This document describes what single-sided and double-sided vPCs are and also discuss their pros and cons.
There are two main topologies available for deploying Nexus-A in access layer and Nexus-B in aggregation-layer. These are:
- Single-sided vPC: In single-sided vPCs, each Nexus-A switch connects to a pair of Nexus-B aggregation switches using a unique vPC, but the Nexus-A switches do not run vPC themselves. Each access switch sees its uplink as a simple port-channel, and has no knowledge of vPC.
- Double-sided vPC: In double-sided vPC both the Nexus-B and Nexus-A switches run vPC. Each vPC pair of Nexus-A switches is connected to the aggregation vPC pair using a unique vPC.
