[a-nsp] VLAN in SNMP Interface Table

[Mike Hammett]

BTW: I did also ask on Extreme-NSP, but that list seems dead. 



https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-monitor-traffic-in-and-out-of-a-vlan 




I take away from that page that it's a switch-level output (such as this VLAN in aggregate across the switch has X in and X out). 


Now that said, I do also see this page: https://gtacknowledge.extremenetworks.com/articles/How_To/Collect-VLAN-statistics-via-CLI-in-EXOS 


That has a similar command, but is broken out by port. Maybe x670 will do what I'm after. 




----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Karsten Thomann" <karsten_thomann at linfre.de> 
To: "Doug McIntyre" <merlyn at geeks.org>, "Joris Claassen via arista-nsp" <arista-nsp at puck.nether.net> 
Sent: Monday, December 9, 2019 10:17:33 AM 
Subject: Re: [a-nsp] VLAN in SNMP Interface Table 

Hi, 

I'm pretty sure I had such counters on an Extreme X670 Switch, but you had to enable that feature per vlan and use non standard oids within their own oid space. 

If Extreme is an option for you I can check some more details, as I should have the self build cacti plugin lying around somewhere... 

Kind regards 
Karsten 



Ursprüngliche Nachricht 


Von: merlyn at geeks.org 
Gesendet: 9. Dezember 2019 14:36 
An: arista-nsp at puck.nether.net 
Betreff: Re: [a-nsp] VLAN in SNMP Interface Table 


On Sun, Dec 08, 2019 at 06:02:47PM -0600, Mike Hammett wrote: 
> This looks like it's only on layer 3 interfaces, which doesn't do me a whole lot of good. 


I don't know of any hardware that keeps track of layer-2 VLAN packet 
counts going through the switch. Generally, stats are updated on times 
when switches have to _do_ something. Forwarding along layer-2 is 
usually done in ASICs and the switch doesn't do anything special for 
decoding the VLAN headers. OOTH, doing a layer-3 routing termination 
is doing something, which is where I measure everything, on the 
layer-3 edge. And every type of hardware I touch can monitor that. 

As posted before, if you need this sort of thing, you'll probably have 
to go to sflow type collectors in order to get what you want. Or 
consider making your network do layer-3 VLAN terminations somewhere so 
that you can measure it. 

Perhaps there is some weird EVPN/vxlan setup you could make that the 
switch will have to do punting of traffic out to a VTEP, and you could 
measure those counts, but I have zero experience monitoring such a setup. 

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