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fatedsnowfox's avatar
fatedsnowfox
Dialled in
4 days ago

High packet loss, Area 12

In the B37 6 area of Birmingham, I've been getting high packet loss warnings from about 1520 continuously.  The amount is ranging between 19-21% and is causing my router to switch to its fallback connection.  There's nothing in the router log to suggest anything amiss, except for dozens upon dozens of profile changes: 

Time	Priority	Description
31-08-2025 17:01:29	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
31-08-2025 15:57:41	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
30-08-2025 16:33:51	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
30-08-2025 15:30:02	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
30-08-2025 00:36:46	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
29-08-2025 23:32:57	notice	US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;
26-08-2025 01:11:33	error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=8c:9a:8f:13:39:4d;CMTS-MAC=00:01:5c:85:c8:70;CM-QOS=1.1;CM-VER=3.1;

Voltages seem pretty much in order:

3.1 Downstream channels
Channel ID	Locked Status	RxMER Data (dB)	PLC Power (dBmV)	Corrected errors (Active Profile)	Uncorrectable errors (Active Profile)
33	Locked	41	6.3	2162417368	63
3.1 Upstream channels
Channel	Channel Width (MHz)	Power (dBmV)	FFT Type	Modulation
6	10.4	30.5	2K	QAM 256

3.1 Upstream channels
Channel	Channel Type	Number of Active Subcarriers	First Active Subcarrier (Hz)	T3 Timeouts	T4 Timeouts
6	OFDMA	208	74000000	36	0

Other useful information:  

Earlier this year we had a new cable pulled from the headend because we're right on the threshhold for gigabit+ service, and needed the higher spec coax.  We'd been having consistent connection bounces before that.  

Approx 2 months ago we had to replace the Hub5 because it completely failed - dead, no power, no response.  

Any thoughts anyone? 

area 12
birmingham
packet loss
packetloss
profile change

3 Replies

    • fatedsnowfox's avatar
      fatedsnowfox
      Dialled in
      4 days ago

      Hi! 

      No, it's all pretty much within what I'd expect to see

      3.0 Downstream channels
Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	139000000	12.8	38	QAM 256	1
2	147000000	12.6	38	QAM 256	2
3	155000000	12.3	38	QAM 256	3
4	163000000	12	39	QAM 256	4
5	171000000	11.6	39	QAM 256	5
6	179000000	11.4	39	QAM 256	6
7	187000000	11.3	39	QAM 256	7
8	195000000	11.3	39	QAM 256	8
9	203000000	11.3	39	QAM 256	9
10	211000000	11.3	39	QAM 256	10
11	219000000	11	39	QAM 256	11
12	227000000	10.6	39	QAM 256	12
13	235000000	10.2	39	QAM 256	13
14	243000000	10.5	39	QAM 256	14
15	251000000	10.4	39	QAM 256	15
16	259000000	10.2	39	QAM 256	16
17	267000000	10.1	39	QAM 256	17
18	275000000	9.9	39	QAM 256	18
19	283000000	10.1	39	QAM 256	19
20	291000000	10.1	39	QAM 256	20
21	299000000	9.7	39	QAM 256	21
22	307000000	9.5	39	QAM 256	22
23	315000000	9.5	39	QAM 256	23
24	323000000	9.7	39	QAM 256	24
25	331000000	9.3	39	QAM 256	25
26	339000000	9.1	39	QAM 256	26
27	347000000	9.1	39	QAM 256	27
28	355000000	9.5	39	QAM 256	28
29	363000000	9.6	40	QAM 256	29
30	371000000	9.2	39	QAM 256	30
31	379000000	9.2	40	QAM 256	31

3.0 Downstream channels
Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	38	584	0
2	Locked	38	594	0
3	Locked	38	635	0
4	Locked	39	575	0
5	Locked	39	549	0
6	Locked	39	541	0
7	Locked	39	554	0
8	Locked	39	535	0
9	Locked	39	498	0
10	Locked	39	515	0
11	Locked	39	518	0
12	Locked	39	542	5
13	Locked	39	534	0
14	Locked	39	540	1
15	Locked	39	515	0
16	Locked	39	456	0
17	Locked	39	499	0
18	Locked	39	513	0
19	Locked	39	439	0
20	Locked	39	470	0
21	Locked	39	473	0
22	Locked	39	472	0
23	Locked	39	487	0
24	Locked	39	509	0
25	Locked	39	496	0
26	Locked	39	564	0
27	Locked	39	537	7
28	Locked	39	486	0
29	Locked	40	445	0
30	Locked	39	491	1
31	Locked	40	453	0
      3.0 Upstream channels
Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
0	49600000	35.3	5120	QAM 64	1
1	43100000	35.3	5120	QAM 64	2
2	36600000	35.5	5120	QAM 64	3
3	30100000	35.8	5120	QAM 64	4
4	23600000	36	5120	QAM 64	5

3.0 Upstream channels
Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
0	ATDMA	0	0	9	0
1	ATDMA	0	0	1	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

      This started without warning today and was pretty much solid from 1530 to 1800, then it stopped.  It's possible it's the beginnings of an area fault, but the system is showing green and the automated checks all passed.  

      • Robert_P's avatar
        Robert_P
        Icon for Forum Team rankForum Team
        24 hours ago

        Hello fatedsnowfox

         

        Sorry to hear of the connection issues, we appreciate you raising this and providing us with all of the information.

         

        From checking there looks to be issues with the power levels across your downstream channels which will require a visit. I will send you a Private Message, please keep an eye out in the top right when signed into the forums for the envelope. This is where you will be able to find my Private Message and be able to respond.