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The Cisco headquarters campus in San Jose, California, was served by four separate OC-3 links for Internet connectivity. When one of the link providers stopped delivering enterprise support to place greater emphasis on the wholesale market, Cisco IT was tasked with identifying and implementing a replacement circuit. Cisco IT replaced the OC-3 circuit with the AT&T Metro Ethernet service and a Cisco 12404 Router for termination. The Metro Ethernet circuit now serves 45 percent of the campus Internet traffic at a cost comparable to the previous OC-3 circuit. Their business benefits were 200-Mbps capacity at comparable cost to previous circuit, incremental capacity increases for controlled costs, no additional hardware cost or service disruption during circuit upgrade and improved capacity, network resilience, and link diversification.
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