<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'>Have you ruled out local wireless issues, such as a literal side-by-side test?<div><br></div><div>Does the problem still exist when wired?<br><br><div><span name="x"></span><br style="color:rgb( 0 , 0 , 0 );font-family:'times new roman';font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br style="color:rgb( 0 , 0 , 0 );font-family:'times new roman';font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="color:rgb( 0 , 0 , 0 );font-family:'times new 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noopener noreferrer"><img src="http://www.ics-il.com/images/youtubeicon.png" style="border:0pt none" src="http://www.ics-il.com/images/youtubeicon.png"></a><span name="x"></span><br></div><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Mark Tinka" <mark.tinka@seacom.com><br><b>To: </b>"Matt Hoppes" <mattlists@rivervalleyinternet.net><br><b>Cc: </b>"NANOG" <nanog@nanog.org><br><b>Sent: </b>Thursday, October 29, 2020 7:31:59 AM<br><b>Subject: </b>Re: Apple Catalina Appears to Introduce Massive Jitter<br><br><br><br>On 10/29/20 14:27, Matt Hoppes wrote:<br><br>> Is it actually jitter or is it potentially the wireless network card <br>> going into sleep mode? I have seen that type of behavior on Apple <br>> products when the cards go into low power mode although I can’t say I <br>> have noticed that on my laptop.<br><br>Not, not sleep mode, because I am actively using the device to move data <br>to/from the Internet.<br><br>I was actually struggling to upload some files to Youtube last weekend, <br>and had to use another computer to do it as I couldn't figure out what <br>was going on. That it is how bad the jitter is.<br><br>It seems to be a much bigger problem for the upload direction than the <br>download, but it, inevitably creates a symmetrical performance problem.<br><br>Mark.<br></div><br></div></div></body></html>