virgin staff getting round to it but I think it's safe to say that I need an engineer to look at this. If Post RS errors are bad then I guess my connection is pretty borked! Bear in mind the modem was only power cycled on Sunday 13th.

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1259000000140256 qam16
2419000000-0.540256 qam30
3411000000-0.240256 qam29
4403000000-0.440256 qam28
5395000000040256 qam27
63870000000.240256 qam26
7379000000040256 qam25
83230000001.240256 qam24
9315000000140256 qam23
103070000001.240256 qam22
112990000001.540256 qam21
122910000001.540256 qam20
132830000001.440256 qam19
142750000001.240256 qam18
15267000000140256 qam17
162510000001.440256 qam15
172430000001.240256 qam14
182350000001.540256 qam13
192270000001.538256 qam12
202190000001.538256 qam11
212110000001.440256 qam10
222030000001.540256 qam9
231950000001.540256 qam8
241870000001.740256 qam7



Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked40.94021409736
2Locked40.3299782564
3Locked40.9283432796
4Locked40.3290392036
5Locked40.3253913773
6Locked40.3289301858
7Locked40.3296662353
8Locked40.3336823192
9Locked40.9354213810
10Locked40.3400203571
11Locked40.9424622677
12Locked40.3397493623
13Locked40.9498654113
14Locked40.31015904890
15Locked40.31634525717
16Locked40.934002032223
17Locked40.3370108167833
18Locked40.3303261248637
19Locked38.9577812340
20Locked38.627122332
21Locked40.93415719036
22Locked40.3317460290269
23Locked40.9122806498617
24Locked40.9129602506650

 

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

15370000047.8512064 qam77
22580000046.3512064 qam76
33260000046.3512064 qam75
43940000046.8512064 qam74



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0040
2ATDMA0000
3ATDMA0010
4ATDMA0020
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arthurhanlon
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Message 20 of 45
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Re: Yet another poor speed problem

So success (of sorts).

Called the helpline and was again asked to go through the same steps as before to troubleshoot so declined and asked to speak to a manager. First attempt was put on hold and no-one picked up so called back again and asked to speak with a manager straight away. When I asked for an engineer he basically said that the network team will simply cancel an engineer if they are unable to determine why one has been booked and because THEIR systems could not detect a fault, there was nothing further that they could do.

I queried this just to confirm that I was right in thinking that if they could not detect a fault they were basically unwilling to entertain the fact that there was an issue and again he explained that they could not book an engineer without the necessary troubleshooting steps being carried out which have already been done multiple times. He maintained this for a few minutes then went to speak with his network team and lo and behold, he is all of a sudden arranging an engineer visit tomorrow between 8am and 12pm. Why the U turn?

I was also told that the Wifi on the hub was switched off, well yes it's in modem mode so that's what I would expect and when asked if I had my own router the finger was instantly pointed at that as 100% the issue which I have come to expect as a way to wriggle out of any responsibility for ongoing issues. I also have to take from the errors on the modem itself that this is an issue with the connection coming up to the modem and not past it.

All this despite him admitting that he could also see lots of Post RS errors (which again I am led to believe there should be none) and communicating what other forum members have alluded to in this forum post.

Fingers crossed that the engineer comes tomorrow and instantly sees what the issue is and can resolve it there an then for me.

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