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ToffeeSurprise
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Packet Loss Area 12

Thankfully this doesn't impact me in any way, but I am still under contract and I'm sure my neighbours will be grateful for raising any network fault.


Pretty graphs ahead

17th

Packet Loss 17-04-21.jpg

18th

Packet Loss 18-04-21.jpg

Live BQM
https://www.thinkbroadband.com/broadband/monitoring/quality/share/5c2c011b662954e05bf386e5231c0c3e67...

Router stats and all that good stuff.

Cable Modem StatusItem Status CommentsChannel Overview Downstream Upstream
Cable Modem Status
Online
DOCSIS 3.1
Primary downstream channel
Locked
SC-QAM
DOCSIS 3.0 channels
31
4
DOCSIS 3.1 channels
1
0

 

3.0 Downstream channels

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

3155000000-2.337.4QAM2563
1139000000-1.637.4QAM2561
2147000000-2.337.4QAM2562
4163000000-2.437.4QAM2564
5171000000-2.737.4QAM2565
6179000000-337.4QAM2566
7187000000-3.337.4QAM2567
8195000000-3.637.4QAM2568
9203000000-3.636.6QAM2569
10211000000-3.836.6QAM25610
11219000000-3.837.4QAM25611
12227000000-3.936.6QAM25612
13235000000-3.936.4QAM25613
14243000000-436.6QAM25614
15251000000-4.336.4QAM25615
16259000000-4.136.6QAM25616
17267000000-4.436.4QAM25617
18275000000-5.436.4QAM25618
19283000000-5.836.6QAM25619
20291000000-5.536.4QAM25620
21299000000-436.4QAM25621
22307000000-2.736.6QAM25622
23315000000-2.537.4QAM25623
24323000000-2.536.6QAM25624
25363000000-2.537.4QAM25625
26371000000-2.136.4QAM25626
27379000000-1.936.6QAM25627
28387000000-1.736.6QAM25628
29395000000-1.737.4QAM25629
30403000000-1.937.6QAM25630
31411000000-1.837.4QAM25631



 

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ToffeeSurprise
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Re: Packet Loss Area 12

3.0 Downstream channels

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

3Locked37.35598800
1Locked37.35598800
2Locked37.35598800
4Locked37.35598800
5Locked37.35598800
6Locked37.35598800
7Locked37.35598800
8Locked37.35598800
9Locked36.60965300
10Locked36.60965300
11Locked37.35598800
12Locked36.60965300
13Locked36.38689000
14Locked36.60965300
15Locked36.38689000
16Locked36.60965300
17Locked36.38689000
18Locked36.38689000
19Locked36.60965300
20Locked36.38689000
21Locked36.38689000
22Locked36.60965300
23Locked37.35598800
24Locked36.60965300
25Locked37.35598800
26Locked36.38689000
27Locked36.60965300
28Locked36.60965300
29Locked37.35598800
30Locked37.63627600
31Locked37.35598800

 

3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159964K1880QAM4096759


3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
159Locked37-2.426804510

 

3.0 Upstream channels

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

132600000365120 KSym/sec64QAM5
22580000035.35120 KSym/sec64QAM6
33940000036.55120 KSym/sec64QAM4
446200000375120 KSym/sec64QAM3



3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1US_TYPE_STDMA0000
2US_TYPE_STDMA0010
3US_TYPE_STDMA0000
4US_TYPE_STDMA0000

 

General Configuration

Network access
true
Maximum Number of CPEs
1
Baseline Privacy
true
DOCSIS Mode
3.1
Config file
54k;fg87dsfd;kfoA,.iyewrk



Primary Downstream Service Flow

SFID
18163
Max Traffic Rate
1200000450
Max Traffic Burst
42600
Min Traffic Rate
0



Primary Upstream Service Flow

SFID
18162
Max Traffic Rate
55000270
Max Traffic Burst
42600
Min Traffic Rate
0
Max Concatenated Burst
16320
Scheduling Type
bestEffort

 

 

Network logs: No entries since 16/03.

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ToffeeSurprise
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Re: Packet Loss Area 12

I assume VM staff can see edit history, as I no longer use my VM connection I will provide the account details then edit them out.

Current IP address: EDITED

Account number: EDITED

Area 12

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ToffeeSurprise
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Re: Packet Loss Area 12

8856e94b6238deb21e6553e650fd0b9e43f6c533-18-04-2021

a8ba0e914cffd92e72cb08dfc6ba26373b4fa7c8-17-04-2021

Wonderful packet loss.

So aside from a reduction in SNR which usually sits around 38-39 dB as memory serves, there's been a drop in power levels across the middle downstream channels. These would normally sit around -1 to -2 dBm since I am very close to the cabinet and on a 10 dB attenuator. There definitely seems to be a considerable drop in power from around the 187MHz - 363MHz band, though normal on the lower and upper downstream channels.

Modulation is clearly fine since upstream is still at 64QAM, and the 3.1 downstream is still at 4096QAM.

Cabling is finger tight and in excellent condition. I would say this is almost certainly a network fault.

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Adduxi
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Message 5 of 9
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Re: Packet Loss Area 12

Some of your DS levels are very close to the lower spec of -6.  Can you swap the 10db FPA to 6 perhaps, as that would up the lower levels to around -1.

Don't think it will help the packet loss, but will improve the signal.

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ToffeeSurprise
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Message 6 of 9
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Re: Packet Loss Area 12

I don't have another attenuator just the 10dB one, I'm pretty sure I heard some Virgin Media guys working outside a few hours ago (joys of shift work), and my BQM has been clear for a few hours, so suspect they've fixed some fault.

Power levels are still low, but currently getting the full 1Gbps and the SNR itself is high enough.

As long as the network is clear, I don't really care. But not everyone in my street is a network engineer constantly monitoring their own connection.

Cheers in any case.

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Molly_G
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Re: Packet Loss Area 12

Hi @ToffeeSurprise,

 

Thanks for getting in touch regarding the packet loss you've picked up on.

Unfortunately we are unable to uncover the edit history on your previous posts to check whether this is a known fault for your exact location. 

Are you able to confirm if any updates have been given by our Service Status page? If not, feel free to drop me a private message with your post code and I can look further into this for you.

 

Many thanks,

Molly_G
Forum Team



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ToffeeSurprise
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Re: Packet Loss Area 12

Hi Molly, thanks for the response.

The graph is still clear so does look like the networks team have resolved the fault, and no further action is needed.

Thanks again.

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Molly_G
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Re: Packet Loss Area 12

Hi @ToffeeSurprise,

 

No worries at all - thanks for the update, that's great news. 

 

Thanks,

Molly_G
Forum Team



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