IBM 2109 Service Guide - Page 70

Threshold behavior models, Range threshold, Rising or falling threshold

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Page 70 highlights

| v Locking of the port log to preserve the relevant information | The service representative can deploy Fabric Watch as shipped, or you can | customize your configuration profile using the "fwConfigure command" on page 59. | Threshold behavior models | There are three behavior models for thresholds: range, rising or falling, and change | monitor. | Range threshold | A range threshold tracks whether a fabric element is within a specified range. It | includes a minimum and maximum boundary for the area, with buffer zones to | prevent repeated events due to oscillation of the value over a threshold boundary. If | the value exceeds the low- or high- threshold boundary, an event is generated. It | can also generate events while the value is outside the limits or when it re-enters | the prescribed range. | Temperature as an example of a range threshold is illustrated in Figure 23. | | SJ000107 | | Figure 23. Example of range threshold: temperature (Celsius) | | Rising or falling threshold | A rising or falling threshold tracks whether an element is on the desired side of a | boundary. It includes an upper and lower boundary, and the buffer zones are always | zero. Events can be selected for transitions between the boundaries. Rising or | falling thresholds are typically used for rate-based counters. | An error counter as a rising or falling threshold is illustrated in Figure 24 on | page 55. | 54 IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide

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v
Locking of the port log to preserve the relevant information
The service representative can deploy Fabric Watch as shipped, or you can
customize your configuration profile using the “fwConfigure command” on page 59.
Threshold behavior models
There are three behavior models for thresholds: range, rising or falling, and change
monitor.
Range threshold
A range threshold tracks whether a fabric element is within a specified range. It
includes a minimum and maximum boundary for the area, with buffer zones to
prevent repeated events due to oscillation of the value over a threshold boundary. If
the value exceeds the low- or high- threshold boundary, an event is generated. It
can also generate events while the value is outside the limits or when it re-enters
the prescribed range.
Temperature as an example of a range threshold is illustrated in Figure 23.
Rising or falling threshold
A rising or falling threshold tracks whether an element is on the desired side of a
boundary. It includes an upper and lower boundary, and the buffer zones are always
zero. Events can be selected for transitions between the boundaries. Rising or
falling thresholds are typically used for rate-based counters.
An error counter as a rising or falling threshold is illustrated in Figure 24 on
page 55.
SJ000107
Figure 23. Example of range threshold: temperature (Celsius)
54
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