In traditional Ethernet, when a switch buffer fills up, packets are dropped. TCP detects this drop and slows down transmission. However, in lossless environments (like Fibre Channel over Ethernet or iSCSI), dropping packets is catastrophic. QCN solves this by providing a .
Here’s a helpful overview of (likely referring to Quasi-Zenith Satellite System (QZSS) Centimeter-Level Augmentation Service (CLAS) or similar high-precision GNSS correction services, sometimes abbreviated as QCN in certain technical contexts). qcn tracking
| Metric | Description | Normal Value | Danger Zone | | :--- | :--- | :--- | :--- | | | Number of Congestion Notification Msgs per second | 0 - 10 | > 1000 | | Queue Occupancy | Buffer fill level (in bytes) at time of CNM | < 64 KB | > 500 KB | | Quantized Feedback | Numerical value indicating congestion severity (0-63) | 0 - 10 | 40 - 63 | | RPG (Rate Processor) State | Current sending rate of the transmitter | Variable | Max rate for > 10ms | In traditional Ethernet, when a switch buffer fills