Extreme Networks EPICenter Guide Manual page 55

A Rising Threshold means that a trap is generated when the value of the RMON variable increases
●
past the threshold value. If only a Rising threshold is specified, then no trap is generated if the value
decreases past the threshold.
A Falling Threshold means that a trap is generated when the value of the RMON variable decreases
●
past the threshold value. If only a Falling threshold is specified, then no trap is generated if the
value increases past the threshold.
If you want a trap event to occur for both Rising and Falling threshold conditions, you can specify both
thresholds.
There are other SNMP traps supported by the EPICenter Alarm System, but not included in the
threshold configuration function, that may require conditions to be set on the switch to define when a
trap should occur. See Appendix B, "Configuring Devices for Use with EPICenter" in the EPICenter
Reference Guide for additional information.
NOTE
Creating the rules that control trap (event) generation is only the first of the two steps required to create EPICenter
alarms for these events. Even though you have set up these rules, the trap events generated as a result will be
ignored by the Alarm System until you define alarms that take actions on those events. See
an Alarm Definition" on page 47
There are two parts to an event rule; the rule configuration itself, and the association of the rule to its
target devices.
NOTE
CPU Utilization is only supported on switches running ExtremeWare 6.2 or later. STP Topology change traps are only
supported on switches running ExtremeWare 6.2.2 or later.
A new RMON rule is added as a new "folder" in the Configuration Tree, and each target device for the
rule appears as a separate component under that rule. The rule name will also appear in the Event
Name list.
For CPU Utilization rules, each target device for a CPU utilization rule appears as a separate component
under the CPU Utilization "folder" in the Configurations tree.
Startup Alarm: The condition that should be met to cause the initial occurrence of this event. Select
●
from the following:
Rising: an event will be generated the first time the sample value becomes greater than or equal
■
to the Rising Threshold value. No events will be generated related to the Falling threshold until
after this has occurred.
Falling: an event will be generated the first time the sample value becomes less than or equal to
■
the Falling Threshold value. No events will be generated related to the Rising threshold until
after this has occurred.
RisingOrFalling: an event will be generated the first time the sample value becomes either
■
greater than or equal to the Rising Threshold value, or less than or equal to the Falling Threshold
value.
EPICenter Concepts and Solutions Guide
for more information.
Using the EPICenter Alarm System
"Creating or Modifying
55