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Limitations of RPM on EX Series Switches
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Documentation
Configuring Real-Time Performance Monitoring (RPM)
Copyright © 2010, Juniper Networks, Inc.
NOTE: For correct one-way measurement, the clocks of the requester and
responder must be synchronized. If the clocks are not synchronized, one-way
jitter measurements and calculations can include significant variations, in
some cases orders of magnitude greater than the round-trip times.
When you enable one-way timestamps in a probe, the following one-way measurements
are reported:
Minimum, maximum, standard deviation, and jitter measurements for egress and
ingress times
Number of probes sent
Number of probe responses received
Percentage of lost probes
Two-Way Active Measurement Protocol (TWAMP) is not supported on EX Series
switches.
EX Series switches do not support user-configured class-of-service (CoS) classifiers
or prioritization of RPM packets over regular data packets received on an input interface.
Timestamps:
If the responder does not support hardware timestamps, RPM can only report the
round-trip measurements and cannot calculate round-trip jitter.
EX Series switches do not support hardware timestamps for HTTP and TCP probes.
Timestamps apply only to IPv4 traffic.
For further details about RPM, see the Junos OS Services Interfaces Configuration Guide
at
http://www.juniper.net/techpubs/software/junos/index.html
Configuring the Interface for RPM Timestamping for Client/Server on an EX Series
Switch (CLI Procedure) on page 3711
Configuring Real-Time Performance Monitoring (J-Web Procedure) on page 3704
Configuring SNMP (J-Web Procedure) on page 3603
Monitoring Network Traffic Using Traceroute on page 3815
Configuring Real-Time Performance Monitoring (J-Web Procedure) on page 3704
Configuring the Interface for RPM Timestamping for Client/Server on an EX Series
Switch (CLI Procedure) on page 3711
Chapter 130: Real-Time Performance Monitoring (RPM)
.
3703
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