Voice over IP (VoIP) and WebRTC video streams require strict latency constraints (≤ 150ms round-trip) and near-zero jitter (≤ 20ms) to prevent audio clipping and dropped calls.
1. DSCP Quality of Service (QoS) Mapping Matrix
| Traffic Type | DSCP Hex / Name | CoS (802.1p) | Switch Queue Algorithm |
|---|---|---|---|
| Voice RTP Payload | EF (Expedited Forwarding - 46) | 5 (Voice) | Strict Priority (PQ) |
| SIP Call Signaling | CS3 / AF31 (24 / 26) | 3 (Call Control) | Weighted Fair Queue (WFQ) |
| Interactive Video | AF41 (Multimedia - 34) | 4 (Video) | Deficit Round Robin (DRR) |
| Standard Corporate Data | CS0 (Best Effort - 0) | 0 (Best Effort) | Tail Drop / WRED |