Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2Network AssuranceMedium
A network engineer is troubleshooting a persistent issue where users in a specific VLAN intermittently experience slow application performance when accessing a server in another VLAN. The engineer suspects a routing loop or asymmetric routing. Which network assurance technology can provide the necessary hop-by-hop path visibility and latency measurements to pinpoint the problem?
- ANetFlow
- BIP SLA Path Echo
- CSyslog
- DSNMP
Show answer & explanationAnswer & explanation
Correct answer: B. IP SLA Path Echo
IP SLA Path Echo operations (like ICMP Path Echo) can trace the full path between a source and destination, providing hop-by-hop latency and identifying potential routing anomalies like loops or asymmetric paths by showing the actual route taken.
Why the other options are wrong
- A. NetFlow provides traffic flow statistics but does not offer hop-by-hop path tracing or latency for a specific path.
- C. Syslog provides event logs, not path tracing or latency measurements.
- D. SNMP monitors device resources and status, not end-to-end path performance or routing paths.
IP SLA Path Echo
IP SLA Path Echo is an operation that sends a sequence of ICMP echo messages to trace the network path between a source and destination, measuring round-trip time and providing hop-by-hop latency statistics.
- Uses ICMP echo messages similar to traceroute but with more detailed metrics.
- Provides hop-by-hop latency and path information.
- Useful for diagnosing routing loops, asymmetric routing, and path performance issues.
Memory trick: IP SLA Path Echo: Inspect Paths, Pinpoint Problems, Precisely.