EtherChannel Topologies(2)

Scaling Bandwidth with Resilience

This figure shows a topology where the network manager has increased bandwidth between the data center and the wiring closet to an aggregate of 800 Mbps, but has also used the physical diversity of the fiber plant to decrease the chances of a network outage. Using a Cisco EtherChannel connection consisting of four Fast Ethernet links, two fiber runs on the east side of the building provide 400 Mbps, and the west side of the building provides the remaining 400 Mbps. In this example, in the event of a fiber cut on one side of the building, the remaining side will pick up the traffic in less than one second, without wiring closet clients losing sessions.