AI Security Guide
Case Study: NAC Coverage Assurance and 75% Faster Investigations
Digvijay Parmar built a NAC Coverage Assurance and Endpoint Visibility Platform for Cisco ISE that measures real 802.1X/MAB coverage, detects drift, and profiles endpoints — and correlates ISE authorization logs with firewall policy and routing in an AI investigation platform that cut diagnostic latency 75% (≈45 minutes to under 5) while validating Zero Trust segmentation in a financial-sector operating context.
Buyer question: What results come from combining Cisco ISE coverage assurance with AI investigation?
What identity problem was blocking Zero Trust proof?
Teams claimed NAC was deployed but could not quantify eligible vs protected ports or catch drift. Without coverage truth, Zero Trust identity claims were unverifiable and investigations stayed manual.
Digvijay’s coverage platform connects read-only to Cisco switches, applies eligibility logic (excluding uplinks, AP ports, infra links, and custom exclusions), and reports gaps with scan-to-scan drift detection and email summaries.
Where did AI investigation fit?
AI correlated Cisco ISE / NAC authorization logs with firewall policy and BGP/OSPF routing to automate investigation and validate microsegmentation — cutting time-to-answer on complex cases by 75%.
Coverage without investigation leaves you blind during incidents. Investigation without coverage automates guesses. Digvijay’s pattern combines both, including ACS-to-ISE migration experience and ISE-integrated remediation patterns from prior financial-sector engineering roles.
| Capability | Operating result |
|---|---|
| Coverage math | Eligible vs NAC-covered ports with honest exclusions |
| Drift detection | Scan-to-scan diffs before silent regressions become incidents |
| Endpoint visibility | MAC/OUI + switchport device profiling |
| AI investigation | 75% lower diagnostic latency on complex cases |
Why does this matter for audits and boards?
It turns “NAC is deployed” into a measurable control with evidence — coverage numbers, drift history, and investigation artifacts tied to policy and identity logs.
Financial-sector environments need that evidence trail. Digvijay’s consulting packages the same assurance and investigation lenses for estates still stuck in monitor-mode debt.
How do I start on my estate?
Bring one coverage, drift, or investigation-latency problem to a free Agentic AI Standup. Related: NAC & Cisco ISE Consulting and AI Identity Management Consulting.
A 40-minute working session produces a written diagnosis in 24 hours — enough to decide whether coverage assurance, ISE migration, or investigation automation is the first program.
What collaborators say
"Digvijay is conceptually and practically very sound in Cisco Technology. He is great in network troubleshooting as well, with a continuous thirst for progress and a superlative personality."
— Mukesh Pathak, Senior Infrastructure Engineer (Network & Security), Maersk
Frequently asked questions
- Is the 75% latency figure from NAC alone?
- It comes from Digvijay’s AI-Driven Security Investigation Platform that correlates firewall policy, Cisco ISE/NAC logs, and routing — often used together with coverage assurance for Zero Trust validation.
- Does this require a greenfield ISE deployment?
- No. Brownfield estates with monitor-mode debt and drift are the typical starting point for Digvijay’s coverage platform.
- Can this support ACS-to-ISE programs?
- Yes. Digvijay has completed Cisco ACS to Cisco ISE migrations as part of NAC consulting work.
Related
Bring one real problem. Leave with a direction.
The Agentic AI Standup is a free 40-minute working session. You bring one real AI security or Zero Trust problem; you leave with a diagnosis, two or three concrete recommendations, and a written summary in your inbox within 24 hours.
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