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CM3000 Not achieving high download speeds
I purchased the CM3000 a few weeks ago when my Comcast speeds were increased to 2000 Mbps. After 2 tech visits from Comcast my speeds from the modem do not exceed 800 or so Mbps even though they tes...
What ethernet brand and model adapter do you have installed on your PC or laptop?
There a wifi router in between the modem and PC? Brand and model.
Be sure you have both ethernet adapter and a router that supports 2.5Gb or higher connection rate speeds on the ethernet ports, WAN and LAN ports for the router.
Speed test with a ethernet connected PC connected to the multi gig port on the CM modem with out the router connected.
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router
CAT#A STP cabling is recommended.
I know my computer is older and doesn't support the highest speeds.
This is the ethernet adapter model I think: Realtek PCIe GBE Family Controller.
I am using the Google Nest Wifi Pro for my routers.
Cable Diagnostic Status: Good Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.CM Status: Green Downstream Status: Green Upstream Status: Green Time Priority Description Fri Sep 13 12:57:04 2024 (Notice (6)) US profile assignment change. US Chan ID: 43; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 12:52:04 2024 (Notice (6)) US profile assignment change. US Chan ID: 43; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 12:01:08 2024 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 11:51:17 2024 (Notice (6)) DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 11:51:16 2024 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 11:51:11 2024 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Time Not Established (Notice (6)) Honoring MDD; IP provisioning mode = IPv6 Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 11:43:00 2024 (Critical (3)) Resetting the cable modem due to docsDevResetNow Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 13 03:01:35 2024 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Thu Sep 12 15:47:11 2024 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Wed Sep 11 03:01:32 2024 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Tue Sep 10 12:20:51 2024 (Critical (3)) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 06:39:34 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 06:39:05 2024 (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 06:09:41 2024 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 06:09:11 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 06:09:01 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:58:40 2024 (Critical (3)) Ranging Request Retries exhausted;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:58:40 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:57:56 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:57:46 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:46:56 2024 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:46:26 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:46:16 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:35:33 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:35:23 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:24:33 2024 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:24:03 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:23:53 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:13:30 2024 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:13:00 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:12:50 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:02:23 2024 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:01:55 2024 (Critical (3)) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:01:43 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:01:24 2024 (Critical (3)) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; Fri Sep 06 05:01:24 2024 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=e0:46:ee:91:bb:c3;CMTS-MAC=00:90:f0:2e:00:00;CM-QOS=1.1;CM-VER=3.1; If the ethernet adapter doesn't have 2.5Gbe, then thats only a 1Gb adapter. It will never much see past 900Mpbs.
If the WAN and LAN ports on the Google router system are the same 1Gb, then it won't pass thru anything much past 900Mpbs from the CM modem.
Can you post the cable connections data page with all the data down the page please.
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Cable Diagnostic Status: Good Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.CM Status: Downstream Status: Upstream Status: Advanced Information Frequency Start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency Startup Procedure
Procedure Status Comment Acquire Downstream Channel 561000000 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 561000000 Hz -3.8 dBmV 41.3 dB 0 0 2 Locked QAM256 1 399000000 Hz -2.2 dBmV 42.6 dB 0 0 3 Locked QAM256 2 405000000 Hz -2.3 dBmV 42.6 dB 0 0 4 Locked QAM256 3 411000000 Hz -2.4 dBmV 42.2 dB 0 0 5 Locked QAM256 4 417000000 Hz -2.5 dBmV 42.5 dB 0 0 6 Locked QAM256 5 423000000 Hz -2.6 dBmV 42.4 dB 0 0 7 Locked QAM256 6 429000000 Hz -2.7 dBmV 42.3 dB 0 0 8 Locked QAM256 7 435000000 Hz -2.7 dBmV 42.3 dB 0 0 9 Locked QAM256 8 441000000 Hz -2.8 dBmV 42.3 dB 0 0 10 Locked QAM256 9 447000000 Hz -2.7 dBmV 42.2 dB 0 0 11 Locked QAM256 10 453000000 Hz -2.9 dBmV 42.0 dB 0 0 12 Locked QAM256 11 459000000 Hz -2.9 dBmV 42.0 dB 0 0 13 Locked QAM256 12 465000000 Hz -2.9 dBmV 41.9 dB 0 0 14 Locked QAM256 13 471000000 Hz -2.9 dBmV 41.9 dB 0 0 15 Locked QAM256 14 477000000 Hz -2.9 dBmV 41.9 dB 0 0 16 Locked QAM256 15 483000000 Hz -3.0 dBmV 41.8 dB 0 0 17 Locked QAM256 16 489000000 Hz -3.0 dBmV 41.7 dB 0 0 18 Locked QAM256 17 495000000 Hz -3.1 dBmV 41.7 dB 0 0 19 Locked QAM256 18 501000000 Hz -3.3 dBmV 41.6 dB 0 0 20 Locked QAM256 19 507000000 Hz -3.3 dBmV 41.6 dB 0 0 21 Locked QAM256 20 513000000 Hz -3.5 dBmV 41.5 dB 0 0 22 Locked QAM256 21 519000000 Hz -3.5 dBmV 41.5 dB 0 0 23 Locked QAM256 22 525000000 Hz -3.5 dBmV 41.5 dB 0 0 24 Locked QAM256 23 531000000 Hz -3.6 dBmV 41.4 dB 0 0 25 Locked QAM256 24 537000000 Hz -3.8 dBmV 41.3 dB 0 0 26 Locked QAM256 25 543000000 Hz -3.8 dBmV 41.3 dB 0 0 27 Locked QAM256 26 549000000 Hz -3.8 dBmV 41.2 dB 0 0 28 Locked QAM256 27 555000000 Hz -3.8 dBmV 41.3 dB 0 0 29 Locked QAM256 29 567000000 Hz -3.9 dBmV 41.2 dB 0 0 30 Locked QAM256 30 573000000 Hz -3.9 dBmV 41.1 dB 0 0 31 Locked QAM256 31 579000000 Hz -4.0 dBmV 41.2 dB 0 0 32 Locked QAM256 32 585000000 Hz -4.0 dBmV 41.1 dB 0 0 Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 18 5120 Ksym/sec 22800000 Hz 40.5 dBmV 2 Locked ATDMA 17 5120 Ksym/sec 16400000 Hz 40.0 dBmV 3 Locked ATDMA 19 5120 Ksym/sec 29200000 Hz 41.0 dBmV 4 Locked ATDMA 20 5120 Ksym/sec 35600000 Hz 41.5 dBmV 5 Not Locked Unknown 0 0 0 0.0 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 Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 0 ,1 ,2 ,3 193 722000000 Hz -6.12 dBmV 39.1 dB 568 ~ 3527 54781480 53153247 0 2 Locked 0 ,1 ,2 ,3 194 957000000 Hz -8.62 dBmV 36.2 dB 148 ~ 3947 55763400 51870750 0 Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Locked 12 ,13 43 36200000 Hz 37.0 dBmV 2 Not Locked 0 0 0 Hz 0 dBmV Extended Upstream Transmit Power
Current System Time:Fri Sep 13 15:32:55 2024System Up Time:03:42:24