Summary: We would like to be able to see when was the last time a network port had network traffic

Details: 
In Meraki we can see, when a device was last connected to the port and sent traffic.

To start with it would be great to have a field "Last activity: HH:mm DD/MM/YYY"

date graph can be added later

We have below switch models:

- SG3452XP v2.20

- SG3452XMPP v1.0

Benefits:

- See if and when port is being utilized

- in fully patched network racks, be able quickly re-patch new connections to non-used ports. Instead of adding new switches