This INTEGER counts TCP packets FloodGate-1 has observed being retransmitted on inbound traffic through this interface. Since retransmissions are the classic symptom of packet loss or congestion, a rising count here, especially alongside a fgAvrRateIn near the configured limit, points to QoS rate limiting itself as the likely cause of the packet loss rather than an unrelated network fault. A spike in inbound retransmits coinciding with fgAvrRateIn hitting the fgRateLimitIn ceiling would confirm the rate limit is now causing enough drops to trigger TCP retransmission.