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MartinBeee
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Unusual network loss (Sync failures and lost MDD timeouts)

Hi, I've been experiencing random network loss for a few weeks now, but today was particularly bad.

Symptoms

As said, random network stutter and loss, which recovers quite quickly, but is definitely noticeable.
Experienced a bad network loss today that took more than a few minutes to recover.
This was experienced throughout all of the network devices connected via WiFi and via ethernet.

There was an area-wide network outage on 04/27/21, however, none that I've seen today (04/29/21).


Specs

CGNV4-FX4 Router - Hitron Technologies
Router connected to EERO Mesh WiFi via ethernet

Logs

No.TimeTypePriorityEvent
104/27/21 12:00:3584020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
204/27/21 12:00:3982000400criticalReceived Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
304/27/21 12:13:1690000000warningMIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
404/27/21 12:13:3373040100noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
504/29/21 11:48:4782000200criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
604/29/21 14:52:0284000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
704/29/21 14:52:0984020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
804/29/21 14:52:4184000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
904/29/21 14:52:4784020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1004/29/21 14:58:4084000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1104/29/21 14:58:4684020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1204/29/21 14:59:4384000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1304/29/21 14:59:4884020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1404/29/21 15:09:0184000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1504/29/21 15:09:0684020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1604/29/21 15:10:3284000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1704/29/21 15:10:3784020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1804/29/21 15:11:3984000500criticalSYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
1904/29/21 15:11:4484020200warningLost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
2004/29/21 15:59:0682000200criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

Downstream Overview

PortFrequency (Hz)ModulationPower (dBmV)SNR (dB)Channel
1298750000256QAM5.90037.35621
2138750000256QAM5.40038.6051
3146750000256QAM5.20038.6052
4154750000256QAM5.10037.6363
5162750000256QAM5.10038.9834
6170750000256QAM5.20038.9835
7178750000256QAM5.40038.6056
8186750000256QAM5.60038.6057
9194750000256QAM5.60038.9838
10202750000256QAM5.50038.6059
11210750000256QAM5.50038.98310
12218750000256QAM5.40038.60511
13226750000256QAM5.40038.60512
14234750000256QAM5.20037.63613
15242750000256QAM4.60038.60514
16250750000256QAM4.40037.63615
17258750000256QAM4.00038.60516
18266750000256QAM4.20038.98317
19274750000256QAM4.50037.63618
20282750000256QAM5.00038.60519
21290750000256QAM5.30038.60520
22306750000256QAM6.20038.60522
23314750000256QAM6.20037.35623
24322750000256QAM6.20038.98324

 

Upstream Overview

PortFrequency (Hz)BandwidthModulationPower (dBmV)Channel
1258000006400000ATDMA46.2904
2394000006400000ATDMA45.5402
3326000006400000ATDMA45.2903
4462000006400000ATDMA45.0001


I've set up a BMQ in an attempt to catch this sort of behavior but unfortunately did it after the incident.

 

My Broadband Ping - Home

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Zoie_P
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Re: Unusual network loss (Sync failures and lost MDD timeouts)

Hi MartinBeee, 

Thanks for your post and welcome to our forums.

Sorry to hear you are suffering from dropouts, your BQM looks fine, do you have a live link ?

Zoie

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MartinBeee
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Re: Unusual network loss (Sync failures and lost MDD timeouts)

Hi Zoie, the BQM is a live feed, if you'd click on the image should take you there, although the BQM is now normal. It looks like after the second area wide outage the network problems have resolved and the network seems to be stable now. Props to the engineers that came to fix the area wide issue which seems to have resolved my problems!
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Zoie_P
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Re: Unusual network loss (Sync failures and lost MDD timeouts)

Glad to hear MatrinBee

Zoie

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