Resiliency validation is a capability designed to assess
the resiliency of network connectivity for ExpressRoute-enabled workloads. This
feature allows you to perform site failovers for your Virtual Network Gateway,
helping to evaluate network resiliency during site outages and validate setup
during migrations by testing the effectiveness of failover mechanisms. By
proactively testing your network, you can ensure continuous connectivity to
Azure workloads and ensure the robustness of your connections.
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more.