By default, our signature rejects the Packets In/Out tests for a switch due to most of these devices being Layer-2.
Attached to this article is a signature that will allow discovery of the Packets In and Packets Out tests against a switch.
After deploying the signature, you should now be able to discover the Packets In/Out ("Network Interface: Packets Transmitted" subType 'interface_pkt_rate') tests for device type 'switch'.
The attached signature does not filter against specific interface types (i.e. all interface types would be able allowed).