350-401 Question 609
Select 3A network administrator is troubleshooting a connectivity issue in a branch office. They suspect a routing loop is causing excessive traffic. The administrator enabled debugging but found the output overwhelming due to high network activity. They decide to refine the debugging process using conditional debugs. Which of the following steps should the administrator take to troubleshoot effectively?
- A
Specify an interface to limit the debug output to traffic passing through it.
- B
Use an access control list (ACL) to filter debug messages for specific traffic.
- C
Enable timestamps on debug outputs to correlate events with network activity.
- D
Use a syslog server to offload debug messages for later analysis.
- E
Enable global debug for all processes to capture as much information as possible.
Show answer and explanation
Correct answers: A, B, C
Explanation
Conditional debugging allows administrators to focus on specific traffic, interfaces, or events, helping isolate issues more effectively without generating excessive debug output. Combining conditional debug methods, such as filtering with ACLs and enabling timestamps, ensures efficient troubleshooting while maintaining clarity in the output.
- A. Correct.
Specifying an interface for debugging reduces the scope of debug output, making it easier to focus on relevant traffic.
- B. Correct.
Using an ACL to filter debug messages allows the administrator to target specific traffic, such as packets between certain source and destination IPs.
- C. Correct.
Enabling timestamps adds context to debug messages, helping correlate events with the issue being investigated.
- D. Incorrect.
Using a syslog server is useful for centralizing logs but may not directly refine the debug output in real-time troubleshooting.
- E. Incorrect.
Enabling global debug for all processes can overwhelm the administrator with excessive information, making it harder to isolate the issue.