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When most network managers hear the word virtualization, they immediately think of the data center. There is a tremendous need for virtualization in most data centers. By virtualizing servers and the data center infrastructure, businesses can realize considerable cost savings in terms of capital outlay, rack space, energy, and management expenses. All Cisco Catalyst switches support Virtual Routing and Forwarding (VRF), which can be used to build multiple virtual networks over a common IP infrastructure. IP services such as Dynamic Host Configuration Protocol (DHCP), Policy-Based Routing (PBR), NetFlow, and Telnet, among others, are VRF-enabled so that one can deploy the common network services within a virtual network instance.
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