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Nightly internet timeouts and ping spikes

Dreadfenix
Frequent Visitor

Nightly internet timeouts and ping spikes

I've been having an ongoing issue for over half a year now and have had multiple tech visits and my problem still isn't resolved.  I'll be having pings ranging from 20-40 then they will shoot up to somewhere between 100 and 500 to go back down.  Sometimes it's rapid sometimes it's every 10 seconds.  It's become very unbearable.  The techs have done nothing but replace the heads on every end of my cables and it still has not resolved my issue.  Posting my data/errors below.  Any help would be appreciated.  Unfortunately I've cleared logs so I only have recents, but they're relatively the same.

 

Acquire Downstream Channel405000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1LockedQAM2561405000000 Hz1 dBmV41.5 dB00
2LockedQAM2562411000000 Hz0.5 dBmV42.5 dB00
3LockedQAM2563417000000 Hz1.7 dBmV43.2 dB00
4LockedQAM2564423000000 Hz2.6 dBmV43.1 dB00
5LockedQAM2565429000000 Hz1.6 dBmV43.2 dB00
6LockedQAM2566435000000 Hz2.4 dBmV43 dB00
7LockedQAM2567447000000 Hz2.5 dBmV43.9 dB00
8LockedQAM2568453000000 Hz2.7 dBmV43.8 dB00
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1LockedATDMA45120 Ksym/sec16400000 Hz33 dBmV
2LockedATDMA15120 Ksym/sec35600000 Hz33 dBmV
3LockedATDMA25120 Ksym/sec29200000 Hz33 dBmV
4LockedATDMA35120 Ksym/sec22800000 Hz33 dBmV

 

1970-1-1, 00:00:50Notice (6)Honoring MDD; IP provisioning mode = IPv6
1970-1-1, 00:00:40Critical (3)No Ranging Response received - T3 time-out;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:9e:1e:59:cd:61;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:35Notice (6)WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:32Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2021-2-1, 17:09:44Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:9e:1e:59:cd:61;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:33Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:40Critical (3)No Ranging Response received - T3 time-out;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:9e:1e:59:cd:61;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:33Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=dc:ef:09:76:fd:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

Dreadfenix
Frequent Visitor

Re: Nightly internet timeouts and ping spikes

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Dreadfenix
Frequent Visitor

Re: Nightly internet timeouts and ping spikes

Ping statistics for 2607:f8b0:4000:811::2004:
Packets: Sent = 100, Received = 90, Lost = 10 (10% loss),
Approximate round trip times in milli-seconds:
Minimum = 13ms, Maximum = 362ms, Average = 100ms

 

This is an example of my packet loss.  It ranges from 4% to 30% if not higher.  It times out so often it's unbearable.   I'm getting to the point where I want to drop the service, because I can't even use it with this kind of loss.  I've paid for 6 months of packet loss and nothing is being done about it.

Dreadfenix
Frequent Visitor

Re: Nightly internet timeouts and ping spikes

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ComcastVianney
Official Employee

Re: Nightly internet timeouts and ping spikes

Hello, @Dreadfenix! Thank you for reaching out and posting the most recent data. You stated you've had issues for over a year and a half which can be understandably frustrating. I'd like the chance to review the account to get more information about the services and previous work done at the home. Please send me a private message with your name and service address by clicking my username and selecting the send message option. I'll be glad to help.


I am an Official Comcast Employee.
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