Enterprise and Datacenter Network Architecture Core Network Switch & Routing, TCP/IP, Subnetting, Cisco Nexus Switch, Vlan, STP, vPC, vDC, LACP, Dynamic Routing (BGP, EIGRP, OSPF), QoS, Multicast. " Life Cycle Management and Maintenance Hardware Refresh, Software OS Upgrade, Renewals (License, Certificate, Account).