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Packet Loss

parmi
On our wavelength

A few days ago I started to have high packet loss, I have always noticed packet loss with Virgin Media, but lately it has become too high.

I'm using the Hub 5 in modem mode to which I connected a NanoPi R6S (8core@2.4GHz - 8GB RAM) to the 2.5Gbps port, configured to use SQM/fq_codel and DSCP packet (inbound and outbound), tested with Wireshark to double check and it works.

Obviously I have already tried restarting the modem and rouer.

The game packets are of UDP type, I'm playing Valorant which reports a high number of lost packets (2/3 packets every second), and I have the same problem with my multistream on Twitch and YouTube where I lose 40% of frames, packet loss is present even when I'm not streaming.

My upload speed test is lower than usual (90Mbps)

parmi_0-1717946206877.png

 

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13310000006.541QAM 25625
21390000006.541QAM 2561
31470000006.341QAM 2562
41550000006.341QAM 2563
51630000006.341QAM 2564
61710000006.141QAM 2565
71790000006.341QAM 2566
81870000006.342QAM 2567
91950000006.541QAM 2568
102030000005.741QAM 2569
112110000003.740QAM 25610
12219000000641QAM 25611
132270000006.241QAM 25612
142350000006.341QAM 25613
15243000000641QAM 25614
162510000006.141QAM 25615
172590000006.141QAM 25616
182670000006.241QAM 25617
192750000006.341QAM 25618
202830000006.241QAM 25619
212910000006.541QAM 25620
222990000006.541QAM 25621
233070000006.741QAM 25622
243150000006.842QAM 25623
253230000006.641QAM 25624
263390000006.341QAM 25626
273470000006.441QAM 25627
283550000006.241QAM 25628
293630000006.541QAM 25629
303710000006.741QAM 25630
313790000006.741QAM 25631
323870000006.842QAM 25632

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked4100
2Locked4100
3Locked4100
4Locked4100
5Locked4100
6Locked4100
7Locked4100
8Locked4200
9Locked4100
10Locked4100
11Locked4000
12Locked4100
13Locked4100
14Locked4100
15Locked4100
16Locked4100
17Locked4100
18Locked4100
19Locked4100
20Locked4100
21Locked4100
22Locked4100
23Locked4100
24Locked4200
25Locked4100
26Locked4100
27Locked4100
28Locked4100
29Locked4100
30Locked4100
31Locked4100
32Locked4200

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159944K1840QAM 40961108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
159Locked427.5126936550

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
04960000037.35120QAM 649
14310000037.35120QAM 6410
23660000036.85120QAM 6411
33010000036.35120QAM 6412
423600000375120QAM 6413

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0ATDMA0310
1ATDMA0300
2ATDMA0310
3ATDMA0300
4ATDMA03180

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
141031.02KQAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
14OFDMA2007400000000
 
15 REPLIES 15

parmi
On our wavelength

Network Log

Time Priority Description
09-06-2024 16:02:31noticeGUI Login Status - Login Success from LAN interface
09-06-2024 15:45:56noticeGUI Login Status - Login Success from LAN interface
09-06-2024 15:43:42criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:36:04warningDBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:36:04noticeUS profile assignment change. US Chan ID: 14; Previous Profile: 12 13; New Profile: 13.;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:35:40noticeUS profile assignment change. US Chan ID: 14; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:35:40warningDBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:56warningTCS Partial Service;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:56criticalUnicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:39criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:37warningDBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:37noticeUS profile assignment change. US Chan ID: 14; Previous Profile: 13; New Profile: 11 13.;CM-MAC=--:--:--:--:--:74;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:34warningTCS Partial Service;CM-MAC=--:--:--:--:--:74;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:34criticalNo Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:34noticeREGISTRATION COMPLETE - Waiting for Operational status
09-06-2024 15:34:24warningREG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:19noticeDS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:15noticeTLV-11 - unrecognized OID;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:-;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:13warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=--:--:--:--:--:-;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:34:11noticeHonoring MDD; IP provisioning mode = IPv4
09-06-2024 15:34:08criticalNo Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:33:43criticalNo Ranging Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:33:39criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=--:--:--:--:--:--;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-06-2024 15:33:38criticalCable Modem Reboot because of - HW or Power-On Reset
08-06-2024 23:09:33criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
08-06-2024 12:20:13criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
07-06-2024 08:05:58criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
06-06-2024 20:49:23criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
06-06-2024 04:52:15criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
01-06-2024 07:24:15criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 23:44:24criticalNo Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=--:--:--:--:--:--;CMTS-MAC=--:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 23:43:49criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=--:--:--:--:--:--;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
31-05-2024 23:43:48criticalCable Modem Reboot because of - HW or Power-On Reset
20-05-2024 19:46:27criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=--:---:--:--:--:--;CMTS-MAC=00:--:--:--:--:--;CM-QOS=1.1;CM-VER=3.1;

parmi
On our wavelength

Anyone can help me?

Client62
Legend

The stats in this thread don't cover packet loss on the video streaming applications in question.

parmi
On our wavelength

What do you mean? what stats do you need?

jpeg1
Alessandro Volta

https://www.thinkbroadband.com/broadband/monitoring/quality

Post a link here to the live display. 

- jpeg1
My name is NOT Alessandro. That's just a tag Virginmedia sticks on some contributors. Please ignore it.

parmi
On our wavelength

I just created a new account on thinkbroadband, I'm already starting to see that there are packet losses.

My Broadband Ping - VirginMedia 

parmi
On our wavelength

Anyone have any idea what's going on?

jpeg1
Alessandro Volta

That illustrates your reported problem pretty well. How do those red periods coincide with your heavy use? Are there other times that are OK for you when you are streaming? 

- jpeg1
My name is NOT Alessandro. That's just a tag Virginmedia sticks on some contributors. Please ignore it.

parmi
On our wavelength

Basically from the tests I have done, I can conclude that during the red periods I notice the following things:

  • Packet loss in game from 1 to 7 packet losses per second, also according to the graphics and statistics of the game the packet loss is only in upload, the download is ok, the game sends about 1KB/s of UDP data.
  • The upload speed test drops from 90Mbps to 45Mbps, the download does not suffer any drop.
  • My multistream to Twitch and YouTube suffers framedrops of around 40% (data reported by OBS), the streaming is set at a bitrate of 8000kbps, so I have an upload of around 16Mbps data, the in-game packet losses occur even if I stop the streams.

There is no one else in the house using the connection during the red periods.

During the non-red periods, none of the above problems occur.

This problem started happening a few days ago, I've never had any problems like this before.