3850X access switches with a VSS pair of 4500X distribution switches. 2921 for SRST and 911 call out. Access switches are balanced across the bottom two 2200VA UPS with the third carrying the 4500X pair, 2921 and analog DVR. The gap mid rack is for a 2U horizontal cable manager that hadn't been delivered yet. All switches are uplinked via 10G redundant links.