Enabling A Track To Log Changes - HP 7102dl - ProCurve Secure Router Configuration Manual

Network Monitoring
Configuring Network Monitoring
A dampening interval configures a track to delay its state change in response
to its probes' state changes. For example, a dampening interval of 10 seconds
forces a track to stay in the Pass state for 10 seconds after the associated probe
fails. In effect, this interval delays a track from removing a monitored route
(or creating a log). If the probe (or probes) again changes state before the
dampening interval expires, the track will not take action at all. Thus the
dampening interval prevents rapid fluctuations in the routing table and excess
logs. (Remember that the dampening interval applies to all state changes—
Fail to Pass as well as Pass to Fail.)
You should configure a dampening interval when you have found that a probe
sometimes returns false positives (that is, fails without due cause) or when
the consequences of the track taking the wrong action are more serious then
the consequences of delaying the action slightly.
To specify a dampening interface, from the network monitor track configura-
tion mode context, enter:
Syntax: dampening-interval <seconds>
You can set the interval from 1 to 4,294,967,295 seconds. The default setting
is 1 second.

Enabling a Track to Log Changes

You can enable a track to create a log every time that its state changes, alerting
you to changing network conditions. Enabling logs is a good idea both for
tracks that monitor routes and tracks that do not monitor routes.
For tracks that monitor routes, logging changes lets you know when a network
becomes unavailable and when a route is removed.
For tracks that monitor server or network performance, the logged changes
are the primary purpose of the track. When a track monitors a particular
remote server's performance, you may not want it to remove a route based on
its findings. The fact that one server in a destination network is experiencing
a problem does not mean that all servers in that network are. Instead, you
want to track when problems occur. The log-changes command allows you to
do so.
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