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Unicast Maintenance Ranging attempted - No response - Retries exhausted

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Regular Visitor

Unicast Maintenance Ranging attempted - No response - Retries exhausted

I have been having connection issues with my internet and have had technicain out on 4/9/2020 and they said no issue detected. The replaced the ends of the cables and tested the signal. They also installed a "filter" which has a ground he said and removed the grounding block that was there. No splitters are in play as I only have internet. Before the tech came out I was getting t3 and t4 timeouts in my modem log. I cleared my event log and I am already getting these again and having issues.

I have also battled this for sometime I am on my second new modem coming from a motorola sb6183, purchased a netgear modem and returned and now I am using a MB7621. It is such a huge pain to call cupport and get the run around and then to have a tech come out and say there is not a problem.

Fri Apr 10 20:19:44 2020    Critical (3) 

 Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC

 

 Fri Apr 10 20:19:44 2020   Critical (3)

 Unicast Maintenance Ranging attempted - No response - Retries exhausted

 

 

Fri Apr 10 20:19:44 2020    Critical (3)   16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC
Sat Apr 11 00:16:42 2020    Critical (3)   Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC

 

 Downstream Bonded Channels
 

 

 
 

 


  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
1 Locked QAM256 9 531.0 8.7 40.1 146 95
2 Locked QAM256 33 459.0 7.1 40.0 175 111
3 Locked QAM256 34 465.0 7.1 40.0 176 131
4 Locked QAM256 35 471.0 7.1 40.0 212 94
5 Locked QAM256 36 477.0 6.9 39.9 219 136
6 Locked QAM256 1 483.0 6.9 40.0 179 159
7 Locked QAM256 2 489.0 7.1 40.0 168 191
8 Locked QAM256 3 495.0 7.4 39.4 186 75
9 Locked QAM256 4 501.0 7.6 39.1 203 81
10 Locked QAM256 5 507.0 7.9 35.4 196 75
11 Locked QAM256 6 513.0 8.1 39.0 125 74
12 Locked QAM256 7 519.0 8.3 40.0 116 109
13 Locked QAM256 8 525.0 8.7 40.1 134 155
14 Locked QAM256 10 537.0 8.8 40.1 117 113
15 Locked QAM256 11 543.0 8.8 40.0 146 87
16 Locked QAM256 12 549.0 8.7 40.0 105 108
17 Locked QAM256 13 555.0 9.2 41.5 116 155
18 Locked QAM256 14 561.0 9.1 41.5 98 151
19 Locked QAM256 15 567.0 9.3 41.5 78 154
20 Locked QAM256 16 573.0 9.4 41.0 66 146
21 Locked QAM256 17 579.0 9.5 41.3 88 148
22 Locked QAM256 18 585.0 9.5 40.8 76 149
23 Locked QAM256 19 591.0 9.8 41.2 76 141
24 Locked QAM256 20 597.0 10.0 41.1 89 151
Total             3290 2989
Upstream Bonded Channels
 

 

 
 

 


  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
1 Locked ATDMA 3 5120 23.0 46.0
2 Locked ATDMA 1 5120 35.8 48.8
3 Locked ATDMA 2 5120 29.4 48.0
4 Not Locked Unknown 0 0 0 0.0
5 Not Locked Unknown 0 0 0 0.0
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0
Highlighted
Regular Visitor

Re: Unicast Maintenance Ranging attempted - No response - Retries exhausted

Do Xfinity employees read this forum? I am still having issue and just had another t4 timeout and completeley dropped my internet while I was working. I am also only connecting to once channel on the upload side.

Sun Apr 19 15:49:10 2020    Critical (3)   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
 Time Not Established   Critical (3)   No Ranging Response received - T3 time-out;CM-VER=3.0; 
 Sun Apr 19 15:53:33 2020    Critical (3)   Resetting the cable modem due to docsDevResetNow 
 Time Not Established   Notice (6)   Honoring MDD; IP provisioning mode = IPv6 

 

 Upstream Bonded Channels
 

 

 
 

 


  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
1 Locked ATDMA 2 5120 29.4 57.0
2 Not Locked Unknown 0 0 0 0.0
3 Not Locked Unknown 0 0 0 0.0
4 Not Locked Unknown 0 0 0 0.0
5 Not Locked Unknown 0 0 0 0.0
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0
Highlighted
Expert

Re: Unicast Maintenance Ranging attempted - No response - Retries exhausted

The upstream power is approaching the high end of being in spec but it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

 

If there is nothing that can be done to improve the connection / obtain more wiggle room, you have no choice but to get the techs involved again until it is fixed properly.

 

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.

Good luck with it !


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Highlighted
Regular Visitor

Re: Unicast Maintenance Ranging attempted - No response - Retries exhausted

I really appreciate your response but how do I make that happen? Keep trying to tell them it is a bigger issue and hope they take the time to do it? That's what I have been doing wish there was someone that could see my logs, understand it and put it through to the right person.