An engineer is adding a new network device to be used with 802.1X authentication. After configuring the device, the engineer notices that no endpoints that connect to the switch are able to authenticate. What is the problem?
A.
The command dot1x system-auth-control is not configured on the switch.
B.
The switch’s supplicant is unable to establish a connection to Cisco ISE.
C.
The command dot1x critical vlan 40 is not configured on the switch ports.
D.
The endpoint firewalls are blocking the EAPoL traffic.
Based on the information given in the question, the most likely cause of the authentication failure is option - The command dot1x system-auth-control is not configured on the switch. This command enables 802.1X authentication globally on the switch and is required for the switch to function as an authenticator. Without this command, the switch will not initiate the authentication process with the endpoints.
denverfly's response is sound. I know this from experience. Devices will not authenticate through 802.1x without the global command on the switch. The question is asking why end points that connect to the switch are not able to authenticate making option A the only feasible answer.
agree with you I think it is something not related to the configuration because they sayed that the switch is configured, so I have an hesitation between B and D
upvoted 1 times
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denverfly
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