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Planning Guide—Dell EMC VxRail 4.x vSAN Stretched Cluster
Executive summary Overview Networking and latency
Layer 2 and Layer 3 support
Supported geographical distances
Data site to data site network latency
Data site to data site bandwidth
Data site to witness network latency
Data site to witness network bandwidth
Inter-site MTU consistency
Connectivity
Witness traffic separation
Appendix A Appendix B

Layer 2 and Layer 3 support

Layer 2 and Layer 3 support

  • Starting with VxRail 4.7.300, you can use Layer 3 between the two sites, but you must use Layer 2 for the management network.

    For vSAN, you can use either Layer 2 or Layer 3. However, for Layer 2 configurations. Ensure that the Witness site in L2 enclosures is using high bandwidth and low latency.

    Connectivity between the data sites and the witness must be Layer 3. Figure 1 illustrates a supported configuration.

    Figure 1.              VxRail Supported Topology