300-440 Question 289
Single answerA network administrator is troubleshooting a branch office connectivity issue using Cisco DNA Center Assurance. The branch router is showing as 'unreachable,' and several users are reporting intermittent connectivity. The administrator uses the Connectivity tab in Cisco DNA Center Assurance and identifies a high number of packet drops on the interface connecting the branch router to the core network. Which action should the administrator take next to resolve the issue?
- A
Check the interface statistics on the branch router to identify potential hardware issues.
- B
Reboot the branch router to clear any potential software faults.
- C
Modify the QoS policies on the branch router to prioritize critical traffic.
- D
Use Cisco DNA Center's Path Trace feature to identify the exact point of failure in the network.
Show answer and explanation
Correct answer: A
Explanation
When troubleshooting connectivity issues in Cisco DNA Center Assurance, it is essential to address the root cause of the observed problem. In this scenario, the observed high packet drop rate on the interface suggests a hardware, configuration, or physical layer issue. Checking the interface statistics is the most logical next step to diagnose and resolve the problem.
- A. Correct.
This is the correct answer. High packet drops on the interface indicate potential hardware or configuration issues. Checking the interface statistics will help identify issues such as CRC errors, input errors, or duplex mismatches.
- B. Incorrect.
Rebooting the router is not a recommended first step in this scenario, as it does not directly address the observed issue and could disrupt network operations further.
- C. Incorrect.
Modifying QoS policies is not relevant to the immediate issue of packet drops on the interface, as QoS does not resolve physical or hardware-level problems.
- D. Incorrect.
While the Path Trace feature can help identify broader connectivity issues, the problem here is specific to packet drops on the branch router's interface, which requires checking interface-level statistics first.