RPM Terms

Before configuring and monitoring RPM, become familiar with the terms defined in Table 178.

Table 178: RPM Terms

Term	Definition
egress	Outbound. Characterizing packets exiting a device.
ingress	Inbound. Characterizing packets entering a device.
jitter	Difference in relative transmit time between two consecutive packets in a stream, which can cause quality degradation in some real-time applications such as voice over IP (VoIP) and video.
probe	An action taken or an object used to learn something about the state of the network. Real-time performance monitoring (RPM) uses several types of requests to probe a network.
probe interval	Time, in seconds, between probe packets.
real-time performance monitoring (RPM)	Monitoring tool that measures the performance of a network between two endpoints by collecting statistics on packet loss, round-trip time, and jitter.
RPM target	Remote network endpoint, identified by an IP address or URL, to which the device sends a real-time performance monitoring (RPM) probe.
RPM test	A collection of real-time performance monitoring (RPM) probes sent out at regular intervals.
test interval	Time, in seconds, between RPM tests.