AI Security Guide

AI + Identity: NAC Coverage, Drift Detection, and ISE Visibility

By Digvijay Parmar · AI Security & Zero Trust Architect · Last updated 2026-08-01

Identity-aware access fails quietly when 802.1X/MAB coverage is incomplete or switches drift between scans. Digvijay Parmar built an enterprise NAC Coverage Assurance and Endpoint Visibility Platform for Cisco ISE environments that measures organization-wide coverage, detects drift, and profiles endpoints — and he integrates ISE into AI investigation workflows.

Buyer question: How do I use AI and identity tooling to prove NAC coverage and catch configuration drift?

Why do identity programs need coverage math, not dashboards alone?

“NAC is deployed” is not a coverage number. Digvijay’s NAC Coverage Assurance platform measures real 802.1X/MAB coverage across switchports, applies eligibility logic, detects drift between scans, and profiles endpoints — so Zero Trust identity claims are verifiable.

CISOs often hear that “NAC is deployed” while large fractions of switchports remain in monitor mode, fail open, or sit outside eligibility logic. Without continuous measurement of 802.1X and MAB coverage — and without drift detection between scheduled scans — Zero Trust identity claims are unverifiable.

Digvijay built a NAC Coverage Assurance and Endpoint Visibility Platform for Cisco ISE and switch environments. It measures organization-wide 802.1X/MAB coverage, identifies ports missing NAC controls with intelligent eligibility logic, detects configuration drift between scans, and provides endpoint visibility via MAC/vendor profiling with dashboard and email reporting.

Where does AI belong in identity and NAC?

AI belongs where it correlates ISE authorization logs with firewall policy and routing to explain access success/failure — Digvijay’s investigation pattern that cut diagnostic latency 75%. It does not replace ISE design or ACS-to-ISE migration discipline.

AI adds leverage when it correlates ISE authorization logs with firewall policy and routing to explain why access succeeded or failed — the same pattern Digvijay uses in the AI-Driven Security Investigation Platform. It does not replace ISE design or ACS-to-ISE migration discipline; Digvijay has completed Cisco ACS to Cisco ISE migrations and integrated Cisco ISE for automated remediation.

Buyers should ask for both: a coverage measurement story and an AI investigation story. Coverage without investigation leaves you blind during incidents. Investigation without coverage leaves you automating guesses on an incomplete estate.

What eligibility logic should NAC reporting include?

Exclude ports that should not count toward coverage — AP ports, uplinks, infra links, specific VLANs, 25G/100G, custom exclusions — so reporting reflects ports that genuinely require enforcement. Digvijay’s platform encodes that eligibility logic explicitly.

Inflated coverage percentages are worse than no metric: they create false confidence. Digvijay’s approach highlights gaps on eligible ports only, so remediation queues are honest.

For example patterns discussed in his consulting materials: if 22,000 ports are eligible and 21,000 are covered, the remaining 1,000 are the real security work — not noise from uplink interfaces.

• Define eligible access ports with explicit exclusions.
• Measure 802.1X/MAB enforcement continuously.
• Diff scheduled scans for drift.
• Feed ISE logs into AI investigation for Zero Trust validation.

What is the starting point for security leaders?

Bring one identity or NAC question to a free Agentic AI Standup: coverage gaps, drift noise, or ISE log correlation. You receive a written summary in 24 hours. Service scope: AI Identity Management Consulting.

Bring one identity or NAC question to a free Agentic AI Standup: coverage gaps, drift noise, or ISE log correlation. You receive a written summary in 24 hours.

For service scope, see AI Identity Management Consulting. This guide is the buyer checklist for coverage and AI visibility.

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

What is NAC coverage assurance?

It is the practice of measuring real 802.1X/MAB enforcement across switchports, flagging missing controls with eligibility logic, and detecting drift between scans — as implemented in Digvijay’s NAC Coverage Assurance platform for Cisco ISE.

How does AI help with Cisco ISE?

AI correlates ISE authorization logs with firewall and routing data to automate investigation and validate identity-aware segmentation, which Digvijay does in production-shaped investigation workflows at Point72.

Do you handle ACS-to-ISE migrations?

Yes. Digvijay has completed Cisco ACS to Cisco ISE migrations and holds Cisco Security Core and CCNA/CCNP credentials relevant to that work.

Why does eligibility logic matter for NAC metrics?

Without excluding uplinks, AP ports, and infra links, coverage percentages inflate and hide real gaps. Digvijay’s platform uses intelligent eligibility logic so reporting reflects ports that genuinely require enforcement.

Can NAC coverage work support Zero Trust audits?

Yes. Auditable coverage numbers, drift history, and identity-aware investigation evidence turn “NAC is deployed” into a control you can prove — the standard Digvijay builds for financial-sector environments.

Related

Consulting: ai identity management consulting AI Security Consulting Buyer's Guide Zero Trust AI Validation Guide All AI security guides

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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.