C
HAPTER
5
| Interface Configuration
Port Configuration
– 167 –
The threshold value for Rx and Tx power is calculated as the power
ratio in decibels (dB) of the measured power referenced to one
milliwatt (mW).
Threshold values for alarm and warning messages can be configured as
described below.
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A high-threshold alarm or warning message is sent if the current
value is greater than or equal to the threshold, and the last sample
value was less than the threshold. After a rising event has been
generated, another such event will not be generated until the
sampled value has fallen below the high threshold and reaches the
low threshold.
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A low-threshold alarm or warning message is sent if the current
value is less than or equal to the threshold, and the last sample
value was greater than the threshold. After a falling event has been
generated, another such event will not be generated until the
sampled value has risen above the low threshold and reaches the
high threshold.
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Threshold events are triggered as described above to avoid a
hysteresis effect which would continuously trigger event messages
if the power level were to fluctuate just above and below either the
high threshold or the low threshold.
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Trap messages configured by this command are sent to any
management station configured as an SNMP trap manager using the
Administration > SNMP (Configure Trap) page.
WEB INTERFACE
To configure threshold values for optical transceivers:
1. Click Interface, Port, Transceiver.
2. Select a port from the scroll-down list.
3. Set the switch to send a trap based on default or manual settings.
4. Set alarm and warning thresholds if manual configuration is used.
5. Click Apply.
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