Question 500
A campus and branch network operator reports: A wired BYOD onboarding flow succeeds in the lab but fails at campus access switches because their redirect ACL points to an obsolete ISE portal FQDN. What is the key technical principle in this situation?
Explanation
Correct Answer
Wired BYOD relies on NAD-mediated redirect and restricted bootstrap connectivity just as wireless onboarding does. This behavior directly governs the stated requirement. The recommended action is: Correct the switch's supported redirection attributes, DNS access, and portal identity for the current ISE BYOD PSNs. The acceptance result is: An unregistered wired laptop reaches the current BYOD portal and enrolls without being allowed unrestricted preauth traffic.
Incorrect Answers
Configure a portal certificate chain and hostname that match the published onboarding FQDN. The repeat risk here is different: Test certificate issuance and policy mapping separately from initial portal login. A directly relevant preventive control is: Wired BYOD relies on NAD-mediated redirect and restricted bootstrap connectivity just as wireless onboarding does.
Run onboarding with the actual limited-access ACL and DNS view used by new devices. The repeat risk here is different: Test certificate issuance and policy mapping separately from initial portal login. A directly relevant preventive control is: Wired BYOD relies on NAD-mediated redirect and restricted bootstrap connectivity just as wireless onboarding does.
Resolve and verify the prior ownership and registration state through authorized endpoint management before allowing a new user to register it. The repeat risk here is different: Test certificate issuance and policy mapping separately from initial portal login. A directly relevant preventive control is: Wired BYOD relies on NAD-mediated redirect and restricted bootstrap connectivity just as wireless onboarding does.