300-445 Question 222
Select 4Your organization has recently implemented a hybrid network architecture that includes MPLS circuits, VPN tunnels, and BGP routing for interconnecting branch offices and data centers. You are tasked with configuring network assurance alert rules to proactively detect issues. Which alert rules would be most appropriate to monitor the network conditions for potential issues like high latency, packet drops, or route instability?
- A
Configure an alert rule to monitor error counters on MPLS interfaces.
- B
Set up an alert rule based on TCP retransmission rates across VPN tunnels.
- C
Create an alert rule to detect BGP route table changes or flapping routes.
- D
Configure an alert rule to monitor CPU utilization on branch office routers.
- E
Set up an alert rule to analyze syslog messages for congestion-related warnings.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
The correct answers focus on configuring alert rules that directly address network conditions such as packet loss, congestion, and routing issues, which are critical in ensuring a stable and high-performing hybrid network. Monitoring error counters, TCP retransmissions, BGP route table behavior, and syslog messages provide comprehensive coverage for proactive issue detection. While CPU utilization is important, it is not directly tied to the network conditions mentioned in the question.
- A. Correct.
Monitoring error counters on MPLS interfaces helps detect link-level issues like packet loss or physical layer problems, which can severely impact performance.
- B. Correct.
High TCP retransmission rates across VPN tunnels indicate potential congestion or packet loss, which is critical for ensuring reliable application performance.
- C. Correct.
Frequent BGP route table changes or route flapping can lead to network instability and connectivity problems, making it essential to monitor for such anomalies.
- D. Incorrect.
While CPU utilization monitoring is useful for device health, it is not directly related to detecting network conditions like latency, congestion, or route instability.
- E. Correct.
Syslog messages often contain useful information about network congestion or warnings from devices, making it an important source for proactive alerting.