I'm writing because I was on the phone with customer support yesterday and couldn't make much progress. I am experiencing consistent lag spikes every 4-6mins. It is not noticeable during a speed test or in normal internet usage but it makes online gaming practically unplayable.
There have no recent changes or upgrades to my system and I am unaware of any neighborhood changes (and there have been no intervening storms, etc). I first noticed this issue two days ago. I live in an apartment complex in the Midtown, Manhattan area.
I was told that my signal was fine and that Spectrum wasn't seeing anything wrong on their end. They insinuated that it therefore had to a problem on my end and so I have been trying my best to isolate the issue and eliminate all other possible variables over the course of this weekend.
I have plugged the modem (Netgear CM600) directly to my PC (Windows 10) to bypass any potential router / wireless issues. I have also tried this with two different ethernet cables - but this did not solve the problem. I ran an Avast AV and Malwarebytes scan and nothing has come up. I have also disabled the Windows 10 firewall while testing / running PingPlotter.
I have been reading a lot to troubleshoot but I am no means a technical expert so please let me know if any other information would be helpful for this diagnosis. What I do know is that even when directly connected to the modem I am still experiencing this lag spike issue (i.e., it is not a wireless issue, a local bandwidth issue, a router issue, or etc.). Attached below is a PingPlotter screenshot (I have confirmed that the measured latency spikes do, in fact, correlate with the ping spikes that I otherwise am experiencing while playing video games (e.g., Overwatch and League of Legends)).
I'm not sure that I am capable of interpreting the PingPlotter results on my own, but it does at least measure and show the consistency of the ping spikes - so I at least must not be crazy (although admittedly I may soon be getting there out of frustration!). It also shows packet loss on the first hop to Road Runner/TWC/Spectrum but I'm not really sure what that means or if it's some sort of false positive.
Any help would be much appreciated. I understand that the only variable left (that I am aware of) within my control is my modem which I am planning on replacing (will make a trip to Best Buy to use and then return a modem for testing) but wanted to first check to see if the PingPlotter shows any obvious issues.
Here's also a screen shot of PingPlotter during a spike:
Thanks for the response. Unfortunately (?), there doesn't seem to be any uncorrectables. Any other thoughts?
|Downstream Bonded Channels|
|Upstream Bonded Channels|
|2018-09-10, 16:13:06||Critical (3)||Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:30:33:86:e3:d0;CMTS-MAC=00:17:10:87:5b:88;CM-QOS=1.1;CM-VER=3.0;|
|2018-09-09, 08:40:16||Error (4)||Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=2c:30:33:86:e3:d0;CMTS-MAC=00:17:10:87:5b:88;CM-QOS=1.1;CM-VER=3.0;|
|2018-09-09, 08:40:16||Error (4)||Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=2c:30:33:86:e3:d0;CMTS-MAC=00:17:10:87:5b:88;CM-QOS=1.1;CM-VER=3.0;|
|2018-09-08, 22:03:10||Critical (3)||Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:30:33:86:e3:d0;CMTS-MAC=00:17:10:87:5b:88;CM-QOS=1.1;CM-VER=3.0;|
|Time Not Established||Critical (3)||No Ranging Response received - T3 time-out;CM-MAC=2c:30:33:86:e3:d0;CMTS-MAC=00:17:10:87:5b:88;CM-QOS=1.0;CM-VER=3.0;|
|Time Not Established||Notice (6)||Overriding MDD IP initialization parameters; IP provisioning mode = IPv6|