Computing Division staff completed the migration of 55 servers from an old Cisco 6500 network switch to newer Cisco Nexus Top-of-Rack switches.   This project involved months of coordination and communication with teams in Networking, Operations, and Scientific Computing Services, as well as with our customers.  The result is the decommissioning of a switch that had reached end-of-service-life and a reduced risk of failure in our networking infrastructure.