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Started Unicast Maintenance Ranging - No Response received - T3 time-out
My internet connection has been spotty lately.
Today I decided to check the results on ping plotter and check my cable modems logs.
Ping Plotter shows 11.4 % packet loss between me and comcasts first hop.
My cable modem's logs are full of these:
| 2023-09-17, 13:15:51 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=****;CMTS-MAC=****;CM-QOS=1.1;CM-VER=3.1; |
All my connections are tight. I don't see any corroded fittings.
Any suggestions?
Thanks
EG
Expert
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110.2K Messages
2 years ago
Please redact the CM MAC and the CMTS MAC addresses from your error log entry for your privacy. They are considered to be personal information. The posting of personally identifiable information is a violation of their forum guidelines. The forum bot will not allow your post to be seen publically. It flagged your post as "Private".
Please also copy all of the text in its entirety of the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers and paste them into your next post.
What is the exact make and model number of the modem ?
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tb1313
Contributor
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21 Messages
2 years ago
Here are my power levels:
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EG
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110.2K Messages
2 years ago
OK, please also post the balance of those error log entries in their entirety (copy and paste them, don't post a screenshot) but redact the CM MAC and the CMTS MAC addresses.
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EG
Expert
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110.2K Messages
2 years ago
OK so even though the signal status values looked OK at that snapshot in time, the error log entries confirm that something is going on. And there are a fair number of uncorrectable bit errors, but that may not be significant depending on the total uptime of the modem since the last reboot. Perhaps there is noise ingress into the line(s) / an upstream channel / return path impairment somewhere.
There are other signal stat values that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
I'm going to escalate your issue to the Comcast corporate employees (The Digital Care Team) who are available to these boards. They will be able to poll the CMTS (Cable Modem Termination System) to check for any real-time degradation and / or error reports, see your node / cable plant, and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and check those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
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EG
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110.2K Messages
2 years ago
You're very welcome !
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user_875e8b
6 Messages
2 years ago
I am experiencing a similar problem. I will lose internet connectivity and also loss of connectivity to my Netgear NightHawk CM2000 Modem via 192.168.100.1. When I check the modem lights (inconveniently located in my basement), the Upstream and Downstream Links are usually UP, but the unit has lost network connectivity.
This happened last night and then again during this afternoon's football games.
Below are my modem details:
The Netgear NightHawk CM2000 Modem is running Cable Firmware Version V8.01.02 on a <60Ft RG6 Home Run. No Splitters.
Log
Sun Sep 17 15:40:56 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 12:58:51 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 12:51:10 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 12:34:59 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 12:25:53 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:41:47 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:35:55 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:29:57 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:29:06 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:35 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:33 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:30 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:29 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:25 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:24:24 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:46 2023 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:45 2023 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:34 2023 (Notice (6)) Honoring MDD; IP provisioning mode = IPv6
Sun Sep 17 11:23:32 2023 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:22 2023 (Warning (5)) ToD request sent - No Response received;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:22 2023 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:21 2023 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:18 2023 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:18 2023 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:13 2023 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:11 2023 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:23:09 2023 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 11:22:22 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 09:15:35 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 09:13:25 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 09:13:24 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 09:12:03 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 09:11:55 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:18:05 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:22 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:19 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:17 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:16 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:12 2023 (Notice (6)) CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Sun Sep 17 07:11:11 2023 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=REDACTED;CM-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Cable Connection
Cable Diagnostic
Status: Good
CM Status: GREEN
Downstream Status: GREEN
Upstream Status: GREEN
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 573000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD IPv6 only
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 28 573000000 Hz 1.5 dBmV 43.1 dB 1511630 770199
2 Locked QAM256 1 399000000 Hz 1.6 dBmV 42.7 dB 1625218 1068938
3 Locked QAM256 2 405000000 Hz 1.6 dBmV 42.7 dB 1600546 1091710
4 Locked QAM256 3 411000000 Hz 1.8 dBmV 42.9 dB 1605595 1101504
5 Locked QAM256 4 417000000 Hz 1.8 dBmV 42.9 dB 1685083 1157854
6 Locked QAM256 5 423000000 Hz 1.6 dBmV 42.8 dB 1753268 1178191
7 Locked QAM256 6 429000000 Hz 1.5 dBmV 42.9 dB 1612812 1121154
8 Locked QAM256 7 435000000 Hz 1.6 dBmV 42.9 dB 1660660 1078943
9 Locked QAM256 8 441000000 Hz 1.6 dBmV 43.0 dB 1612212 1033747
10 Locked QAM256 9 453000000 Hz 1.7 dBmV 43.1 dB 1538546 964425
11 Locked QAM256 10 459000000 Hz 1.9 dBmV 43.2 dB 1601067 952785
12 Locked QAM256 11 465000000 Hz 1.9 dBmV 43.1 dB 1560054 954891
13 Locked QAM256 12 471000000 Hz 1.9 dBmV 43.1 dB 1481221 874387
14 Locked QAM256 13 477000000 Hz 1.9 dBmV 43.1 dB 1460535 821245
15 Locked QAM256 14 483000000 Hz 1.9 dBmV 43.2 dB 1474059 804870
16 Locked QAM256 15 489000000 Hz 1.9 dBmV 43.1 dB 1694047 894591
17 Locked QAM256 16 495000000 Hz 1.7 dBmV 43.0 dB 1404503 942505
18 Locked QAM256 17 507000000 Hz 1.6 dBmV 43.1 dB 1511742 744053
19 Locked QAM256 18 513000000 Hz 1.3 dBmV 43.1 dB 1430394 772453
20 Locked QAM256 19 519000000 Hz 1.3 dBmV 43.1 dB 1384636 690704
21 Locked QAM256 20 525000000 Hz 1.4 dBmV 43.1 dB 1494968 752961
22 Locked QAM256 21 531000000 Hz 1.1 dBmV 43.0 dB 1445211 821778
23 Locked QAM256 22 537000000 Hz 1.1 dBmV 43.0 dB 1500190 762739
24 Locked QAM256 23 543000000 Hz 1.2 dBmV 43.0 dB 1357374 749529
25 Locked QAM256 24 549000000 Hz 1.3 dBmV 43.1 dB 1437782 726700
26 Locked QAM256 25 555000000 Hz 1.2 dBmV 43.0 dB 1382580 724547
27 Locked QAM256 26 561000000 Hz 1.4 dBmV 43.1 dB 1301408 642516
28 Locked QAM256 27 567000000 Hz 1.5 dBmV 43.1 dB 1338342 640028
29 Locked QAM256 29 579000000 Hz 1.5 dBmV 43.1 dB 1348732 616784
30 Locked QAM256 30 585000000 Hz 1.5 dBmV 43.1 dB 1227355 520609
31 Locked QAM256 31 591000000 Hz 1.6 dBmV 43.1 dB 1231346 559974
32 Locked QAM256 32 597000000 Hz 1.7 dBmV 43.2 dB 1213161 514284
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 35600000 Hz 47.0 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 47.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 46.8 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 46.5 dBmV
5 Locked ATDMA 5 1280 Ksym/sec 39600000 Hz 41.8 dBmV
6 Not Locked Unknown 0 0 0 0.0 dBmV
7 Not Locked Unknown 0 0 0 0.0 dBmV
8 Not Locked Unknown 0 0 0 0.0 dBmV
Downstream OFDM Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Current System Time: Sun Sep 17 15:44:17 2023
System Up Time: 19 days 00:39:26
Any suggestions would be appreciated.
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tb1313
Contributor
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21 Messages
2 years ago
getting worse tonight
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tb1313
Contributor
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21 Messages
2 years ago
Tech coming tomorrow. thanks again to EG and the Digital Care Team. Hopeful this gets sorted out.
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tb1313
Contributor
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21 Messages
2 years ago
Things were better until tonight. Now my connection is awful again.
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tb1313
Contributor
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21 Messages
2 years ago
Same errors in the modem log
Started Unicast Maintenance Ranging - No Response received - T3 time-out
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EG
Expert
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110.2K Messages
2 years ago
@tb1313
Your post with that pic of the speed test was marked as being "Private" by the forum software because it contains your public IP address. That is considered to be personal information. The posting of personally identifiable information is a violation of their forum guidelines. Please blot out the address or delete the pic altogether. The forum bot will not allow your post to be seen publically.
(edited)
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tb1313
Contributor
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21 Messages
2 years ago
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