Security Calculators
Chapter 9 — Interactive Tools for Router Security Sizing, Scoring, and Planning
This chapter provides five interactive calculators designed to assist network engineers and security architects in quantifying, sizing, and scoring key aspects of router security configuration. Each calculator provides real-time visual feedback as you adjust inputs, enabling rapid what-if analysis and design validation. Results are for planning and estimation purposes; always validate against vendor documentation and actual traffic measurements.
9.1 BGP Session Security Sizing Calculator
BGP Session Security Sizing
Calculate the number of BGP sessions, authentication key requirements, and max-prefix limit recommendations based on your deployment parameters.
9.2 Control-Plane Policing (CoPP) Rate Calculator
CoPP Rate Limit Calculator
Define per-class CoPP rate limits based on expected legitimate traffic volumes. The visualizer shows the relative allocation of CPU bandwidth across traffic classes.
9.3 Router Security Hardening Score
Security Hardening Score Calculator
Check the security controls implemented on your router to calculate an overall hardening score. Each control is weighted by its security impact.
9.4 ACL Capacity & TCAM Planner
ACL Capacity & TCAM Planner
Estimate ACL entry counts and TCAM utilization based on your network segmentation design. Helps identify when TCAM capacity may become a constraint.
9.5 Cryptographic Key Lifecycle Planner
Cryptographic Key Lifecycle Planner
Plan key rotation schedules for BGP authentication keys, SSH host keys, and HTTPS certificates. Calculates rotation workload and generates a 12-month calendar view.