Wireshark-users: Re: [Wireshark-users] (Is this message being received by anyone?) How to interpr
I received it! I think most people have moved to an online forum-I forget the details, but perhaps someone else can chime in with them for us? Thanks! :)
> On Mar 28, 2019, at 10:35 AM, L A Walsh <wireshark@xxxxxxxxx> wrote:
>
> (Sorry for duplicates if there are any)
> Usually I see a copy of my email come back to me when I send
> an email to a list, but have seen nothing back from the list.
> I verified my list options, and it seems there might be one
> that could cause suppression depending on definintions, so I
> toggled it to see if that makes a difference.
>
> Thank-you for your forbearance.
>
>
> I was looking to understand the Round Trip Time graph and why it
>
> seems to jump up and down between near 0 and 270ms. That doesn't make
> sense to me -- first I don't see how some of them would have an
> RTT time of near 0 -- I don't see how that would be possible, so
> I figure I don't understand how to read the graph.
>
> Also, I don't see why the RTT would jump up and down and why there
> are "gaps" in the graph like between 45-85 seconds, vs. almost a
> solid-like appearance between 380-410s.
> Here is the RTT and througput graphs I'm trying to decipher:
>
> https://i.imgur.com/4ijLxTJ.jpg
>
> It looks like I have a relatively low latency when the graph
> peaks at around 150ms, but then something causes a jump so that
> latency climbs to over 250ms.
>
> It also seems to be the case where I'm getting low latency that
> my throughput peaks with average packet length falling from 1500
> down to <100bytes.
>
> I don't see any clear errors. or why there is such a sudden drop
>
> Should I be looking for some type of dropped packets or errors?
>
> Could this be cause by my ISP cutting bandwidth in a step-wise
> manner as a means to control? Or could this be some sort of
> buffer-bloat with some buffer filling up and something halting
> output to wait for some buffers to drain...??
>
> Another possibility is the application on my end is running on a
> high speed internal net with a 9k jumbo frame size -- could the
> mismatch between that the external frame size of 1.5k be causing
> some type of hysteresis?
>
> Any ideas on how, if it is possible I might even this out?
>
> It sorta wreaks havok with the local application...
>
> Thanks!
>
>
>
>
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