Juniper Networks J-Series manual Configuring RPM Probes, RPM Terms

Chapter 14

Configuring RPM Probes

	J-series Services Routers support a tool that allows network operators and their
	customers to accurately measure the performance between two network endpoints.
	With the real-time performance monitoring (RPM) feature, you configure and send
	probes to a specified target and monitor the analyzed results to determine packet
	loss, round-trip time, and jitter.
	This chapter contains the following topics. For more information about RPM, see the
	JUNOS Services Interfaces Configuration Guide.
	■ RPM Terms on page 267
	■ RPM Overview on page 268
	■ Before You Begin on page 271
	■ Configuring RPM with Quick Configuration on page 271
	■ Configuring RPM with a Configuration Editor on page 276
	■ Verifying an RPM Configuration on page 285
RPM Terms
	Before configuring and monitoring RPM on J-series Services Routers, become familiar
	with the terms defined in Table 138 on page 267.
Table 138: RPM Terms
Term	Definition
egress	Outbound. Characterizing packets exiting a Services Router.
ingress	Inbound. Characterizing packets entering a Services Router.
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 tool that measures the performance of a network between two endpoints by collecting
monitoring (RPM)	statistics on packet loss, round-trip time, and jitter.

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