<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
<br class="">
<div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
<div><br class="">
</div>
</div>
</div>
<div>
<blockquote type="cite" class="">
<div class="">On 4 Apr 2023, at 21:48, Peter Phaal <<a href="mailto:peter.phaal@gmail.com" class="">peter.phaal@gmail.com</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class=""><span style="caret-color: rgb(0, 0, 0); font-family: CourierNewPSMT; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Export
of destination AS-Path is supported in the sFlow extended_gateway structure.</span></div>
</blockquote>
<div><br class="">
</div>
As a consumer of sFlow, [as well as NetFlow, IPFIX, etc.] I haven’t run into the use of this option in production, FWIW.<br class="">
<blockquote type="cite" class="">
<div style="caret-color: rgb(0, 0, 0); font-family: CourierNewPSMT; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<pre style="white-space: pre-wrap;" class=""><span style="font-family: arial, sans-serif;" class="">In addition to BGP, there are a number of MPLS, tunnel encap/decap etc. sFlow extended structures. </span></pre>
</div>
</blockquote>
Some of these options are encountered fairly frequently; others, not so much. As you note, they have different applications.<br class="">
<blockquote type="cite" class="">
<div style="caret-color: rgb(0, 0, 0); font-family: CourierNewPSMT; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<pre style="overflow-wrap: break-word;" class=""><font face="arial, sans-serif" class="">Also optical interface metrics, dropped packet notifications, and more:</font></pre>
</div>
</blockquote>
<div>Dropped traffic is pretty much universally supported and utilized, in my experience. Other options, again, not very often. </div>
<div><br class="">
</div>
<div>Some flow telemetry implementations support packet export, to one degree or another; and, of course, there’s PSAMP, which utilizes IPFIX as its transport. AFAIK, these aren’t observed very often in production, to date.</div>
<br class="">
</div>
<div><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">--------------------------------------------</span></div>
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
<div>Roland Dobbins <<a href="mailto:roland.dobbins@netscout.com" class="">roland.dobbins@netscout.com</a>></div>
<div class=""><br class="">
</div>
</div>
</body>
</html>