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#3848 - 06/12/21 11:20 AM Episodic Jitter part 2
Austinite Offline


Registered: 12/27/20
Posts: 14
I am seeing periods of very high jitter. At one point there was an issue with the router but that is no longer the case. My pings back to the router are not an issue.

This is a few examples of three hour tracings where the jitter goes away. I thought I had found a node that was the cause but I include it in the data below and I am not sure that it is the culprit. Any advice on what issue I can bring to spectrum would be helpful.

Quad9:
https://share.pingplotter.com/L9pAfSDEdnj

Local Router:
https://share.pingplotter.com/PLhtdy3g3mo

Google:
https://share.pingplotter.com/PQHcrJbvEi5

UTexas:
https://share.pingplotter.com/cyQNfwHMeLG

What I thought was a bad node:
https://share.pingplotter.com/ZStGFTksUgv

Perhaps what confuses me even more though is that a wired ethernet connection seems to have a very different tracing. But the times out to the first node seem to be the same. What would explain this?

Wireless:
https://share.pingplotter.com/LuYh65fF26t

Wired:
https://share.pingplotter.com/GbXEFa19zFV


Edited by Austinite (06/12/21 02:27 PM)

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#3849 - 06/14/21 08:02 PM Re: Episodic Jitter part 2 [Re: Austinite]
Poe Offline
Pingman Tools Support


Registered: 02/11/19
Posts: 65
Hi Austinite,

After looking through all of your traces I see that there are several different things going on. On both the 8.8.8.8 and the 9.9.9.9 there is a ton of spikes that appear to be isolated to the final hop and do not go back up the hops. I am not sure what to make of these but since none of the pp2s for the 8.8.8.8 and 9.9.9.9 have overlapping times it's hard to know where the issue might originate other than at the destination, which seems odd.

On the 9.9.9.9 wireless, right before 9 am on 6/12, the latency jumps and the jitter starts. It looks to me like the wireless bandwidth was getting saturated. While the latency mostly stays in the green the saturation is causing high jitter. Also right at noon, it looks like the route completely changed for a few minutes and then went back.

The pattern for utexas.edu seems pretty normal, overall it's mostly in the green but it looks like it's getting a lot of use, and then at around 10 pm it tapers off and looks pretty stable.

I also see on your unifi.localdomain trace that it has some pretty high latency spikes into the 30-40ms range so that may be something to look into as well.

If you can get data from 8.8.8.8, your router, and utexas.edu all at the same time and compare the graphs by double-clicking from the All Targets Summary you might start to see a bigger picture. If you can get that data and send it our way we'd be happy to take another look.

Let us know when you have some more data to look at!

-Poe

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#3850 - 06/15/21 06:13 PM Re: Episodic Jitter part 2 [Re: Poe]
Austinite Offline


Registered: 12/27/20
Posts: 14
Simultaneous tracings below. What does not make sense to me is there is a big difference between Google and Quad9? How could that be a wireless or router issue? While there are pings every 5 minutes or so that are long back to the router the pings are otherwise pretty solid.

I am really at a los to get my arms around what is going on.

Thanks for looking.

Router:
https://share.pingplotter.com/h1SJVnTDCCR

Google:
https://share.pingplotter.com/X4zBsrexbHj

Quad9:
https://share.pingplotter.com/JbSNUBqDtts

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