Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 776)

720 Brocade 6910 Ethernet Access Switch Configuration Guide
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Port Configuration
Parameters
These parameters are displayed:
• Port – Port number. (Range: 1-12)
• DDM Thresholds – Information on alarm and warning thresholds. The switch can be configured
to send a trap when the measured parameter falls outside of the specified thresholds.
• High Alarm – Sends an alarm message when the high threshold is crossed.
• High Warning – Sends a warning message when the high threshold is crossed.
• Low Warning – Sends a warning message when the low threshold is crossed.
• Low Alarm – Sends an alarm message when the low threshold is crossed.
The configurable ranges are:
• Temperature: -200.00-200.00 °C
• Voltage: 1.00-255.00 Volts
• Current: 1.00-255.00 mA
• Power: -99.99-99.99 dBm
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).
DDM Thresholds only apply to the transceiver vendor "BROCADE".
Threshold values for alarm and warning messages can be configured as described below.
• 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.
• 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.
• 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.
• 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.
Interface
To display identifying information and functional parameters for optical transceivers:
1. Click Interface, Port, Transceiver.
2. Select Configure DDM Thresholds from the Action list.
3. Select a port from the scroll-down list.
4. Set alarm and warning thresholds as required.
5. Click Apply.