Packet Loss after VM outage

[Kay4]

Two days ago we had one of those brief outages that took over an hour to recover from, having to factory reset modem and router. Ever since we've had packet losses, currently 16% using https://packetlosstest.com/

Is this due to whatever was going on at the time with VM, could it be an SNR, how do I get it fixed?

[Kay4]

Refresh data

Item Status TypeChannel Overview Downstream Upstream

Cable Modem Status	Online	DOCSIS 3.0
Primary downstream channel	Locked	SC-QAM
DOCSIS 3.0 channels	31	5
DOCSIS 3.1 channels	1	1

[Kay4]

3.0 Downstream channels

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

1	331000000	8.2	42	QAM 256	25
2	139000000	10.3	42	QAM 256	1
3	147000000	9.9	41	QAM 256	2
4	155000000	9.8	41	QAM 256	3
5	163000000	9.5	41	QAM 256	4
6	171000000	9.6	41	QAM 256	5
7	179000000	9.3	41	QAM 256	6
8	187000000	9.3	41	QAM 256	7
9	195000000	9.3	41	QAM 256	8
10	203000000	9.3	41	QAM 256	9
11	211000000	9.4	41	QAM 256	10
12	219000000	9.5	41	QAM 256	11
13	227000000	9.2	41	QAM 256	12
14	235000000	9.1	41	QAM 256	13
15	243000000	8.7	41	QAM 256	14
16	251000000	8.5	42	QAM 256	15
17	259000000	8.5	42	QAM 256	16
18	267000000	9	42	QAM 256	17
19	275000000	9.5	42	QAM 256	18
20	283000000	9.6	42	QAM 256	19
21	291000000	9.2	42	QAM 256	20
22	299000000	8.8	42	QAM 256	21
23	307000000	8.5	42	QAM 256	22
24	315000000	8.3	42	QAM 256	23
25	323000000	8.2	42	QAM 256	24
26	339000000	8.5	42	QAM 256	26
27	347000000	8.6	42	QAM 256	27
28	355000000	8.6	42	QAM 256	28
29	363000000	8.6	41	QAM 256	29
30	371000000	8.7	41	QAM 256	30
31	379000000	9	41	QAM 256	31

3.0 Downstream channels

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

1	Locked	42	6	13
2	Locked	42	6	36
3	Locked	41	9	31
4	Locked	41	8	29
5	Locked	41	6	28
6	Locked	41	5	23
7	Locked	41	6	18
8	Locked	41	4	17
9	Locked	41	3	14
10	Locked	41	1	16
11	Locked	41	2	15
12	Locked	41	3	14
13	Locked	41	1	16
14	Locked	41	2	14
15	Locked	41	2	15
16	Locked	42	3	14
17	Locked	42	1	15
18	Locked	42	2	15
19	Locked	42	1	15
20	Locked	42	2	14
21	Locked	42	4	14
22	Locked	42	3	14
23	Locked	42	4	13
24	Locked	42	4	13
25	Locked	42	3	14
26	Locked	42	3	15
27	Locked	42	6	13
28	Locked	42	4	13
29	Locked	41	4	14
30	Locked	41	5	13
31	Locked	41	5	13

3.1 Downstream channels

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

33

94

4K

1840

QAM 4096

1108

3.1 Downstream channels

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

33

Locked

43

8.2

453468930

0

[Kay4]

3.0 Upstream channels

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

0	49600000	38.5	5120	QAM 32	1
1	43100000	38.3	5120	QAM 32	2
2	36600000	38.5	5120	QAM 32	3
3	30100000	38.5	5120	QAM 32	4
4	23600000	38.8	5120	QAM 32	5

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

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

3.1 Upstream channels

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

6

11

33.2

2K

QAM 256

3.1 Upstream channels

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

6

OFDMA

220

74000000

0

0

[Kay4]

General Configuration

Network accessMaximum Number of CPEsBaseline PrivacyDOCSIS ModeConfig file

Allowed

1

Enabled

3.1

cmreg-vmdg660-bbt057-b.cm

Primary Downstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic Rate

38052

143750047 bps

42600bytes

0 bps

Primary Upstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling Type

38051

22000047 bps

42600bytes

0 bps

42600bytes

Best Effort

[Kay4]

Network Log

Time Priority Description

14-02-2024 18:24:00	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:23:50	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:18:47	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:18:34	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:13:31	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:13:22	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:08:19	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:08:12	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:03:09	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 18:03:00	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:57:57	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:57:44	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:52:41	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:52:38	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:47:35	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:47:28	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:45:02	warning	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:45:02	warning	Dynamic Range Window violation
14-02-2024 17:45:02	warning	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:45:02	warning	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:45:02	warning	Dynamic Range Window violation
14-02-2024 17:45:02	warning	Dynamic Range Window violation
14-02-2024 17:42:26	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 17:42:25	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14-02-2024 08:42:37	warning	RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-02-2024 21:17:30	notice	REGISTRATION COMPLETE - Waiting for Operational status
13-02-2024 21:17:26	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-02-2024 21:17:24	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-02-2024 21:17:19	notice	DS 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;
13-02-2024 21:17:15	notice	TLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-02-2024 21:17:13	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-02-2024 21:17:11	notice	Honoring MDD; IP provisioning mode = IPv4

[Client62 · Accepted solution]

The reported 16% packet loss may well be due to the choice of settings for : https://packetlosstest.com/ after all this test will record a packet as lost when it is delivered later that the chosen latency limit.

Looking at the 3.0 DOCSIS Downstream stats, Power levels are at the very high end of the spectrum, but so far errors do not appear to be a problem. If the power rises further ( dBmV > 10 )  that would be a concern.

Looking at the 3.0 DOCSIS Upstream stats, the QAM 32 on all channels indicates a local noise issue.

[Kay4]

If it is a local noise issue, can I do anything or is it just waiting to see if it improves

[Paul_DN]

Hi Kay4,

Thank you for reaching out to us in our community and welcome back, it has been quite a while, hope you have kept well, sorry to see you have been facing packet loss after an area fault, I was unable to locate you on our system with the details we have for you, so I can have a closer ;look to see if it is an area SNR issue, I have sent you an invite into a private chat, please look out for the white envelope to accept.

Regards

Paul.