Configuring Real-Time Performance Monitoring (J-Web Procedure) - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos

Configuring Real-Time Performance Monitoring (J-Web Procedure)

3704
®
OS for EX Series Ethernet Switches, Release 10.3
Real-time performance monitoring (RPM) in EX Series switches enables you to configure
and send probes to a specified target and monitor the analyzed results to determine
packet loss, round-trip time, and jitter. Jitter is the difference in relative transit time
between two consecutive probes. You can set up probe owners and configure one or
more performance probe tests under each probe owner.
The ways in which you can use RPM include:
Monitor time delays between devices.
Monitor time delays at the protocol level.
Set thresholds to trigger SNMP traps when threshold values are exceeded. You can
configure thresholds for round-trip time, ingress or egress delay, standard deviation,
jitter, successive lost probes, and total lost probes per test.
Determine automatically whether a path exists between a host switch and its configured
Border Gateway Protocol (BGP) neighbors. You can view the results of the discovery
using an SNMP client.
Use the history of the most recent 50 probes to analyze trends in your network and
predict future needs.
Probes collect packets per destination and per application, including PING Internet Control
Message Protocol (ICMP) packets, User Datagram Protocol and Transmission Control
Protocol (UDP/TCP) packets with user-configured ports, user-configured Differentiated
Services code point (DSCP) type-of-service (ToS) packets, and Hypertext Transfer
Protocol (HTTP) packets.
EX Series switches support the following tests and probe types:
Ping tests:
ICMP echo
ICMP timestamp
HTTP tests:
HTTP get (not available for BGP RPM services)
UDP and TCP tests with user-configured ports:
UDP echo
TCP connection
UDP timestamp
To account for latency in the communication of probe messages, you can enable
timestamping of the probe packets. You should configure both the requester and the
responder to timestamp the RPM packets. The RPM features provides an additional
configuration option to set one-way hardware timestamps. Use one-way timestamps
Copyright © 2010, Juniper Networks, Inc.