Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2Network AssuranceHard
A network engineer is analyzing performance degradation on specific network links. They need to monitor one-way delay, one-way jitter, and one-way packet loss for UDP traffic between two routers. Which IP SLA operation type, along with its specific configuration, would provide these detailed one-way metrics?
- AUDP Jitter with a `source-ip` and `target-ip` configuration
- BICMP Echo with `threshold` configuration
- CHTTP operation with `timeout` and `interval`
- DTCP Connect with `port` and `source-ip`
Show answer & explanationAnswer & explanation
Correct answer: A. UDP Jitter with a `source-ip` and `target-ip` configuration
The UDP Jitter operation is specifically designed to measure one-way and two-way latency, jitter, and packet loss for UDP traffic. When configured with both a `source-ip` (on the initiator) and a `target-ip` (on the responder), it can accurately calculate one-way metrics, which is crucial for identifying asymmetric network performance issues.
Why the other options are wrong
- B. ICMP Echo primarily measures Round-Trip Time (RTT); while thresholds can be set, it doesn't inherently provide one-way jitter or packet loss for UDP traffic.
- C. HTTP operations monitor web application performance and do not provide network-layer one-way jitter or packet loss metrics.
- D. TCP Connect operations monitor the time it takes to establish a TCP connection and do not provide one-way latency, jitter, or packet loss for UDP traffic.
IP SLA One-Way Measurements
The ability of certain IP SLA operations (like UDP Jitter) to measure performance metrics (latency, jitter, packet loss) in each direction independently, requiring an initiator and a responder.
- Crucial for identifying asymmetric network issues.
- Requires an IP SLA responder on the target device.
- UDP Jitter is a primary operation for one-way metrics.
Memory trick: One-way UDP Jitter needs two ends, to measure each path, where the data extends.