Orbi WiFi 7 RBE973
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CM1200 Speed, firmware

metasharma
Follower

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 Netgear for the latest version. Where can I install that from please? 

2. I have Netgear C7000 WiFi Router connected. No matter what I do, my speedtest does not go beyond 200 MB even while standing next to the router! Router has the latest firmware. Also I get connection dropped frequently. 

Any suggestions on 1 and 2?

Thanks

 

Model: CM1200|Nighthawk Multi-Gig Speed Cable Modem
Message 1 of 14
plemans
Guru

Re: CM1200 Speed, firmware


@metasharma wrote:

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 Netgear for the latest version. Where can I install that from please? ---You don't. The isp does. The use the firmware that they certify for the CM1200. Its not user updated. 

https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-mod...

2. I have Netgear C7000 WiFi Router connected. No matter what I do, my speedtest does not go beyond 200 MB even while standing next to the router! Router has the latest firmware. Also I get connection dropped frequently. ----I'm impressed you have both the cm1200 and the C7000 working together. The c7000 is a modem/router combo device and doesn't have a wan port. To get it working, you'd have to rig it up using some gimmicks to get it working. similar to here: https://community.netgear.com/t5/Cable-Modems-Routers/Can-I-use-a-C6300-cable-modem-without-cable-in...

Do you actually have the C7000 or is it a router only device? and if so, which one? 

Any suggestions on 1 and 2?

Thanks

 


 

Message 2 of 14
Topology
Virtuoso

Re: CM1200 Speed, firmware

Metasharma, you should automatically receive the latest CM1200 firmware (V2.02.05) from Comcast when you reboot the modem.

Model: CM1200|Nighthawk Multi-Gig Speed Cable Modem, RAX120|Nighthawk AX12 12-Stream WiFi Router
Message 3 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

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.

 

 

Message 4 of 14
FURRYe38
Guru

Re: CM1200 Speed, firmware

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-Mod...

 

Ask the ISP to ensure the modems FW is up to date:

https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-mod...

 

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.

 

 


 

Message 5 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

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 2021Warning (5)Dynamic Range Window violation
Sun Jan 31 14:05:16 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Sun Jan 31 10:51:34 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Sat Jan 30 22:04:08 2021Warning (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 2021Critical (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 2021Warning (5)Dynamic Range Window violation
Wed Jan 27 19:55:16 2021Warning (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 2021Notice (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 2021Warning (5)Unicast DSID PSN startup error
Wed Jan 27 19:54:24 2021Notice (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 2021Warning (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 2021Notice (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 EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (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 2021Warning (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 2021Notice (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 EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (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 2021Critical (3)Resetting the cable modem due to docsDevResetNow
Wed Jan 27 18:50:32 2021Notice (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 2021Warning (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 2021Notice (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 EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (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 2021Critical (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 2021Warning (5)Dynamic Range Window violation
Mon Jan 25 21:06:52 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Mon Jan 25 20:16:37 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Mon Jan 25 18:57:05 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Sun Jan 24 04:10:28 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Sat Jan 23 23:49:13 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Sat Jan 23 18:53:42 2021Warning (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 2021Warning (5)Dynamic Range Window violation
Message 6 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

Connection Page.

 
 
Apply               Cancel     
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
ProcedureStatusComment
Acquire Downstream Channel673750000 HzLockedConnectivity StateOKOperationalBoot StateOKOperationalSecurityEnabledBPI+IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25637673750000 Hz2.1 dBmV40.5 dB002LockedQAM2569505750000 Hz2.8 dBmV41.2 dB003LockedQAM25610511750000 Hz2.7 dBmV41.2 dB004LockedQAM25611517750000 Hz2.3 dBmV41.1 dB005LockedQAM25612523750000 Hz2.1 dBmV41.1 dB006LockedQAM25613529750000 Hz2.2 dBmV41.1 dB007LockedQAM25614535750000 Hz2.3 dBmV41.1 dB008LockedQAM25615541750000 Hz2.3 dBmV41.1 dB009LockedQAM25616547750000 Hz2.3 dBmV41 dB0010LockedQAM25617553750000 Hz2.8 dBmV41.2 dB0011LockedQAM25618559750000 Hz2.9 dBmV41.3 dB0012LockedQAM25619565750000 Hz2.6 dBmV41.2 dB0013LockedQAM25620571750000 Hz2.6 dBmV41.1 dB0014LockedQAM25621577750000 Hz2.2 dBmV41.2 dB0015LockedQAM25622583750000 Hz2.3 dBmV41.1 dB0016LockedQAM25623589750000 Hz2.1 dBmV41.1 dB0017LockedQAM25624595750000 Hz1.9 dBmV41 dB0018LockedQAM25625601750000 Hz2.5 dBmV41.2 dB0019LockedQAM25626607750000 Hz2.1 dBmV41.1 dB0020LockedQAM25627613750000 Hz2.4 dBmV41.1 dB0021LockedQAM25628619750000 Hz2.7 dBmV41 dB0022LockedQAM25629625750000 Hz2.6 dBmV40.1 dB0023LockedQAM25630631750000 Hz3.1 dBmV40.9 dB0024LockedQAM25631637750000 Hz2.6 dBmV40.9 dB0025LockedQAM25632643750000 Hz2.3 dBmV41 dB0026LockedQAM25633649750000 Hz1.8 dBmV40.8 dB0027LockedQAM25634655750000 Hz1.3 dBmV40.7 dB0028LockedQAM25635661750000 Hz1.8 dBmV40.8 dB0029LockedQAM25636667750000 Hz1.7 dBmV40.8 dB0030LockedQAM25638679750000 Hz2.3 dBmV40.9 dB0031LockedQAM25639685750000 Hz2.5 dBmV41 dB0032LockedQAM25640691750000 Hz2.8 dBmV41.1 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA55120 Ksym/sec36500000 Hz42.8 dBmV2LockedATDMA65120 Ksym/sec30100000 Hz42.8 dBmV3LockedATDMA75120 Ksym/sec23700000 Hz42.8 dBmV4Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Downstream OFDM Channels
ChannelLock
Status
Modulation /
Profile ID
Channel
ID
FrequencyPowerSNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0159701000000 Hz3.0 dBmV41.0 dB1126 ~ 29691704436510502Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV2Not Locked000 Hz0 dBmV
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Sun Jan 31 15:59:37 2021System Up Time:00:08:03 

 

Message 7 of 14
plemans
Guru

Re: CM1200 Speed, firmware

@JoeMor I noticed, you jumped on someone else's thread. 

Why don't you start your own so we're not confusing your info with the OP's? 

Just to keep things seperated from yours to theirs. 

Message 8 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

This is my thread.  Netgear support person I worked with didn't understand English very well.

 

 

Message 9 of 14
plemans
Guru

Re: CM1200 Speed, firmware

Pretty sure the #1 post is someone else. 

Message 10 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

Not my fault my support case had a pointer to this.  BTW, netgear in there ever loving grace closed my case out event though it wasn't resolved.  This would be like the 5th time this happened.  Instead of paying support people on how fast cases are resolved.  Why not base if off of actually asking the customer if there case was resolved.

 

Also, my speed problem started the time the speedtest was changed.  For some reason, the test tests the upload speed now first before testing the download speed like it use to when I wasn't having a problem.

 

 

Message 11 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

So instead of complaining about service edicate.  Why not resolve the problem instead of pushing to close them so fast.  I am pretty sure this is a Netgear issue at this point.

Message 12 of 14
plemans
Guru

Re: CM1200 Speed, firmware

1. This is the public support forum. We're not netgear or support. We're here trying to help everyone. 

2. the terms and conditions specifically say don't thread jump. thread jumping is trying to use someone elses thread to try to fix your problem because it confuses their issue with yours

3. Support probably did point you at the forums because its free versus having to pay support for help but start your own thread to be fair to the OP

Message 13 of 14
JoeMor
Tutor

Re: CM1200 Speed, firmware

I dropped ~$1,000 on all 3 products combined and I can't get a speed greater than 600 Mbps.

Message 14 of 14
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