I was not aware we did but after installing the Advanced IP Scanner I have this:
![Capture2.JPG Capture2.JPG](https://community.meraki.com/t5/image/serverpage/image-id/8552i5EAF864B5BBC483D/image-size/large?v=v2&px=999)
Which is our Dell Compellent Storage Center (SC220). The MAC addresses are in the same range AND the Manufacturer.
I have checked and management app for the SC220 and do not see any of the IP interfaces with the MAC addresses listed on the firewall.