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Router Disconnects and Reboots

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Router Disconnects and Reboots

In November 2017 I replaced my Xfinity rental modem with a new TP-Link Archer CR700.  Ever since I have had many issues with disconnects and reboots.  I have contacted Comcast numerous times and they have checked all connections and signals from the pole into my house.  They all said great signal and cant find anything wrong.  After several attempts and undoing and retightening connections they can generally get it going but they don't know what they did to fix it?  I asked 2 of the techs to take a look at my routers system log to see the errors and they told me it was my modem and they were not familiar with it.

Today we had another disconnect and it would not reboot.  I placed another call to Comcast and they scheduled a visit for tomorrow.  About 3 hours later the router did finally reboot and reconnected on its own.  Below are my connection status and error log reports:

 

Startup Procedure


Procedure Status Comment
Acquire Downstream Channel 615000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK d11_m_archercr700_performancepro_c01.cm
Security Enabled BPI+

Downstream Bonded Channels


Channel Status Modulation Channel ID Frequency Power SNR
1 Locked QAM256 19 615000000 Hz -7.2 dBmV 41.5 dB
2 Locked QAM256 1 495000000 Hz -7.4 dBmV 41.3 dB
3 Locked QAM256 2 507000000 Hz -7.4 dBmV 40.2 dB
4 Locked QAM256 3 513000000 Hz -7.4 dBmV 41.5 dB
5 Locked QAM256 4 519000000 Hz -7.6 dBmV 41.3 dB
6 Locked QAM256 5 525000000 Hz -7.9 dBmV 41.2 dB
7 Locked QAM256 6 531000000 Hz -7.8 dBmV 41.2 dB
8 Locked QAM256 7 537000000 Hz -7.9 dBmV 41.2 dB
9 Locked QAM256 8 543000000 Hz -7.8 dBmV 41.1 dB
10 Locked QAM256 9 555000000 Hz -7.8 dBmV 40.7 dB
11 Locked QAM256 18 609000000 Hz -7.1 dBmV 41.7 dB
12 Locked QAM256 20 621000000 Hz -7.2 dBmV 41.7 dB
13 Locked QAM256 21 627000000 Hz -7.1 dBmV 41.7 dB
14 Locked QAM256 22 633000000 Hz -7.2 dBmV 41.6 dB
15 Locked QAM256 23 639000000 Hz -7.2 dBmV 41.4 dB
16 Locked QAM256 24 645000000 Hz -7.2 dBmV 41.8 dB

Upstream Bonded Channels


Channel Status Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 58 5120 ksym/sec 30100000 Hz 54.0 dBmV
2 Locked ATDMA 57 5120 ksym/sec 36500000 Hz 54.0 dBmV
3 Locked ATDMA 59 5120 ksym/sec 23700000 Hz 54.0 dBmV
4 Not Locked Unknown 0 0 ksym/sec 0 Hz 0.0 dBmV

Time Information


CM IP Address 2001:558:4033:f:9ade:d0ff:fe8c:2d12/128
Duration D: 06 H: 17 M: 37 S: 20
Expires Sat Feb 17 09:25:52 2018
Current System Time Sat Feb 10 21:53:49 2018
 
 
 
Firmware Version: v1.1.0 Build 20160812 Rel515810 Hardware Version: V1.1Suppo
 
 

System Log


Time Priority Description
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Priority Description
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Priority Description
Time Not Established Warning (5) B-INIT-RNG Failure - Retries exceeded;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=98:de:d0:8c:2d:12;CMTS-MAC=00:01:5c:79:e0:6e;CM-QOS=1.0;CM-VER=3.0;

 

Any ideas, tips, suggestions or help is appreciated.

Thanks

 

Expert

Re: Router Disconnects and Reboots

The downstream power is weak / marginal and the upstream power is out of spec.

 

That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.


 

 



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