Probe Characteristics - HP 7102dl - ProCurve Secure Router Configuration Manual

Network Monitoring
Overview
9-4

Probe Characteristics

A probe is defined by these configurable characteristics:
period—specifies the frequency at which the probe runs a test (that is,
transmits a probe packet), for example, every 60 seconds
tolerance—determines how many tests must fail before a probe as a whole
is considered to have failed
timeout—the length of time before a test is considered to have failed; for
example, a probe ping packet might have 500 milliseconds in which to
reach its destination and return
packet type—ICMP echo (ping), TCP connect, or HTTP request packets
destination—the IP address or hostname to which probe packets are
transmitted
source—the source IP address for probe packets
Depending on the probe's type, you can define other characteristics for probe
packets.
For ICMP echo packets, you can define:
packet size
data pattern
For TCP connect packets, you can define the source port in addition to the
source address. You must define the destination TCP port.
ICMP echo packets either do or do not successfully reach their destination
and return. Similarly, TCP connect packets either do or do not successfully
open a session. HTTP request probes, on the other hand, can collect various
types of information, determining success or failure based on the information
returned. Therefore, you can define many characteristics for HTTP request
packets, including:
the type of packet (Get, Head, or Raw)
for raw packets, a command string
an expected status in the response packet
an expected string in the response packet
the Web server's root path
the source port
You will learn more about configuring these options in "Configuring Probes"
on page 9-11.