Using Empty VLANs Reports Estimated Reading Time: < 1 Minute The Empty VLANs report provides a list of VLANs in the system that are considered 'empty'. A VLAN is considered empty by Ubersmith if it does not contain any IP assignments associated with a device. The Empty VLAN report can be helpful in allowing you to reclaim unused VLANs and to better manage your IP assignments.