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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Oh, and one more item of interest… My midtown (14<sup>th</sup> street) Atlanta Comcast Business connection is, for the most part, also rock solid. So, location seems to also play a big part in the QOS.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>/Raj W.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-family:"Calibri",sans-serif;color:black'>From: </span></b><span style='font-family:"Calibri",sans-serif;color:black'>Raj Wurttemberg <rajaw@c64.us><br><b>Date: </b>Thursday, September 4, 2025 at 5:48 PM<br><b>To: </b><neal@mnopltd.com>, Atlanta Linux Enthusiasts <ale@ale.org><br><b>Subject: </b>Re: [ale] So, Comcast says 8-16ms to their first hop is... OK?<o:p></o:p></span></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>My UI looks a little different (UniFi OS 4.3.6 / Network 9.4.19), but those settings should be ok. This is an example of what I see on the dashboard for my Comcast connection:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>(contents of graphic for Comcast warning)<o:p></o:p></p><p class=MsoNormal>High Latency Detected<o:p></o:p></p><p class=MsoNormal>- Avg. Latency: 21 ms<o:p></o:p></p><p class=MsoNormal>- Max. Latency: 93 ms<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This is a new install, so I don’t have any custom SLAs setup yet. At the moment, my SLAs are set to “Auto”.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>/Raj W.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-family:"Calibri",sans-serif;color:black'>From: </span></b><span style='font-family:"Calibri",sans-serif;color:black'><neal@mnopltd.com><br><b>Date: </b>Thursday, September 4, 2025 at 4:45 PM<br><b>To: </b>Atlanta Linux Enthusiasts <ale@ale.org><br><b>Cc: </b>Raj Wurttemberg <rajaw@c64.us><br><b>Subject: </b>Re: [ale] So, Comcast says 8-16ms to their first hop is... OK?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'><o:p> </o:p></span></p></div><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>Thanks for the reply. So, since you have a UDM pro, somebody, before me, setup a Custom Verification rule: <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>This might have been the company that installed security cameras. Does this look remotely sane for Comcast? (75.75.75.75 is Comcast DNS) I have reverted the UDM to use the Auto SLA test to see what happens. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>So, in general I'm hearing Comcast Business still uses a shared coax in many places, and yup, it might suck getting to that first hop. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>regards, <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>Neal<o:p></o:p></span></p><p id=reply-intro><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>On 2025-09-04 16:29, Raj Wurttemberg via Ale wrote:<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in 0in 5.0pt;margin-left:0in;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div id=replybody1><div><p class=v1msonormal1>We have the fault tolerant UDM Pro Max setup (main and "shadow") in our offices, and we have AT&T and Comcast. AT&T is the primary and is always rock-solid. I see the Comcast connection fail a few times during the week, so it is only used as a backup connection. I like it that the UDM Pro lets me know when there are internet issues.<o:p></o:p></p><p class=v1msonormal1> <o:p></o:p></p><p class=v1msonormal1>I too see about the same hop times as you do on AT&T and Comcast. Looking at my UniFi console now, I see that Comcast had six "high latency" alerts today.... None for AT&T.<o:p></o:p></p><p class=v1msonormal1> <o:p></o:p></p><p class=v1msonormal1>/Raj W.<o:p></o:p></p><p class=v1msonormal1> <o:p></o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=v1msonormal1><strong><span style='font-family:"Calibri",sans-serif;color:black'>From: </span></strong><span style='font-family:"Calibri",sans-serif;color:black'>Ale <ale-bounces@ale.org> on behalf of Neal Rhodes via Ale <ale@ale.org><br><strong><span style='font-family:"Calibri",sans-serif'>Reply-To: </span></strong>Atlanta Linux Enthusiasts <ale@ale.org><br><strong><span style='font-family:"Calibri",sans-serif'>Date: </span></strong>Thursday, September 4, 2025 at 1:08 PM<br><strong><span style='font-family:"Calibri",sans-serif'>To: </span></strong><ale@ale.org><br><strong><span style='font-family:"Calibri",sans-serif'>Cc: </span></strong><neal@mnopltd.com><br><strong><span style='font-family:"Calibri",sans-serif'>Subject: </span></strong>[ale] So, Comcast says 8-16ms to their first hop is... OK?</span><o:p></o:p></p></div><div><p class=v1msonormal1><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'> </span><o:p></o:p></p></div><div><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>We've been chasing why the church Unifi UDM Pro router is several times a day alerting that the Comcast Business Internet connection has gone down. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>I did some pathping (kinda like MTR) tests yesterday, and typical times to 8.8.8.8 from the back of the Comcast router, eliminating our local router and lan are about 16ms. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>Of that, 8-14ms is just the local Comcast router getting to its first hop. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>My AT&T Uverse is about 3ms to the first hop, and I understood that to be normal. <o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>I ping the Comcast Account manager, and here is the response:<o:p></o:p></span></p><p class=v1msonormal style='background:white'><em><span style='font-size:10.0pt;font-family:"Aptos",sans-serif;color:black'>Based on the findings, a lot of businesses/churches on the shared coax network in that area experience capacity issues which impacts reliability and performance. To solve this issue, I'd suggest a complete network overhaul, which we could setup and manage. </span></em><o:p></o:p></p><p class=v1msonormal style='background:white'><em><span style='font-size:10.0pt;font-family:"Aptos",sans-serif;color:black'>The first step would be migrating to a dedicated network. Comcast would build out a dedicated fiber connection to the church to guarantee network uptime and speed consistency. To guarantee wifi distribution/quality we would install a managed Meraki Device, with a new switch and Aps throughout the building. </span></em><o:p></o:p></p><p class=v1msonormal style='background:white'><em><span style='font-size:10.0pt;font-family:"Aptos",sans-serif;color:black'>Comcast would invest $11,789.43 to run the fiber line ( no cost to the church), and the monthly cost for everything would be estimated in the 2k-2.5k per month.</span></em><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>Really? Comcast Business Internet is that bad? And it's ok? </span><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>FYI, I have looked on what we could do to change the threshold in the Unifi router to relax the times and we can't find any such. </span><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>regards, </span><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;color:black'> </span><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'>Neal </span><o:p></o:p></p><p class=v1msonormal style='background:white'><span style='font-size:10.0pt;color:black'> </span><o:p></o:p></p></div><p class=v1msonormal1>_______________________________________________ Ale mailing list Ale@ale.org https://mail.ale.org/mailman/listinfo/ale See JOBS, ANNOUNCE and SCHOOLS lists at http://mail.ale.org/mailman/listinfo<o:p></o:p></p></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>_______________________________________________<br>Ale mailing list<br><a href="mailto:Ale@ale.org">Ale@ale.org</a><br><a href="https://mail.ale.org/mailman/listinfo/ale" target="_blank">https://mail.ale.org/mailman/listinfo/ale</a><br>See JOBS, ANNOUNCE and SCHOOLS lists at<br><a href="http://mail.ale.org/mailman/listinfo" target="_blank">http://mail.ale.org/mailman/listinfo</a><o:p></o:p></span></p></div></blockquote><p><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'><o:p> </o:p></span></p></div></body></html>