Specifications

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Cisco ONS 15216 EDFA2 Operations Guide
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Chapter 5 SNMP MIB Installation and Configuration
Retrieving Information
Changes must be saved before terminating the session. See the “Save Changes” section on page 4-11.
Loss of Output Power Alarm Hysteresis
LpoutHysteresis
Command: snmp attribute get local cerent15216EdfaLpoutHysteresis
Syntax: snmp attribute get local cerent15216EdfaLpoutHysteresis
Description: This attribute is not required when operating in factory default, constant gain mode.
Setting of the loss of output power alarm deviation is only necessary when the amplifier
is used in constant output power or constant pump power modes of operation.
This attribute is used to set the amount by which the output power must increase from the
threshold setpoint before the alarm is cleared. This attribute, in conjunction with the loss
of output power alarm threshold and deviation, enables efficient processing and clearing
of the alarm condition.
Typically, network operations personnel should set the loss of output power alarm
hysteresis at a value that is appropriate for the intended network application so that the
alarm condition is meaningful. Consult with Cisco Systems Engineer to determine the
hysteresis value for your application. As a guideline, Cisco recommends that loss of
output power alarm hysteresis value be set at 0.2 dBm. The module clears the alarm if it
detects a signal level of 0.2 dBm above the current output power alarm level threshold
value set for the amplifier.
When ONS 15216 EDFA2 is set to constant gain operation (factory default), the value for
loss of output power alarm threshold cannot be changed. To display the loss of output
power alarm deviation and other power and temperature alarm data, use the snmp Table
display local cerent15216EdfaCfgGroup command as shown in Example 5-12. This
command returns the current alarm threshold default values.
To set the loss of output power alarm hysteresis when Cisco ONS 15216 is configured for
operation in constant output power or constant pump power operation mode, type snmp
attribute set local cerent15216EdfaLpoutHysteresis at the command prompt followed
by a number. Valid entries are between 0 and 1000 and are in dBm times 100. For example,
if the loss of output power hysteresis required were 0.2 dBm, the number input as loss of
output power alarm hysteresis would be 200.
The user is prompted to modify the attribute. If changes are not required, press Enter to
return to command prompt.
Changes must be saved before terminating the session. See the “Save Changes” section on page 4-11.
AlarmEntry
Command: snmp Table display local cerent15216EdfaAlarmEntry
Syntax: snmp Table display local cerent15216EdfaAlarmEntry
Description: Accesses the alarm status. Example 5-22 shows the cerent15216EdfaAlarmEntry
display command.