Monitor and troubleshoot
Documents under this category describe tools that can help you monitor, diagnose, and troubleshoot SR Linux software. This section also includes Log Event documentation to help you interpret log messages generated by SR Linux software.
- Event Handler Guide
  This document describes the functionality and configuration for the event handler framework on the Nokia Service Router Linux (SR Linux).
- Log Events Guide
  This document provides guidance for operators to interpret log events for the Nokia Service Router Linux (SR Linux).
- OAM and Diagnostics Guide
- Troubleshooting Toolkit
  This document describes how to use and configure diagnostic tools for the Nokia Service Router Linux (SR Linux).

linux

cpuUsageCritical

Table 1. cpuUsageCritical properties
Property name	Value
Application name	linux
Event name	cpuUsageCritical
Default severity	critical
Message format string	CPU utilization on component_type module slot is above 90% on average for the last minute, current usage cpu_usage_percentage%
Cause	Applications or other system tasks have consumed more than 90% of available CPU resources on average over the last minute.
Effect	Processes may be scheduled at a slower rate than required, resulting in potential application failures or slow downs.
Raising event	N/A
Clearing event	N/A

cpuUsageHigh

Table 2. cpuUsageHigh properties
Property name	Value
Application name	linux
Event name	cpuUsageHigh
Default severity	warning
Message format string	CPU utilization on component_type module slot is above 80% on average for the last minute, current usage cpu_usage_percentage%
Cause	Applications or other system tasks have consumed more than 80% of available CPU resources on average over the last minute.
Effect	No immediate effect, if utilization continues to increase, processes may be scheduled at a slower rate than required, resulting in potential application failures or slow downs.
Raising event	N/A
Clearing event	N/A

cpuUsageNormal

Table 3. cpuUsageNormal properties
Property name	Value
Application name	linux
Event name	cpuUsageNormal
Default severity	notice
Message format string	CPU utilization on component_type module slot is below 70% on average for the last minute, current usage cpu_usage_percentage%
Cause	CPU consumption on the specified slot has returned to normal levels - below 70%, after triggering a cpuUsageHigh/cpuUsageCritical event.
Effect	None.
Raising event	N/A
Clearing event	N/A

dateAndTimeChanged

Table 4. dateAndTimeChanged properties
Property name	Value
Application name	linux
Event name	dateAndTimeChanged
Default severity	notice
Message format string	System date and time changed to date_and_time
Cause	The system time has been changed either manually, or via NTP, to the specified time.
Effect	Local time on the system has changed.
Raising event	N/A
Clearing event	N/A

domainChanged

Table 5. domainChanged properties
Property name	Value
Application name	linux
Event name	domainChanged
Default severity	informational
Message format string	System domain name changed to domain_name
Cause	System configuration change to the domain name has been made.
Effect	The system uses the new domain name.
Raising event	N/A
Clearing event	N/A

hostnameChanged

Table 6. hostnameChanged properties
Property name	Value
Application name	linux
Event name	hostnameChanged
Default severity	informational
Message format string	System host name changed to host_name
Cause	System configuration change to the host name has been made.
Effect	The system uses the new host name.
Raising event	N/A
Clearing event	N/A

memoryUsageCritical

Table 7. memoryUsageCritical properties
Property name	Value
Application name	linux
Event name	memoryUsageCritical
Default severity	critical
Message format string	Memory utilization on component_type module slot is above 90%, current usage memory_usage_percentage%
Cause	Applications or other in-memory items have consumed more than 90% of the memory on the specified module.
Effect	No immediate effect, if utilization continues to increase, new memory allocations may fail, resulting in potential application failures.
Raising event	N/A
Clearing event	N/A

memoryUsageFull

Table 8. memoryUsageFull properties
Property name	Value
Application name	linux
Event name	memoryUsageFull
Default severity	emergency
Message format string	Memory utilization on component_type module slot is full
Cause	Applications or other in-memory items have consumed 100% of the memory on the specified module.
Effect	Further memory allocations will fail, likely leading to application failures and eventual module restart.
Raising event	N/A
Clearing event	N/A

memoryUsageHigh

Table 9. memoryUsageHigh properties
Property name	Value
Application name	linux
Event name	memoryUsageHigh
Default severity	warning
Message format string	Memory utilization on component_type module slot is above 70%, current usage memory_usage_percentage%
Cause	Applications or other in-memory items have consumed more than 70% of the memory on the specified slot.
Effect	No immediate effect, if utilization continues to increase, new memory allocations may fail, resulting in potential application failures.
Raising event	N/A
Clearing event	N/A

memoryUsageNormal

Table 10. memoryUsageNormal properties
Property name	Value
Application name	linux
Event name	memoryUsageNormal
Default severity	notice
Message format string	Memory utilization on component_type module slot is below 60%, current usage memory_usage_percentage%
Cause	Memory consumption on the specified slot has returned to normal levels - below 60%
Effect	None.
Raising event	N/A
Clearing event	N/A

partitionStateChange

Table 11. partitionStateChange properties
Property name	Value
Application name	linux
Event name	partitionStateChange
Default severity	alert
Message format string	Partition partition has changed state to current_state
Cause	The specified partition has transitioned to a new state.
Effect	Depending on the state, the partition may now be unusable, read-only, or read-write.
Raising event	N/A
Clearing event	N/A

partitionUsageCritical

Table 12. partitionUsageCritical properties
Property name	Value
Application name	linux
Event name	partitionUsageCritical
Default severity	critical
Message format string	Partition partition_label usage on component_type module slot is higher than 90%, current usage partition_usage_percentage%
Cause	The specified partition is almost full, and action should be taken to remove unneeded files.
Effect	None.
Raising event	N/A
Clearing event	N/A

partitionUsageFull

Table 13. partitionUsageFull properties
Property name	Value
Application name	linux
Event name	partitionUsageFull
Default severity	alert
Message format string	Partition partition_label on component_type module slot is full
Cause	The specified partition is full.
Effect	Write actions to this partition will fail.
Raising event	N/A
Clearing event	N/A

partitionUsageNormal

Table 14. partitionUsageNormal properties
Property name	Value
Application name	linux
Event name	partitionUsageNormal
Default severity	notice
Message format string	Partition partition_label on component_type module slot is below 70%, current usage partition_usage_percentage%
Cause	Utilization of the specified partition is below 70%, after previously being higher than 80%.
Effect	None.
Raising event	N/A
Clearing event	N/A

partitionUsageWarning

Table 15. partitionUsageWarning properties
Property name	Value
Application name	linux
Event name	partitionUsageWarning
Default severity	warning
Message format string	Partition partition_label usage on component_type module slot is higher than 80%, current usage partition_usage_percentage%
Cause	The specified partition is almost full, and action should be taken to remove unneeded files.
Effect	None.
Raising event	N/A
Clearing event	N/A

serviceConfigChanged

Table 16. serviceConfigChanged properties
Property name	Value
Application name	linux
Event name	serviceConfigChanged
Default severity	notice
Message format string	Service service_name configuration changed, service reloaded
Cause	The specified service configuration has been changed, and linux_mgr has reloaded the service.
Effect	New configuration for the service is now in effect.
Raising event	N/A
Clearing event	N/A

serviceDownInNetworkInstance

Table 17. serviceDownInNetworkInstance properties
Property name	Value
Application name	linux
Event name	serviceDownInNetworkInstance
Default severity	warning
Message format string	Service service_name is no longer operational in network instance net_inst
Cause	The specified service has been disabled in the specified network instance.
Effect	Functionality provided by the service is no longer available in the specified network instance.
Raising event	N/A
Clearing event	N/A

serviceUpInNetworkInstance

Table 18. serviceUpInNetworkInstance properties
Property name	Value
Application name	linux
Event name	serviceUpInNetworkInstance
Default severity	notice
Message format string	Service service_name is now operational in network instance net_inst
Cause	The specified service has been started in the specified network instance.
Effect	Functionality provided by the service is now available in the specified network instance.
Raising event	N/A
Clearing event	N/A

systemResourceHighUtilization

Table 19. systemResourceHighUtilization properties
Property name	Value
Application name	linux
Event name	systemResourceHighUtilization
Default severity	warning
Message format string	The system resource called resource_name has reached threshold% or more utilization
Cause	The specified resource utilization has crossed the configured rising threshold.
Effect	None.
Raising event	N/A
Clearing event	N/A

systemResourceHighUtilizationLowered

Table 20. systemResourceHighUtilizationLowered properties
Property name	Value
Application name	linux
Event name	systemResourceHighUtilizationLowered
Default severity	notice
Message format string	The system resource called resource_name has decreased back to threshold% or less utilization
Cause	The specified resource utilization has crossed the configured falling threshold after previously exceeding the rising threshold.
Effect	None.
Raising event	N/A
Clearing event	N/A

July 16, 2026