Consider the additional feature requirements while selecting Ethernet switches for your VxRail cluster depending on interoperability requirements for different types of storage resources.
If your VxRail cluster includes adapters that support RoCE (RDMA over Converged Ethernet) for VMware vSAN storage connectivity, the supporting network must support a lossless transport. A lossless network is defined as one where no frames are dropped because of network congestion.
- Select switches that support Data Center Bridging (DCB). The Data Center Bridging feature supports the elimination of packet loss due to buffer or queue overflow.
- The DCB must support bandwidth allocation based on priority settings, which are known as Class of Service (CoS).
- Priority Flow Control (PFC) is required on the switches to provide RoCE traffic a higher priority than other network traffic.