Network Router User Manual

6-7
Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
Chapter 6 Configuring VOA Module Interfaces
Configuring Optical Receive Power Thresholds
Configuring Optical Receive Power Thresholds
TheVOA modules have optical receive power thresholds monitored by the Cisco ONS 15530 chassis.
This section describes four types of alarm threshold configuration procedures:
• Low Power Alarm
• Low Power Warning
• High Power Warning
• High Power Alarm
Low power warnings are raised when the received optical power drifts too close to LOL (loss of light).
Low power alarms show a critical condition of LOL. High power warnings are raised when the received
optical power drifts too close to high power alarm conditions. High power alarm are raised when
received optical power exceeds the receiver saturation threshold.
To configure power thresholds on VOA module interfaces, perform the following steps, beginning in
global configuration mode:
Displaying the Optical Threshold Configuration
To display the configuration of an optical threshold for a VOA interface, use the following EXEC
commands:
Command Purpose
Step 1
Switch(config)# interface {voafilterin
slot/subcard/port.subinterface |
voain slot/subcard/port}
Selects the VOA interface to configure and enters
interface configuration mode.
Step 2
Switch(config-if)# optical threshold power
receive after-attenuation {low | high} {alarm |
warning} value [severity {critical | major |
minor | not alarmed | not reported}]
Specifies the threshold value in units of 0.1 dBm.
The default values are as follows:
Low alarm: –29 dBm
Low warning: –27 dBm
High warning: 9 dBm
High alarm: 11 dBm
Alarm severity: major
Warning severity: not alarmed
Command Purpose
show interfaces {voafilterin
slot/subcard/port.subinterface | voain
slot/subcard/port}
Displays the VOA module interface configuration.