The RPM information includes the round-trip time, jitter, and standard deviation values for each configured RPM test on the Services Router. To view these RPM properties, select Monitor>RPM in the J-Web interface, or enter the following CLI show command:
- show services rpm probe-results
In addition to the RPM statistics for each RPM test, the J-Web interface displays the round-trip times and cumulative jitter graphically. Figure 1 shows sample graphs for an RPM test.
Figure 1: Sample RPM Graphs
In Figure 1, the round-trip time and jitter values are plotted as a function of the system time. Large spikes in round-trip time or jitter indicate a slower outbound (egress) or inbound (ingress) time for the probe sent at that particular time.
Table 68 summarizes key output fields in RPM displays.
Table 68: Summary of Key RPM Output Fields
Field |
Values |
Additional Information |
---|---|---|
Currently Running Tests | ||
Graph |
Click the Graph link to display the graph (if it is not already displayed) or to update the graph for a particular test. |
|
Owner |
Configured owner name of the RPM test. |
|
Test Name |
Configured name of the RPM test. |
|
Probe Type |
Type of RPM probe configured for the specified test. Following are valid probe types:
|
|
Target Address |
IP address or URL of the remote server that is being probed by the RPM test. |
|
Source Address |
Explicitly configured source address that is included in the probe packet headers. |
If no source address is configured, the RPM probe packets use the outgoing interface as the source address, and the Source Address field is empty. |
Minimum RTT |
Shortest round-trip time from the Services Router to the remote server, as measured over the course of the test. |
|
Maximum RTT |
Longest round-trip time from the Services Router to the remote server, as measured over the course of the test. |
|
Average RTT |
Average round-trip time from the Services Router to the remote server, as measured over the course of the test. |
|
Standard Deviation RTT |
Standard deviation of round-trip times from the Services Router to the remote server, as measured over the course of the test. |
|
Probes Sent |
Total number of probes sent over the course of the test. |
|
Loss Percentage |
Percentage of probes sent for which a response was not received. |
|
Round-Trip Time for a Probe | ||
Samples |
Total number of probes used for the data set. |
The Services Router maintains records of the most recent 50 probes for each configured test. These 50 probes are used to generate RPM statistics for a particular test. |
Earliest Sample |
System time when the first probe in the sample was received. |
|
Latest Sample |
System time when the last probe in the sample was received. |
|
Mean Value |
Average round-trip time for the 50–probe sample. |
|
Standard Deviation |
Standard deviation of the round-trip times for the 50–probe sample. |
|
Lowest Value |
Shortest round-trip time from the device to the remote server, as measured over the 50–probe sample. |
|
Time of Lowest Sample |
System time when the lowest value in the 50–probe sample was received. |
|
Highest Value |
Longest round-trip time from the Services Router to the remote server, as measured over the 50–probe sample. |
|
Time of Highest Sample |
System time when the highest value in the 50–probe sample was received. |
|
Cumulative Jitter for a Probe | ||
Samples |
Total number of probes used for the data set. |
The Services Router maintains records of the most recent 50 probes for each configured test. These 50 probes are used to generate RPM statistics for a particular test. |
Earliest Sample |
System time when the first probe in the sample was received. |
|
Latest Sample |
System time when the last probe in the sample was received. |
|
Mean Value |
Average jitter for the 50-probe sample. |
|
Standard Deviation |
Standard deviation of the jitter values for the 50-probe sample. |
|
Lowest Value |
Smallest jitter value, as measured over the 50-probe sample. |
|
Time of Lowest Sample |
System time when the lowest value in the 50-probe sample was received. |
|
Highest Value |
Highest jitter value, as measured over the 50-probe sample. |
|
Time of Highest Sample |
System time when the highest jitter value in the 50-probe sample was received. |
For more information about the J-Web Monitor task, see Monitor Tasks.