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GermanJim's avatar
GermanJim
Aspirant
Dec 03, 2021

One ethernet port stopped working

Have had 2 laptops hard-wired to cable modem CM1100, working for last 5 months.  Yesterday, one laptop could not access internet.  Powered down modem, and whichever laptop is started 1st can access i...
jgnoonan's avatar
jgnoonan
Star
Dec 22, 2017
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 BigQuark  Here is what I have for now.  I would need to reconnect the modem and reprovision it and then put the comcast one back on and then reprovision that.  First, here is confirmation of the version:  

Firmware Version 
V3.01.04
 

Here is the log.  I will connect the modem later tonight when no one will be using the Internet.

 

 
 
 
 
TimePriorityDescription
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-20, 09:37:38Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-20, 01:01:48Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-18, 08:02:22Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-16, 21:20:12Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-16, 00:36:45Critical (3)Resetting the cable modem due to docsDevResetNow
2017-12-15, 12:34:12Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 08:06:20Critical (3)Resetting the cable modem due to docsDevResetNow
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:38:29Critical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:34:45Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:33:21Critical (3)No Ranging Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:32:44Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:32:38Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 07:32:34Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:31:18Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:31:12Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:30:17Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:30:15Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:30:10Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:30:09Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:27:34Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 06:27:30Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 05:28:12Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:01:5c:a7:12:4e;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 05:22:21Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2017-12-15, 05:22:20Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:39:56:4b:b8:68;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
JonMJones10's avatar
JonMJones10
Aspirant
Dec 23, 2017
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I think I'm having the same issue! It's driving me bonkers. Here is what I posted on the Xfinity forums:

 

Hardware Info:

Hardware Version2.02
 
Firmware VersionV3.01.04
 
  
 
CM certificateInstalled

 

Here is the event log of the past 24 hours:

 

 

2017-12-23, 08:40:56

Warning (5)

REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx:10;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Critical (3)

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx:10;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2017-12-22, 17:53:40

Critical (3)

Resetting the cable modem due to docsDevResetNow

2017-12-22, 17:49:50

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx:10;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2017-12-22, 14:14:06

Critical (3)

Resetting the cable modem due to docsDevResetNow

2017-12-22, 14:11:15

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

2017-12-22, 14:07:01

Critical (3)

REG RSP not received;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx:10;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2017-12-22, 13:23:26

Critical (3)

REG RSP not received;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx:10;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

2017-12-22, 07:11:59

Critical (3)

REG RSP not received;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:10;CMTS-MAC=xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;


Note: I removed the MAC addresses, but the CM-MAC and CMTS-MAC do not match.

 

Latest Log after a factory reset on the modem:

 

2017-12-23, 09:01:46

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=00:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

2017-12-23, 09:00:19

Notice (6)

CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: E; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=00:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

2017-12-23, 09:00:19

Warning (5)

Unicast DSID PSN startup error

2017-12-23, 08:59:49

Warning (5)

REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=00:xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx;CMTS-MAC=00:xx:xx:xx:xx:xx;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=xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

 

Here are my current connection stats:

 

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

<tabindex=-1>Startup Procedure

ProcedureStatusComment
Acquire Downstream Channel729000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnableBPI+
IP Provisioning ModeHonor MDDIPv6 only

<tabindex=-1>Downstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPowerSNR / MERUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1LockedQAM25621729000000 Hz6.2 dBmV40.3 dB4875467500
2LockedQAM2561609000000 Hz8.1 dBmV41.0 dB4725342000
3LockedQAM2562615000000 Hz7.7 dBmV40.9 dB4726194100
4LockedQAM2563621000000 Hz7.9 dBmV41.0 dB4727104600
5LockedQAM2564627000000 Hz7.4 dBmV40.9 dB4728014100
6LockedQAM2565633000000 Hz7.4 dBmV40.6 dB4728591600
7LockedQAM2566639000000 Hz7.2 dBmV40.7 dB4729916100
8LockedQAM2567645000000 Hz7.1 dBmV40.6 dB4730795100
9LockedQAM2568651000000 Hz6.9 dBmV40.5 dB4731771200
10LockedQAM2569657000000 Hz6.9 dBmV40.5 dB4732699600
11LockedQAM25610663000000 Hz6.9 dBmV40.4 dB4733666900
12LockedQAM25611669000000 Hz7.0 dBmV40.6 dB4734559800
13LockedQAM25612675000000 Hz7.1 dBmV40.1 dB4735571600
14LockedQAM25613681000000 Hz6.9 dBmV40.3 dB4736394900
15LockedQAM25614687000000 Hz7.2 dBmV40.6 dB4737343800
16LockedQAM25615693000000 Hz6.9 dBmV40.2 dB4738270700
17LockedQAM25616699000000 Hz6.8 dBmV40.2 dB4738007900
18LockedQAM25617705000000 Hz6.7 dBmV40.5 dB4741039900
19LockedQAM25618711000000 Hz6.4 dBmV40.4 dB4741998000
20LockedQAM25619717000000 Hz6.2 dBmV40.3 dB4742880100
21LockedQAM25620723000000 Hz5.9 dBmV40.3 dB4743058100
22LockedQAM25622735000000 Hz5.5 dBmV40.2 dB4743825000
23LockedQAM25623741000000 Hz5.9 dBmV40.2 dB4744437000
24LockedQAM25624747000000 Hz5.3 dBmV40.1 dB4744990400
25Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
26Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
27Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
28Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
29Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
30Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
31Not LockedUnknown00 Hz0.0 dBmV0.0 dB000
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB000

<tabindex=-1>Upstream Bonded Channels

ChannelLock StatusModulationChannel IDFrequencyPower
1LockedATDMA135800000 Hz49.5 dBmV
2LockedATDMA229400000 Hz50.0 dBmV
3LockedATDMA323000000 Hz50.0 dBmV
4Not LockedUnknown00 Hz0.0 dBmV
5Not LockedUnknown00 Hz0.0 dBmV
6Not LockedUnknown00 Hz0.0 dBmV
7Not LockedUnknown00 Hz0.0 dBmV
8Not LockedUnknown00 Hz0.0 dBmV

<tabindex=-1>Downstream OFDM Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPowerSNR / MERActive Subcarrier Number RangeUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords
1Not LockedUnknown00 Hz0 dBmV0 dB0 ~ 0000
2Not LockedUnknown00 Hz0 dBmV0 dB0 ~ 0000

<tabindex=-1>Upstream OFDMA Channels

ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not LockedUnknown00 Hz0 dBmV
2Not LockedUnknown00 Hz0 dBmV

Current System Time: Sat Dec 23 09:17:13 2017 

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Dec 12, 2022
    Copy Link
    donawalt wrote:

    Is there a procedure for replacing a cable modem that is used with a Orbi RBR850 system? I am replacing a CM1200 with a CM2000. I am assuming something like this:

     

    1. Power off RBR850

    2. Disconnect RBR850 cable(s) (I am using Link Aggregation) from cable modem) <Make sure you disable LAG on the RBR before disconnecting the RBR and powering it OFF. 

    3. Use Comcast app to plug in and activate new cable modem (per their instructions to use their app) <After the modem is associated with the ISP, either power OFF The modem or reboot the modem from it's web page. During the reboot or power off cycle, go to step 4 below. 

    4. Connect RBR850 to the new modem and power up RBR850

    5. Backup config file

     

    I highly recommend getting a CAT6A STP cable in between the CM2000 and RBR850 since you'll be at 2.5Gb connection rate between them.