Question 60
A campus network engineer reports the following condition: Managed laptops present certificates during wireless 802.1X, but Cisco ISE rejects every certificate after a new enterprise CA was introduced. Which remediation most directly corrects the reported policy or access problem?
Explanation
Correct Answer
The underlying cause is: EAP-TLS depends on ISE trusting the issuing CA and validating the presented client certificate chain and usage before granting authentication. The correct response is: Import the approved CA trust chain for client authentication and align the EAP-TLS certificate authentication profile with the intended identity mapping. Confirm by checking: A known managed certificate succeeds while a certificate from an untrusted issuer is still rejected with a clear authentication failure reason.
Incorrect Answers
That intervention addresses peap mschapv2 directory credential validation, where PEAP inner credential authentication and EAP-TLS certificate authentication are different method flows, and an allowed protocol set must match the approved supplicants. Here, the relevant failure is instead: EAP-TLS depends on ISE trusting the issuing CA and validating the presented client certificate chain and usage before granting authentication.
That intervention addresses active directory join for identity lookup, where ISE nodes require a functioning relationship to the intended Active Directory identity source, including reachability, name resolution, and a healthy domain join. In this question the necessary remedy is “Import the approved CA trust chain for client authentication and align the EAP-TLS certificate authentication profile with the intended identity mapping”, which this alternative does not provide.
That intervention addresses ldap identity source secure bind, where An LDAP identity store requires a supported connection and bind configuration, appropriate directory credentials, and trust for encrypted transport where configured. The observed condition is managed laptops present certificates during wireless 802.1X, but Cisco ISE rejects every certificate after a new enterprise CA was introduced; this mechanism addresses another problem.