Nexus vPC (virtual PortChannel) is a Cisco technology that allows a single device to appear as a single logical port-channel endpoint to two different upstream devices. This provides Layer 2 multipathing, which enhances network redundancy and bandwidth utilization. It is commonly used in data centers to connect servers to a pair of Nexus switches in an active/active manner, eliminating the need for Spanning Tree Protocol (STP) in that segment of the network. vPC creates a loop-free topology, increases available bandwidth, and provides fast convergence in case of a failure.
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