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Repeated No Ranging Response received - T3 time-out critical errors

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Repeated No Ranging Response received - T3 time-out critical errors

Causes service interruptions and angry family.  Modem ARRIS SURFboard SB6141.  Please help!

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Expert

Re: Repeated No Ranging Response received - T3 time-out critical errors

What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.




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Re: Repeated No Ranging Response received - T3 time-out critical errors

Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
6 dBmV  3 dBmV  3 dBmV  3 dBmV  3 dBmV  3 dBmV  4 dBmV  4 dBmV  

 

Upstream:

Power Level45 dBmV 44 dBmV 45 dBmV 52 dBmV 

 

Signal to Noise Ratio37 dB 38 dB 38 dB 39 dB 39 dB 39 dB 39 dB 

39 dB 

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Re: Repeated No Ranging Response received - T3 time-out critical errors

Time Priority Code Message

Sep 30 2020 11:41:593-CriticalR02.0No Ranging Response received - T3 time-out;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 11:37:335-WarningZ00.0MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:186-NoticeN/ACable Modem Reboot due to T4 timeout ;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 11:36:433-CriticalR04.0Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 11:32:433-CriticalR02.0No Ranging Response received - T3 time-out;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR06.0Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR03.0Ranging Request Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR06.0Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR03.0Ranging Request Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR06.0Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:293-CriticalR03.0Ranging Request Retries exhausted;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
Sep 30 2020 10:24:043-CriticalR02.0No Ranging Response received - T3 time-out;CM-MAC=90:3e:ab:88:26:35;CMTS-MAC=00:01:5c:b1:ae:73;CM-QOS=1.1;CM-VER=3.0;
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Expert

Re: Repeated No Ranging Response received - T3 time-out critical errors

The upstream power is too high / out of spec on one of the channels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

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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Re: Repeated No Ranging Response received - T3 time-out critical errors

No excess splitters.  In fact, no splitters in the house at all as we only use wifi.  The connection is tight and the wire is clean and the modem continues to error.

Got a tech visit scheduled finally.

 

Thanks!