<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'>I suspect it always will have value, whether it's peering routers, POP routers, multi-homed customer routers, etc.<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>"Matthew Walster via NANOG" <nanog@nanog.org><br><b>To: </b>"Forrest Christian (List Account)" <lists@packetflux.com><br><b>Cc: </b>"NANOG" <nanog@nanog.org><br><b>Sent: </b>Friday, January 6, 2023 9:34:16 AM<br><b>Subject: </b>Re: SDN Internet Router (sir)<br><br><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Fri, 6 Jan 2023, 11:25 Forrest Christian (List Account), <<a href="mailto:lists@packetflux.com" target="_blank">lists@packetflux.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div dir="auto">In the end though, I do expect that the hassle of setting up and managing a solution like this is likely to result in most people deciding that it isn't worth the extra complexity just to avoid upgrading a low fib device where a larger one is really needed. </div></div></blockquote></div><div dir="auto"><br></div><div dir="auto">Quite the contrary, nearly 10 years ago (just before SIR was released) I was doing this precisely because the lower fib box was a good tradeoff between ports and cost, and needed something to do IXP/PNI peering with. Only instead of running the sflow analysis on the box, I was exporting it elsewhere and pushing prefix filters every once in a while to make sure the highest traffic prefixes were served locally.</div><div dir="auto"><br></div><div dir="auto">Ultimately, it's part of the TCO of your network, and when traffic volumes are high, you look for any opportunity to reduce that CapEx cost of a fully high FIB router. </div><div dir="auto"><br></div><div dir="auto">It sounds like the idea still has value!</div><div dir="auto"><br></div><div dir="auto">M</div><div dir="auto"><br></div><div class="gmail_quote" dir="auto"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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