<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'>Except VLANs are touched by the layer 2 switch and routed accordingly. Using the mail\post office analogy, it would be like a suite or apartment number at a given address.<div><br></div><div><br></div><div>I'm not going to try to force Arista into my need. If Arista doesn't do it, then I'll move on. It doesn't seem like they do.<br><br><div><span name="x"></span><br style="font-family:'times new roman';font-size:medium;line-height:normal"><br style="font-family:'times new roman';font-size:medium;line-height:normal"><span style="font-family:'times new roman';font-size:medium;line-height:normal">-----</span><br style="font-family:'times new roman';font-size:medium;line-height:normal"><span style="font-family:'times new roman';font-size:medium;line-height:normal">Mike Hammett</span><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="http://www.ics-il.com/" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank">Intelligent Computing Solutions</a><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="https://www.facebook.com/ICSIL" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/fbicon.png"></a><a href="https://plus.google.com/+IntelligentComputingSolutionsDeKalb" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/googleicon.png"></a><a href="https://www.linkedin.com/company/intelligent-computing-solutions" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/linkedinicon.png"></a><a href="https://twitter.com/ICSIL" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/twittericon.png"></a><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="http://www.midwest-ix.com/" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank">Midwest Internet Exchange</a><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="https://www.facebook.com/mdwestix" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/fbicon.png"></a><a href="https://www.linkedin.com/company/midwest-internet-exchange" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/linkedinicon.png"></a><a href="https://twitter.com/mdwestix" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/twittericon.png"></a><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="http://www.thebrotherswisp.com/" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank">The Brothers WISP</a><br style="font-family:'times new roman';font-size:medium;line-height:normal"><a href="https://www.facebook.com/thebrotherswisp" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img src="http://www.ics-il.com/images/fbicon.png"></a><a href="https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg" rel="nofollow%20noopener%20noreferrer nofollow noopener noreferrer" style="font-family:'times new roman';font-size:medium;line-height:normal" target="_blank"><img 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>"Doug McIntyre" <merlyn@geeks.org><br><b>To: </b>arista-nsp@puck.nether.net<br><b>Sent: </b>Monday, December 9, 2019 8:32:07 AM<br><b>Subject: </b>Re: [a-nsp] VLAN in SNMP Interface Table<br><br><br>I'd count the packets exiting a port as doing some work.<br><br>Maybe a better analogy would be you have a bunch of envelopes sent<br>through the post office. You are asking a counter to see how many<br>pieces of paper are in each envelope. The post office only delivers<br>the envelopes, so we have a total count of envelopes. Only if we need<br>to burst open the envelopes (layer-3) and start routing the pieces of paper<br>based on their top tag, will we have counters on them. As long as the<br>post office keeps forwarding intact envelopes (ie. layer-2), we won't have<br>visibility into inside.<br><br><br><br><br>On Mon, Dec 09, 2019 at 07:40:00AM -0600, Mike Hammett wrote:<br>> If the first paragraph were true, we'd never have port counters on a switch. <br>> <br>> <br>> <br>> <br>> ----- <br>> Mike Hammett <br>> Intelligent Computing Solutions <br>> <br>> Midwest Internet Exchange <br>> <br>> The Brothers WISP <br>> <br>> ----- Original Message -----<br>> <br>> From: "Doug McIntyre" <merlyn@geeks.org> <br>> To: arista-nsp@puck.nether.net <br>> Sent: Monday, December 9, 2019 7:36:05 AM <br>> Subject: Re: [a-nsp] VLAN in SNMP Interface Table <br>> <br>> On Sun, Dec 08, 2019 at 06:02:47PM -0600, Mike Hammett wrote: <br>> > This looks like it's only on layer 3 interfaces, which doesn't do me a whole lot of good. <br>> <br>> <br>> I don't know of any hardware that keeps track of layer-2 VLAN packet <br>> counts going through the switch. Generally, stats are updated on times <br>> when switches have to _do_ something. Forwarding along layer-2 is <br>> usually done in ASICs and the switch doesn't do anything special for <br>> decoding the VLAN headers. OOTH, doing a layer-3 routing termination <br>> is doing something, which is where I measure everything, on the <br>> layer-3 edge. And every type of hardware I touch can monitor that. <br>> <br>> As posted before, if you need this sort of thing, you'll probably have <br>> to go to sflow type collectors in order to get what you want. Or <br>> consider making your network do layer-3 VLAN terminations somewhere so <br>> that you can measure it. <br>> <br>> Perhaps there is some weird EVPN/vxlan setup you could make that the <br>> switch will have to do punting of traffic out to a VTEP, and you could <br>> measure those counts, but I have zero experience monitoring such a setup. <br>> <br>> -- <br>> arista-nsp mailing list <br>> arista-nsp@puck.nether.net <br>> https://puck.nether.net/mailman/listinfo/arista-nsp <br>> <br>-- <br>arista-nsp mailing list<br>arista-nsp@puck.nether.net<br>https://puck.nether.net/mailman/listinfo/arista-nsp<br></div><br></div></div></body></html>