CCNA Data Center DCICT 640-916 Official Cert Guide

Server Virtualization Challenges

Server virtualization makes use of virtual switching components to establish connectivity between the virtual machines on the same physical server, between virtual machines on different physical servers, and between virtual machines and bare metal non-virtualization servers. Network connectivity in and out of the virtualized server relies on the switching design implemented in the data center network. At the time of writing this book, the most predominant design for data center networks is a multilayer design, where servers are connected to access layer switches operating at OSI Layer 2. With this design, access layer switches are provisioned with trunked Ethernet links toward the virtualized servers. VLANs added ...