Tools / Network & Throughput / Oversubscription Estimator

Oversubscription Estimator

Part of a Design Flow

This tool continues the Network Design Flow

Use this step to test whether estimated traffic still fits through the uplink hierarchy with practical headroom before moving into latency validation. Calculated values from the previous step can carry forward into this tool, reducing re-entry and preserving design context.

This flow includes both Free and Pro tools. Unlock Pro to complete the full sequence.

Best for: stress-testing oversubscription risk across access, aggregation, and transport layers using realistic peak-demand assumptions.

Pro Tier

🔒 Locked

This tool is included with Pro access for the Network & Throughput category.

What this models

Access layer: edge demand vs uplink
Aggregation layer: downstream demand vs upstream
Core / WAN: expected peak demand vs available transport
Peak-demand risk bands, not just simple ratio math

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Calculator

Compare downstream demand against available uplink capacity across access, aggregation, and core / WAN boundaries using practical peak-demand assumptions.

Layer inputs

Edge / downstream demand (Mbps)

Access uplink capacity (Mbps)

Aggregation downstream demand (Mbps)

Aggregation upstream capacity (Mbps)

Core / WAN expected peak demand (Mbps)

WAN / core transport capacity (Mbps)

Risk assumptions

Overhead reserve (%)

Target peak utilization (%)

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Tip: High oversubscription ratios may be acceptable in bursty office networks, but video and real-time traffic are much less forgiving under congestion.

Results

Run the estimator to see oversubscription ratios, congestion risk, and carried-forward demand context.

Model: demand is increased by the overhead reserve, then compared against access, aggregation, and core / WAN capacity. Utilization and recommended capacity are measured against the selected target operating band.

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