This OID counts conforming frames (green frames) that were dropped at the ingress port during the current day, even though they arrived in compliance with the SLA. Engineers investigate this metric when they see frame loss despite conforming traffic, which usually signals congestion, buffer exhaustion, or misconfigured bandwidth limits. A value of 500, for example, means 500 good, SLA-compliant packets were discarded at intake today—a sign of resource pressure.