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CM2000 Connection Speeds drop drastically

KnightroUCF
Aspirant
Aspirant
‎2022-12-19 09:12 AM
‎2022-12-19 09:12 AM

CM2000 Connection Speeds drop drastically

Basic details: RCN Gig Internet, hard-wired ethernet to the computer, usually can start out getting ~600Mbps Download & ~25Mbps Upload.  After a few minutes, it drops to ~35Mbps download & ~.1Mbps upload.  A reset sometimes will work, other times it takes a few resets to get it to get back up to normal, only for the same thing to happen.  Not that it matters since this is over a hardwired connection, but connected router is an eero Pro.

 

Event Log:

TimePriorityDescription
Mon Dec 19 16:55:56 2022(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:50:44 2022(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:44:28 2022(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:44:10 2022(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:43:17 2022(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:39:53 2022(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:39:28 2022(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:37:42 2022(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:20 2022(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:09 2022(Warning (5))REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:06 2022(Notice (6))DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Notice (6))TLV-11 - unrecognized OID;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.7;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.6;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.5;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.4;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.3;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.2;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:05 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.1;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:33:03 2022(Warning (5))DHCP WARNING - Non-critical field invalid in response ;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:32:59 2022(Notice (6))Honoring MDD; IP provisioning mode = IPv4
Mon Dec 19 16:32:37 2022(Critical (3))Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:50 2022(Warning (5))REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:48 2022(Notice (6))DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:47 2022(Critical (3))SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Notice (6))TLV-11 - unrecognized OID;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.7;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.6;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.5;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.4;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.3;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.2;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:42 2022(Error (4))Missing BP Configuration Setting TLV Type: 17.1;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 19 16:31:40 2022(Warning (5))DHCP WARNING - Non-critical field invalid in response ;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:cc:fc:61:d5:5b;CM-QOS=1.1;CM-VER=3.1;
Time Not Established(Notice (6))Honoring MDD; IP provisioning mode = IPv4
Time Not Established(Critical (3))SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:9e:43:e9:e6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

 

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KnightroUCF
Aspirant
Aspirant
‎2022-12-19 09:13 AM
‎2022-12-19 09:13 AM

Re: CM2000 Connection Speeds drop drastically

Additional Information:

 

Downstream Bonded Channels:

ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25615603000000 Hz10.3 dBmV38.5 dB00
2LockedQAM2561519000000 Hz10.4 dBmV38.9 dB00
3LockedQAM2562525000000 Hz10.0 dBmV38.8 dB00
4LockedQAM2563531000000 Hz9.9 dBmV38.6 dB00
5LockedQAM2564537000000 Hz9.9 dBmV38.6 dB00
6LockedQAM2565543000000 Hz9.8 dBmV38.6 dB00
7LockedQAM2566549000000 Hz9.6 dBmV38.5 dB00
8LockedQAM2567555000000 Hz9.7 dBmV38.5 dB00
9LockedQAM2568561000000 Hz9.8 dBmV37.8 dB00
10LockedQAM2569567000000 Hz9.8 dBmV38.6 dB00
11LockedQAM25610573000000 Hz9.9 dBmV38.3 dB00
12LockedQAM25611579000000 Hz10.1 dBmV38.6 dB00
13LockedQAM25612585000000 Hz10.1 dBmV38.6 dB00
14LockedQAM25613591000000 Hz10.3 dBmV38.6 dB00
15LockedQAM25614597000000 Hz10.5 dBmV38.5 dB00
16LockedQAM25616609000000 Hz10.3 dBmV38.5 dB00
17LockedQAM25617495000000 Hz10.7 dBmV39.0 dB00
18LockedQAM25618501000000 Hz10.6 dBmV39.0 dB00
19LockedQAM25619507000000 Hz10.4 dBmV38.8 dB00
20LockedQAM25620513000000 Hz10.4 dBmV38.8 dB00
21Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
22Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
23Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
24Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
25Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
26Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
27Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
28Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
29Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
30Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
31Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00

 

Upstream Bonded Channels:

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA1512036800000 Hz43.8 dBmV
2LockedATDMA2512030350000 Hz43.8 dBmV
3LockedATDMA3512023900000 Hz44.0 dBmV
4Not LockedUnknown000 Hz0.0 dBmV
5Not LockedUnknown000 Hz0.0 dBmV
6Not LockedUnknown000 Hz0.0 dBmV
7Not LockedUnknown000 Hz0.0 dBmV
8Not LockedUnknown000 Hz0.0 dBmV

 

Extended Upstream Transmit Power - unchecked

 

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FURRYe38
Guru Guru
Guru
‎2022-12-19 09:14 AM
‎2022-12-19 09:14 AM

Re: CM2000 Connection Speeds drop drastically

Lots of Errors and Criticals that the ISP needs to review and resolve.

 

Power is too high on the line as well:

https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router

 

 

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...

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