350-401 Question 211
Select 3A network administrator is troubleshooting a connectivity issue between two routers, R1 and R2, in a large enterprise network. The routers are connected via an Ethernet link, and the administrator suspects that a routing protocol misconfiguration might be the cause. Which of the following tools should the administrator use to diagnose the issue effectively?
- A
Ping to verify connectivity between R1 and R2
- B
Traceroute to trace the path between R1 and R2
- C
Conditional debug on R1 to monitor the routing protocol updates
- D
SNMP to retrieve detailed hardware statistics from R1 and R2
- E
Syslog to review past log messages for any routing-related errors
Show answer and explanation
Correct answers: A, C, E
Explanation
To diagnose a suspected routing protocol misconfiguration, it is essential to verify connectivity first using Ping, monitor the routing protocol's behavior in real-time using conditional debug, and review historical data for any relevant errors in Syslog. Traceroute and SNMP, while useful in different scenarios, are not as effective for diagnosing this specific problem.
- A. Correct.
Ping is a fundamental tool to verify basic connectivity between two devices, which is essential to ensure that the link is up before proceeding with further diagnostics.
- B. Incorrect.
Traceroute is useful for identifying the path taken by packets through the network, but in this case, it is less relevant as the issue is suspected to be related to a routing protocol misconfiguration between directly connected routers.
- C. Correct.
Conditional debug allows the administrator to filter and monitor specific routing protocol messages, providing insights into any misconfigurations or issues with protocol negotiations.
- D. Incorrect.
SNMP is typically used to collect performance and hardware data from devices. While useful in many scenarios, it is not directly relevant for diagnosing a routing protocol misconfiguration.
- E. Correct.
Syslog provides historical logs that may contain error messages or warnings related to the routing protocol, helping to identify the root cause of the misconfiguration.