You should be able to do that with Sflow, which they all/most support.
Also, this seems like standard Ifmib stuff, any snmp poller should be able to handle that, from a metrics perspective .
-Steve
I asked over at https://puck.nether.net/mailman/listinfo/arista-nsp a couple weeks ago, but didn't get an answer, so I have moved to a larger group.
I understand that some Arista switches will expose each VLAN in SNMP so I can monitor traffic on a VLAN independently of over VLANs on that same physical interface. Some of them don't.
Which ones do?
I prefer a solid used switch.
10G ports are fine.