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Forum Discussion
CM1200 Speed, firmware
Hi, Just activated CM1200 on Xfinity. I have 600MB download speed plan. 2 questions 1. Comcast told me since I did not rent the Cable modem from them, they don't update the firmware. I have to ask ...
Metasharma, you should automatically receive the latest CM1200 firmware (V2.02.05) from Comcast when you reboot the modem.
Netgear support is horrible. Now that that is out the way. Here is the real issue.
Cable Modem = CM1200
Router = RAX200
Cable Modem is connected to Router in network aggregated connected to give a maximum speed of 2000 Gpbs.
Xfinity ISP has me connected up as 1.2Gbps. I was running fine for the past 6 months with a network speed of ~1.2 Gpbs using the Nighthawk app on my iphone connected to the router.
At the turn of the year, Xfinity has new pricing plans and service and moves me to it without my knowledge. Great Business Ethics Xfinity. Also at the same time, my network speed drops to 600 Mbps. It has been like that for the past 3 weeks. I call Xfinity and they say I am still connected at 1.2 Gbps. They do some tests and suggest I call Netgear. Netgear goes through their idiot checks and automatically say it is something on my network causing the issue and wants to charge me $44 to have a look further. Nothing has changed on my network.
So, I go with my own debugging. I disconnect my wire devices to the router and turn off all of my wifi devices. I do a power cycle of the CM1200 modem along with a power cycle of the RAX200 router. Run the Nighthawk speed test and still get 600 Mbps.
So which company is the BS artist. Xfinity with their bait and switch connection service. Or Netgear? I bet if I get a lawyer involved I would get prompt resolution.
Would be and ISP issue if and when they changed somenthing.
Post a copy and paste of the modems connection status page here in the forums.
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.
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853Ask the ISP to ensure the modems FW is up to date:
FYI, as per DOCSIS specs, it's up to ALL cable ISP to update modem FW. Users are not allowed this. Some ISP will not update user owned modems.
JoeMor wrote:Netgear support is horrible. Now that that is out the way. Here is the real issue.
Cable Modem = CM1200
Router = RAX200
Cable Modem is connected to Router in network aggregated connected to give a maximum speed of 2000 Gpbs.
Xfinity ISP has me connected up as 1.2Gbps. I was running fine for the past 6 months with a network speed of ~1.2 Gpbs using the Nighthawk app on my iphone connected to the router.
At the turn of the year, Xfinity has new pricing plans and service and moves me to it without my knowledge. Great Business Ethics Xfinity. Also at the same time, my network speed drops to 600 Mbps. It has been like that for the past 3 weeks. I call Xfinity and they say I am still connected at 1.2 Gbps. They do some tests and suggest I call Netgear. Netgear goes through their idiot checks and automatically say it is something on my network causing the issue and wants to charge me $44 to have a look further. Nothing has changed on my network.
So, I go with my own debugging. I disconnect my wire devices to the router and turn off all of my wifi devices. I do a power cycle of the CM1200 modem along with a power cycle of the RAX200 router. Run the Nighthawk speed test and still get 600 Mbps.
So which company is the BS artist. Xfinity with their bait and switch connection service. Or Netgear? I bet if I get a lawyer involved I would get prompt resolution.
Coax Cable Provided by Comcast Xfinity service. The cable wasn't an issue before. No coax splitter is being used now. I was using a splitter before and was receiving the 1.2 Gbps speed before I dropped the TV service and went to streaming with another provider. I also checked and made sure CM1200 was loaded with the latest firmware (V3.02.01). Lastly, I tried saving off my settings updating the RAX200 to the latest firmware update and then applying my saved settings back. No luck.
CM1200 Event Log
Sun Jan 31 14:05:16 2021 Warning (5) Dynamic Range Window violation Sun Jan 31 14:05:16 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sun Jan 31 10:51:34 2021 Warning (5) Dynamic Range Window violation Sun Jan 31 10:51:34 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sat Jan 30 22:04:08 2021 Warning (5) Dynamic Range Window violation Sat Jan 30 22:04:08 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Fri Jan 29 10:01:56 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 19:55:16 2021 Warning (5) Dynamic Range Window violation Wed Jan 27 19:55:16 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 19:54:44 2021 Notice (6) CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: �; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 19:54:41 2021 Warning (5) Unicast DSID PSN startup error Wed Jan 27 19:54:24 2021 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 19:54:15 2021 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 19:54:05 2021 Notice (6) TLV-11 - unrecognized OID;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;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=08:36:c9:41:34:58;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 18:55:18 2021 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 18:55:08 2021 Notice (6) TLV-11 - unrecognized OID;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;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=08:36:c9:41:34:58;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 18:53:43 2021 Critical (3) Resetting the cable modem due to docsDevResetNow Wed Jan 27 18:50:32 2021 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 18:50:24 2021 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 18:50:14 2021 Notice (6) TLV-11 - unrecognized OID;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;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=08:36:c9:41:34:58;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; Wed Jan 27 15:58:05 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Mon Jan 25 21:06:52 2021 Warning (5) Dynamic Range Window violation Mon Jan 25 21:06:52 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Mon Jan 25 20:16:37 2021 Warning (5) Dynamic Range Window violation Mon Jan 25 20:16:37 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Mon Jan 25 18:57:05 2021 Warning (5) Dynamic Range Window violation Mon Jan 25 18:57:05 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sun Jan 24 04:10:28 2021 Warning (5) Dynamic Range Window violation Sun Jan 24 04:10:28 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sat Jan 23 23:49:13 2021 Warning (5) Dynamic Range Window violation Sat Jan 23 23:49:13 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sat Jan 23 18:53:42 2021 Warning (5) Dynamic Range Window violation Sat Jan 23 18:53:42 2021 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:34:58;CMTS-MAC=00:6c:bc:b9:a7:91;CM-QOS=1.1;CM-VER=3.1; Sat Jan 23 18:51:02 2021 Warning (5) Dynamic Range Window violation Connection Page.
Apply 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 673750000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 37 673750000 Hz 2.1 dBmV 40.5 dB 0 0 2 Locked QAM256 9 505750000 Hz 2.8 dBmV 41.2 dB 0 0 3 Locked QAM256 10 511750000 Hz 2.7 dBmV 41.2 dB 0 0 4 Locked QAM256 11 517750000 Hz 2.3 dBmV 41.1 dB 0 0 5 Locked QAM256 12 523750000 Hz 2.1 dBmV 41.1 dB 0 0 6 Locked QAM256 13 529750000 Hz 2.2 dBmV 41.1 dB 0 0 7 Locked QAM256 14 535750000 Hz 2.3 dBmV 41.1 dB 0 0 8 Locked QAM256 15 541750000 Hz 2.3 dBmV 41.1 dB 0 0 9 Locked QAM256 16 547750000 Hz 2.3 dBmV 41 dB 0 0 10 Locked QAM256 17 553750000 Hz 2.8 dBmV 41.2 dB 0 0 11 Locked QAM256 18 559750000 Hz 2.9 dBmV 41.3 dB 0 0 12 Locked QAM256 19 565750000 Hz 2.6 dBmV 41.2 dB 0 0 13 Locked QAM256 20 571750000 Hz 2.6 dBmV 41.1 dB 0 0 14 Locked QAM256 21 577750000 Hz 2.2 dBmV 41.2 dB 0 0 15 Locked QAM256 22 583750000 Hz 2.3 dBmV 41.1 dB 0 0 16 Locked QAM256 23 589750000 Hz 2.1 dBmV 41.1 dB 0 0 17 Locked QAM256 24 595750000 Hz 1.9 dBmV 41 dB 0 0 18 Locked QAM256 25 601750000 Hz 2.5 dBmV 41.2 dB 0 0 19 Locked QAM256 26 607750000 Hz 2.1 dBmV 41.1 dB 0 0 20 Locked QAM256 27 613750000 Hz 2.4 dBmV 41.1 dB 0 0 21 Locked QAM256 28 619750000 Hz 2.7 dBmV 41 dB 0 0 22 Locked QAM256 29 625750000 Hz 2.6 dBmV 40.1 dB 0 0 23 Locked QAM256 30 631750000 Hz 3.1 dBmV 40.9 dB 0 0 24 Locked QAM256 31 637750000 Hz 2.6 dBmV 40.9 dB 0 0 25 Locked QAM256 32 643750000 Hz 2.3 dBmV 41 dB 0 0 26 Locked QAM256 33 649750000 Hz 1.8 dBmV 40.8 dB 0 0 27 Locked QAM256 34 655750000 Hz 1.3 dBmV 40.7 dB 0 0 28 Locked QAM256 35 661750000 Hz 1.8 dBmV 40.8 dB 0 0 29 Locked QAM256 36 667750000 Hz 1.7 dBmV 40.8 dB 0 0 30 Locked QAM256 38 679750000 Hz 2.3 dBmV 40.9 dB 0 0 31 Locked QAM256 39 685750000 Hz 2.5 dBmV 41 dB 0 0 32 Locked QAM256 40 691750000 Hz 2.8 dBmV 41.1 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 5 5120 Ksym/sec 36500000 Hz 42.8 dBmV 2 Locked ATDMA 6 5120 Ksym/sec 30100000 Hz 42.8 dBmV 3 Locked ATDMA 7 5120 Ksym/sec 23700000 Hz 42.8 dBmV 4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock
StatusModulation /
Profile IDChannel
IDFrequency Power SNR /
MERActive Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 0 159 701000000 Hz 3.0 dBmV 41.0 dB 1126 ~ 2969 17044365 105 0 2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA 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 Extended Upstream Transmit Power Enable Extended Upstream Transmit Power Current System Time:Sun Jan 31 15:59:37 2021 System Up Time:00:08:03
