← Enterprise IT Networks Studio
📊

Bandwidth & QoS Congestion Simulator

Strict-priority DSCP scheduling · Per-class throughput, drops & latency as the link saturates

❌
Link Oversubscribed — 130 Mbps offered into 100 Mbps
Strict-priority queuing protects voice and video first; the lowest-priority (data) class absorbs the drops.

🔧 Link & Traffic

Link Capacity100 Mbps
Voice (EF) offered20 Mbps
Video (AF41) offered40 Mbps
Data (BE) offered70 Mbps
Total offered: 130 Mbps · Served: 100 Mbps

📊 Per-Class Results

Voice (EF)EF / DSCP 46
Throughput
20 Mbps
Dropped
0 (0%)
Latency
3 ms
Video (AF41)AF41 / DSCP 34
Throughput
40 Mbps
Dropped
0 (0%)
Latency
13 ms
Data (BE)BE / DSCP 0
Throughput
40 Mbps
Dropped
30 (43%)
Latency
500 ms
Model: Strict-priority (LLQ) scheduling serves EF voice → AF video → BE data. Each class is admitted up to the remaining capacity; the lowest-priority class absorbs drops first. Queuing latency ≈ base + ρ/(1−ρ)·base, where ρ is the load of this and higher-priority classes vs. capacity (M/M/1 approximation).
Link Utilization · Served traffic stacked by class
Voice20MVideo40MData−3040MCapacity 100 Mbps
Voice (EF)
Video (AF41)
Data (BE)