An entry describes cumulative and aggregate MDI metrics for a single traffic flow. The devices creates a row in the cfmMdiMetricsTable when a flow monitor starts monitoring a traffic flow and has been configured to compute MDI metrics for the same traffic flow. Likewise, the device destroys a row in the cfmMdiMetricsMetricsTable when the corresponding flow monitor has ceased monitoring the traffic flow (e.g., when a traffic flow has timed out).