Packet Loss / Lag Spikes

[NoxiousDevil]

Hello,

Hoping some folks can shed some light as to why I'm getting frequent packet loss with Virgin. My broadband speed is 1Gig - superhub 4 connected in modem mode with an Asus Tuf AX5400 router (via ethernet). Have tried factory resetting both the superhub and the Asus router as well as running the superhub in normal mode but still no luck for me 😞 

Edit!! I have also noticed in my logs im getting quite a few Event type code 24 errors as well

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

25	331000000	9.3	39	QAM256	25
1	139000000	10.3	38.6	QAM256	1
2	147000000	10	38.6	QAM256	2
3	155000000	9.9	40.4	QAM256	3
4	163000000	9.8	39	QAM256	4
5	171000000	9.6	39	QAM256	5
6	179000000	9.9	40.4	QAM256	6
7	187000000	10	40.4	QAM256	7
8	195000000	9.8	40.4	QAM256	8
9	203000000	9.5	40.4	QAM256	9
10	211000000	9.1	40.4	QAM256	10
11	219000000	8.7	39	QAM256	11
12	227000000	8.6	39	QAM256	12
13	235000000	8.4	38.6	QAM256	13
14	243000000	8.2	39	QAM256	14
15	251000000	8	39	QAM256	15
16	259000000	8.5	39	QAM256	16
17	267000000	8.6	39	QAM256	17
18	275000000	9	39	QAM256	18
19	283000000	9.3	39	QAM256	19
20	291000000	10	39	QAM256	20
21	299000000	10.9	39	QAM256	21
22	307000000	11.1	39	QAM256	22
23	315000000	10.7	39	QAM256	23
24	323000000	9.7	39	QAM256	24
26	339000000	9.5	39	QAM256	26
27	347000000	10.2	40.4	QAM256	27
28	355000000	10.4	39	QAM256	28
29	363000000	10.5	39	QAM256	29
30	371000000	10.2	39	QAM256	30
31	379000000	9.8	38.6	QAM256	31

3.0 Downstream channels

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

25	Locked	38.983261	0	0
1	Locked	38.605377	0	0
2	Locked	38.605377	0	0
3	Locked	40.366287	0	0
4	Locked	38.983261	0	0
5	Locked	38.983261	0	0
6	Locked	40.366287	0	0
7	Locked	40.366287	0	0
8	Locked	40.366287	0	0
9	Locked	40.366287	0	0
10	Locked	40.366287	0	0
11	Locked	38.983261	0	0
12	Locked	38.983261	0	0
13	Locked	38.605377	0	0
14	Locked	38.983261	0	0
15	Locked	38.983261	0	0
16	Locked	38.983261	0	0
17	Locked	38.983261	0	0
18	Locked	38.983261	0	0
19	Locked	38.983261	0	0
20	Locked	38.983261	0	0
21	Locked	38.983261	0	0
22	Locked	38.983261	0	0
23	Locked	38.983261	0	0
24	Locked	38.983261	0	0
26	Locked	38.983261	0	0
27	Locked	40.366287	0	0
28	Locked	38.983261	0	0
29	Locked	38.983261	0	0
30	Locked	38.983261	0	0
31	Locked	38.605377	0	0

3.1 Downstream channels

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

159

96

4K

1840

QAM4096

759

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

41

7.6

91184254

39

[NoxiousDevil]

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

1	36600000	39.5	5120 KSym/sec	QAM64	11
2	23600000	39	5120 KSym/sec	QAM64	13
3	30100000	39	5120 KSym/sec	QAM64	12
4	43100000	40	5120 KSym/sec	QAM64	10
5	49600000	40.3	5120 KSym/sec	QAM64	9

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0
5	ATDMA	0	0	0	0

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation

14

10.0

36.5

2K

QAM32

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts

14

OFDMA

200

53.9

0

0

[NoxiousDevil]

Wed 03/05/2023 20:40:50	6	US profile assignment change. US Chan ID: 14; Previous Profile: 11; New Profile: 12.;CM-MAC=;CMTS-MAC=CM-QOS=1.1;CM-VER=3.1;
Wed 03/05/2023 20:33:31	6	CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC= CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

[legacy1]

setup a BQM

Broadband Quality Monitor | thinkbroadband

run a CMD

ping -t 194.168.4.100

press CTRL + pause to get updates

[Adduxi]

Your Downstream power levels are too high on some channels.  They should be between -6 and +10, ideally closer to 0.  If the Upstream channels are constantly changing profiles, that's not ideal either.   

You need to get a VM technician to lower the power levels to the Hub.

[NoxiousDevil]

I had a feeling they were too high, I've also noticed the upstream 3.1 QAM keeps changing quite frequently, upon rebooting the hub 4 it goes to 128QAM then 5 mins later drops to 32QAM. This results in games producing high ping spikes sometimes up to 500ms for a few seconds then goes back to normal 30ms.

Edit: just checked on superhub and the upstream 3.1 qam is now QAM8!

[NoxiousDevil]

I set up a bqm as you requested and here are the results as of yet! Obvious signs of issues

[Client62]

The DS 3.1 Channel looks quite suspect, over 91 Million Pre RS errors are logged but by only 39 Post RS errors.

Either the error correction is Absolutely Fabulous or more plausible, Post RS errors are grossly under reported.

[NoxiousDevil]

Had loads of disconnections today, thankfully went onto live chat and they're sending a technician round this Saturday to sort the power levels and other issues I have had 🙂