This procedure only applies to VSP 4450 Series, VSP 4900 Series, VSP 7200 Series, VSP 7400 Series, VSP 8200 Series, and VSP 8400 Series.
show sys stats ipmc-threshold-exceeded-cnt
Switch:1>show sys stats ipmc-threshold-exceeded-cnt SourceGroupThresholdExceeded : 7372 EgressStreamThresholdExceeded : 7331