Orbi WiFi 7 RBE973
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C7000 nas-100

Co2Outbr3ak
Aspirant

C7000 nas-100

So, we had a storm pass through on Wednesday that messed up my internet. I already took the initial troubleshooting steps and am almost certain my modem is no longer functioning as it should. My ISP (MediaCom) already came out and tested all lines, cables, etc with no issues.

My problem is that my download speeds are fine, but my upload speeds are fluctuating extremely bad, mostly to the point of unusability. I'm supposed to get 200mbps down with a 20mbps upload. I average about 258down/18up which is fine, but now my upload fluctuates between 1mbps and 25mbps constantly. By constantly, I mean every minute. The upload speed craps out but my download is unaffected.

Could the storm have messed my modem up in such a way it doesn't handle upload data how it should? What could be a likely cause of the lines and cables are good? We've tried eliminating all splitters and factory resets with no change in behavior. Our ISP tech DID say our cable outside was NOT grounded but he fixed that.

I'm at a loss, and it makes our internet unreliable, as anything upload related (Xbox services) are unusable in this state.
Message 1 of 5
plemans
Guru

Re: C7000 nas-100

Storms/power surges from them can wreak havoc on electronics. this could have messed with something on the upload side quite easily. 

1. Do you have a screen shot of your connections page (upload and download) and the logs? These can help us.

2. do you have a spare modem you could hook up to test with at all? If this fixes the issues, i'd indeed bet on the storm winning that round. 

3. I know you state that the tech tested all the lines and cables but moisture in a line, corrosion on the adapters, can create intermittent problems. You've stated you removed all splitters so you're saying its directly connected where the coax enters the house? 

Message 2 of 5
Co2Outbr3ak
Aspirant

Re: C7000 nas-100 Upload Speed Fluctuates BAD

I attached the screenshot.
I don't currently have a spare modem to test, so my next step is renting a modem from my ISP for a month to troubleshoot further.
The tech tested for moisture and corrosion. The only issue he found was the ground for the cable line outside wasn't connected, which he fixed. I think this may have caused the problem with the modem itself, but the damage is probably already done. My ISP has already tried everything on their end, so the next step I have is swapping modems to see if it fixes. Upload speed is still bouncing constantly between 1mbps and 20mbps.

Message 3 of 5
plemans
Guru

Re: C7000 nas-100 Upload Speed Fluctuates BAD

Did you have the logs as well?

How old is it? If its within the year warranty, you could open a support ticket with netgear. 

 

Message 4 of 5
Co2Outbr3ak
Aspirant

Re: C7000 nas-100 Upload Speed Fluctuates BAD

The modem is about 14 months old. Just outside the warranty window I'm sure. I tried to register it but it says my services expire like i bought it today. Anyways, the event log and log files are in the spoiler tag.

Spoiler

EVENT LOG:

1970-1-1, 00:00:38 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:43 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:28 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:36 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:49 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:50 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:04 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:05 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:14 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:15 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:02:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 12:13:09 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
2019-6-15, 15:54:40 Critical (3) Resetting the cable modem due to docsDevResetNow
1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 15:56:48 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
2019-6-15, 17:23:54 Critical (3) Resetting the cable modem due to docsDevResetNow
1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 17:26:00 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:38 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 17:38:02 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:38 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 17:42:12 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
2019-6-15, 17:49:59 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 17:55:29 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
2019-6-15, 18:19:55 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
2019-6-15, 18:23:46 Critical (3) Resetting the cable modem due to docsDevResetNow
1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 18:25:55 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:40 Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:40 Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:49 Notice (6) Honoring MDD; IP provisioning mode = IPv4
1970-1-1, 00:00:51 Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.0;CM-VER=3.0;
2019-6-15, 18:45:49 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:3d:cf:99:8e:f8;CMTS-MAC=00:ca:e5:c8:b8:ee;CM-QOS=1.1;CM-VER=3.0;

 

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