× NETGEAR would like to hear from you about specific features so we can improve your experience. To participate in this survey please click HERE.
Reply

C3700 giving random lag spikes

ck95
Aspirant

C3700 giving random lag spikes

When using my router I notice that when I play games I will experience a lag spike once every minute or 2 that last about 3 seconds. It happens on Netflix and other streams too except it will downgrade the stream from full hd down to sd. for a bit. Is there a solution to this problem? It's almost impossible to enjoy online games when you lag out so often.

Message 1 of 11
DarrenM
Sr. NETGEAR Moderator

Re: C3700 giving random lag spikes

Hello ck95

 

what is your Internet speed? if you are connecting the devices that are getting lag spike via wireless try changing the wireless channel. Also check your cable connections to the modem a splitter could be causing issues with the modem.

 

DarrenM

Message 2 of 11
ck95
Aspirant

Re: C3700 giving random lag spikes

My speed is 50 Mbps down. I've tried both wired and wireless connection and I still have the same problem. There is no splitter isntalled it's a straight connect to the cable port.

Message 3 of 11
vkdelta
NETGEAR Expert

Re: C3700 giving random lag spikes

@ck95

 

do you have event logs and power table values? Can you please post them here? probably you have Timeouts which are causing these spikes.

 

also, can you please ping 75.75.75.75 for an hour and see if you spikes?

 

A tool to do it better than DOS command prompt.

http://emcosoftware.com/ping-monitor

 

 

Message 4 of 11
ck95
Aspirant

Re: C3700 giving random lag spikes

Message 5 of 11
vkdelta
NETGEAR Expert

Re: C3700 giving random lag spikes

can you pls post event logs and power values?

Message 6 of 11
ck95
Aspirant

Re: C3700 giving random lag spikes

@vkdelta The event log is on there at the bottom portion. I'm unable to find how to do power values.

Message 7 of 11
vkdelta
NETGEAR Expert

Re: C3700 giving random lag spikes

@ck95

 

sorry, I could not find the event log. (I meant event log from the Cable Router GUI).

 

can you please post the "connection page" from the GUI as well.

 

Message 8 of 11
ck95
Aspirant

Re: C3700 giving random lag spikes

@vkdelta

Event log from router GUI

 

 
 
 
 
TimePriorityDescription
2015-9-15, 00:07:06.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:07:06.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:11:37.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:11:37.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:14:09.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:14:09.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:24:39.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:24:39.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:24:54.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:24:54.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:26:22.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:27:07.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:27:49.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:28:33.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:29:19.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:30:04.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:30:25.0Critical (3)DHCP failed - RS sent, no RA received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-15, 00:30:28.0Critical (3)DHCP FAILED - Discover sent, no offer received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-9-23, 06:07:35.0Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.1;CM-VER=3.0;
1970-1-1, 00:00:33.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:18.0Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:48.0Critical (3)DHCP failed - RS sent, no RA received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:32.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:42.0Critical (3)No Ranging Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:09.0Critical (3)DHCP failed - RS sent, no RA received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:32.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:01:00.0Critical (3)DHCP failed - RS sent, no RA received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:33.0Notice (6)WiFi Interface [wl0] set to Channel -5590387-559038737 (Side-Band Channel:-559038737) - Reason:UNKNOWN
1970-1-1, 00:00:33.0Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:33.0Notice (6)WiFi Interface [wl1] set to Channel -5590387-559038737 (Side-Band Channel:-559038737) - Reason:UNKNOWN
1970-1-1, 00:00:34.0Notice (6)WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:GUI
1970-1-1, 00:00:34.0Notice (6)WiFi Interface [wl1] set to Channel 1 (Side-Band Channel:N/A) - Reason:GUI
1970-1-1, 00:00:37.0Notice (6)WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:149) - Reason:GUI
1970-1-1, 00:00:38.0Notice (6)WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INTERFERENCE
1970-1-1, 00:00:42.0Notice (6)Honoring MDD; IP provisioning mode = APM
1970-1-1, 00:01:01.0Critical (3)DHCP failed - RS sent, no RA received;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.0;CM-VER=3.0;
2015-10-4, 13:52:29.0Warning (5)DHCP WARNING - Non-critical field invalid in response ;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.1;CM-VER=3.0;
2015-10-4, 13:52:30.0Error (4)Primary address failed, secondary active;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.1;CM-VER=3.0;
2015-10-4, 17:44:23.0Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.1;CM-VER=3.0;
2015-10-6, 01:14:23.0Error (4)DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=a0:63:91:60:c5:d8;CMTS-MAC=00:01:5c:7a:52:53;CM-QOS=1.1;CM-VER=3.0;

 

 

Connection Page

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency

<tabindex=-1>Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel711000000 HzLocked
Connectivity StateOKOperational
Boot State  
Configuration File  
SecurityEnabledBPI+

<tabindex=-1>Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1 QAM256 711000000 Hz-6 dBmV37.3 dB185709727982
2 QAM256 675000000 Hz-5.2 dBmV37.9 dB245755232524
3 QAM256 681000000 Hz-5.4 dBmV37.7 dB237323030112
4 QAM256 693000000 Hz-5.5 dBmV36.6 dB210274428957
5 QAM256 699000000 Hz-5.7 dBmV36.4 dB192657329218
6 QAM256 705000000 Hz-5.7 dBmV37.2 dB177366928853
7 QAM256 723000000 Hz-6.2 dBmV37 dB167431026420
8 QAM256 729000000 Hz-6.4 dBmV37.2 dB162903226642

<tabindex=-1>Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1 ATDMA 5120 Ksym/sec37500000 Hz51 dBmV
2 ATDMA 5120 Ksym/sec30700000 Hz51 dBmV
3 ATDMA 5120 Ksym/sec23800000 Hz51 dBmV
4 ATDMA 2560 Ksym/sec18500000 Hz51.2 dBmV

Current System Time: Wed Oct 14 17:48:24 2015

 

Message 9 of 11
vkdelta
NETGEAR Expert

Re: C3700 giving random lag spikes

Your RF line seems not so good.

 

1. Your Upstream power is high 

2. There are quite a few uncorrectables in Downstream. It means that those packets need to be dropped since they were delivered in bad condition.

 

 

Message 10 of 11
ck95
Aspirant

Re: C3700 giving random lag spikes

@vkdelta So what should I do to solve the problem?

Message 11 of 11
Top Contributors
Discussion stats
  • 10 replies
  • 4187 views
  • 0 kudos
  • 3 in conversation
Announcements

Orbi WiFi 6E