Juniper Networks J-Series manual RPM Overview, RPM Probes, RPM target, RPM test, Test interval

J-series™ Services Router Administration Guide

Table 138: RPM Terms (continued)

Term	Definition
RPM target	Remote network endpoint, identified by an IP address or URL, to which the Services Router
	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.

RPM Overview

Real-time performance monitoring (RPM) allows you to perform service-level monitoring. When RPM is configured on a Services Router, the router calculates network performance based on packet response time, jitter, and packet loss. These values are gathered by Hypertext Transfer Protocol (HTTP) GET requests, Internet Control Message Protocol (ICMP) requests, and TCP and UDP requests, depending on the configuration.

This section contains the following topics:

■RPM Probes on page 268

■RPM Tests on page 269

■Probe and Test Intervals on page 269

■Jitter Measurement with Hardware Timestamping on page 269

■RPM Statistics on page 270

■RPM Thresholds and Traps on page 271

■RPM for BGP Monitoring on page 271

RPM Probes

You gather RPM statistics by sending out probes to a specified probe target, identified by an IP address or URL. When the target receives the probe, it generates responses, which are received by the Services Router. By analyzing the transit times to and from the remote server, the Services Router can determine network performance statistics.

The Services Router sends out the following probe types:

■HTTP GET request at a target URL

■HTTP GET request for metadata at a target URL

■ICMP echo request to a target address (the default)

■ICMP timestamp request to a target address

■UDP ping packets to a target device

■UDP timestamp requests to a target address

■TCP ping packets to a target device

268■ RPM Overview