Question

A network engineer configures an IP SLA UDP jitter operation between R1 (sender) and R2 (responder) to monitor a VoIP path. The operation runs successfully and reports jitter and round-trip-time values, but the 'show ip sla statistics' output on R1 consistently shows 'Number of successes: 60, Number of failures: 0' while the one-way latency (Latency one-way (SD)) fields all display 0 ms. The engineer needs accurate one-way delay measurements for SLA reporting. What is the most likely cause?

Accepted Answer

The clocks on R1 and R2 are not synchronized with NTP, so one-way delay cannot be reliably computed.

Answer

The IP SLA responder is not configured on R2, so only round-trip metrics can be calculated.

Answer

The UDP jitter operation frequency is set too low, preventing enough samples for one-way calculations.

Answer

The 'precision microseconds' option is missing, so one-way delay defaults to zero.