350-401 Question 603
Single answerA network administrator is troubleshooting an SNMP issue on a Cisco router. The SNMP manager is unable to retrieve device information using SNMPv3, but SNMPv2c queries are working correctly. Upon checking the configuration, the administrator observes the following snippet:
snmp-server group ADMIN v3 auth snmp-server user ADMIN_USER ADMIN v3 auth md5 admin123
What could be the reason the SNMPv3 queries are failing?
- A
The SNMPv3 user is not configured for encryption.
- B
The SNMPv3 user is configured with an incorrect authentication protocol.
- C
The SNMP manager is not using the correct SNMPv3 credentials.
- D
The SNMPv3 group does not have read access to the necessary MIBs.
Show answer and explanation
Correct answer: C
Explanation
SNMPv3 requires the SNMP manager to use the correct username, authentication protocol, and password to successfully communicate with the SNMP agent. In this scenario, the failure is likely due to a mismatch in the credentials configured on the SNMP manager and those on the device. The other options either do not align with the configuration provided or would not cause complete SNMPv3 query failure.
- A. Incorrect.
SNMPv3 encryption is optional when the user is configured with 'auth' level. Since the group and user are configured for 'auth' only, encryption is not required in this case.
- B. Incorrect.
The configuration shows the SNMPv3 user is correctly using 'auth' with MD5, which is a valid authentication protocol.
- C. Correct.
If the SNMP manager is not using the correct username (ADMIN_USER), password (admin123), or authentication protocol (MD5), it will fail to retrieve information using SNMPv3.
- D. Incorrect.
Read access permissions for the MIBs are not explicitly shown in the configuration snippet, but this issue would typically result in partial data retrieval rather than complete failure.