C3700 giving random lag spikes

[ck95]

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.

[DarrenM]

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

[ck95]

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.

[vkdelta]

@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

[ck95]

@vkdelta

http://i.imgur.com/Lv48baw.png

http://i.imgur.com/67SIBmI.png

[vkdelta]

can you pls post event logs and power values?

[ck95]

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

[vkdelta]

@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.

[ck95]

@vkdelta

Event log from router GUI

Time Priority Description 2015-9-15, 00:07:06.0 Critical (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, 00:07:06.0 Critical (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, 00:11:37.0 Critical (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, 00:11:37.0 Critical (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, 00:14:09.0 Critical (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, 00:14:09.0 Critical (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, 00:24:39.0 Critical (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, 00:24:39.0 Critical (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, 00:24:54.0 Critical (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, 00:24:54.0 Critical (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, 00:26:22.0 Critical (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, 00:27:07.0 Critical (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, 00:27:49.0 Critical (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, 00:28:33.0 Critical (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, 00:29:19.0 Critical (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, 00:30:04.0 Critical (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, 00:30:25.0 Critical (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, 00:30:28.0 Critical (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, 06:07:35.0 Critical (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, 00:00:33.0 Critical (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, 00:01:18.0 Critical (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, 00:01:48.0 Critical (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, 00:00:32.0 Critical (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, 00:00:42.0 Critical (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, 00:01:09.0 Critical (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, 00:00:32.0 Critical (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, 00:01:00.0 Critical (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, 00:00:33.0 Notice (6) WiFi Interface [wl0] set to Channel -5590387-559038737 (Side-Band Channel:-559038737) - Reason:UNKNOWN 1970-1-1, 00:00:33.0 Critical (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, 00:00:33.0 Notice (6) WiFi Interface [wl1] set to Channel -5590387-559038737 (Side-Band Channel:-559038737) - Reason:UNKNOWN 1970-1-1, 00:00:34.0 Notice (6) WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:GUI 1970-1-1, 00:00:34.0 Notice (6) WiFi Interface [wl1] set to Channel 1 (Side-Band Channel:N/A) - Reason:GUI 1970-1-1, 00:00:37.0 Notice (6) WiFi Interface [wl1] set to Channel 153 (Side-Band Channel:149) - Reason:GUI 1970-1-1, 00:00:38.0 Notice (6) WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INTERFERENCE 1970-1-1, 00:00:42.0 Notice (6) Honoring MDD; IP provisioning mode = APM 1970-1-1, 00:01:01.0 Critical (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, 13:52:29.0 Warning (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, 13:52:30.0 Error (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, 17:44:23.0 Critical (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, 01:14:23.0 Error (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

Procedure Status Comment Acquire Downstream Channel 711000000 Hz Locked Connectivity State OK Operational Boot State     Configuration File     Security Enabled BPI+

<tabindex=-1>Downstream Bonded Channels

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1   QAM256   711000000 Hz -6 dBmV 37.3 dB 1857097 27982 2   QAM256   675000000 Hz -5.2 dBmV 37.9 dB 2457552 32524 3   QAM256   681000000 Hz -5.4 dBmV 37.7 dB 2373230 30112 4   QAM256   693000000 Hz -5.5 dBmV 36.6 dB 2102744 28957 5   QAM256   699000000 Hz -5.7 dBmV 36.4 dB 1926573 29218 6   QAM256   705000000 Hz -5.7 dBmV 37.2 dB 1773669 28853 7   QAM256   723000000 Hz -6.2 dBmV 37 dB 1674310 26420 8   QAM256   729000000 Hz -6.4 dBmV 37.2 dB 1629032 26642

<tabindex=-1>Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1   ATDMA   5120 Ksym/sec 37500000 Hz 51 dBmV 2   ATDMA   5120 Ksym/sec 30700000 Hz 51 dBmV 3   ATDMA   5120 Ksym/sec 23800000 Hz 51 dBmV 4   ATDMA   2560 Ksym/sec 18500000 Hz 51.2 dBmV

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

[vkdelta]

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.

[ck95]

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