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Traffic throughput drops significantly when reaching a configured bandwidth limit in Application Control policy.;Logs show packet drops with messages similar to: "PSL Drop: UP_LIMIT".;Traffic experiences retransmissions.;Observed reduced throughput.;Session instability or connection interruptions may occur.;Issue is commonly observed with high-volume or continuous data transfer traffic (for example: backup, replication, file transfer, database synchronization).
The Application Control "Limit" object enforces bandwidth restrictions by dropping packets once the configured threshold is reached. This enforcement mechanism is based on packet dropping (hard limit), not traffic shaping. Traffic types that are sensitive to packet loss (for example, TCP-based bulk transfers) react to dropped packets by triggering retransmissions and congestion control mechanisms, which leads to: Throughput degradation Unstable transfer rates Possible application-level failures This behavior is expected and indicates that the feature is operating as designed.
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