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Monitor and troubleshoot
Documents in this section 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.
Log Events Guide
This document provides guidance for operators to interpret log events for the Nokia Service Router Linux (SR Linux).
ospf

Monitor and troubleshoot
Documents in this section 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.
- Troubleshooting Toolkit
  This document describes how to use and configure diagnostic tools for the Nokia Service Router Linux (SR Linux).
- 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).

ospf

ospfAdjacencyBfdSessionSetupFailed

Table 1. ospfAdjacencyBfdSessionSetupFailed properties
Property name	Value
Application name	ospf
Event name	ospfAdjacencyBfdSessionSetupFailed
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: BFD session setup failed for the OSPF neighbor ospfNbrRtrId, using interface subinterface. Failure reason: bfd_failure_reason.
Cause	This event is generated when BFD session setup fails with an adjacent OSPF neighbor.
Effect	Fast failure detection may not be possible.

ospfAdjacencyChange

Table 2. ospfAdjacencyChange properties
Property name	Value
Application name	ospf
Event name	ospfAdjacencyChange
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: Adjacency with neighbor ospfNbrRtrId, using interface subinterface, moved to state ospfNbrState due to event ospfNbrEvent.
Cause	This event is generated when an OSPF Neighbor changes state.
Effect	OSPF routing information can only utilized from neighbors in an up state.

ospfAdjacencyRestartStatusChange

Table 3. ospfAdjacencyRestartStatusChange properties
Property name	Value
Application name	ospf
Event name	ospfAdjacencyRestartStatusChange
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: The graceful restart status for OSPF neighbor ospfNbrRtrId on interface subinterface moved to new state restart_status.
Cause	This event is generated when the graceful restart status of a neighbor changes.
Effect	None

ospfAsMaxAgeLSA

Table 4. ospfAsMaxAgeLSA properties
Property name	Value
Application name	ospf
Event name	ospfAsMaxAgeLSA
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance area ospfAreaId: Max aged LSA ospfLsdbLsid type ospfLsdbType advertising router ospfLsdbRtrId.
Cause	One of the LSAs in the router's link-state database has reached its maximum age limit.
Effect	The Max Age LSA will be flushed from the LSDB.

ospfExportLimitReached

Table 5. ospfExportLimitReached properties
Property name	Value
Application name	ospf
Event name	ospfExportLimitReached
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: The export-limit ospfExportLimit is reached, additional routes will not be exported by OSPF.
Cause	This event is generated when OSPF has exported the maximum number of routes.
Effect	OSPF will not export any more routes.

ospfExportLimitWarning

Table 6. ospfExportLimitWarning properties
Property name	Value
Application name	ospf
Event name	ospfExportLimitWarning
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: OSPF has reached ospfExportLimitLogPercent% of the export-limit ospfExportLimit.
Cause	This event is generated when OSPF has exported the maximum number of routes.
Effect	OSPF will not export any more routes.

ospfFailure

Table 7. ospfFailure properties
Property name	Value
Application name	ospf
Event name	ospfFailure
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: has failed due to ospfFailureReason.
Cause	OSPF encountered an event forcing it to go down.
Effect	OSPF goes down and will restart after a timout.

ospfIfLdpSyncStateChange

Table 8. ospfIfLdpSyncStateChange properties
Property name	Value
Application name	ospf
Event name	ospfIfLdpSyncStateChange
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: Interface subinterface, ldp-sync-state moved to state ospfIfLdpSyncState
Cause	This event is generated when an OSPF interface ldp-synchronization changes state.
Effect	Metric of the interface changes to or from infinity.

ospfIfRxBadPacket

Table 9. ospfIfRxBadPacket properties
Property name	Value
Application name	ospf
Event name	ospfIfRxBadPacket
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: A bad packet was received on interface subinterface from ospfPacketSrcAddress in packet type ospfPacketType
Cause	This event is generated An OSPF packet has been received on an interface that cannot be parsed.
Effect	Bad packet is discarded

ospfIfStateChange

Table 10. ospfIfStateChange properties
Property name	Value
Application name	ospf
Event name	ospfIfStateChange
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: Interface subinterface, moved to state ospfIfState due to event ospfIfEvent
Cause	This event is generated when an OSPF interface changes state.
Effect	An OSPF adjacency can not be established if the interface state is down or loop.

ospfLsdbApproachingOverflow

Table 11. ospfLsdbApproachingOverflow properties
Property name	Value
Application name	ospf
Event name	ospfLsdbApproachingOverflow
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: The number of external LSAs has exceeded 90% of the configured limit ospfExtLsdbLimit.
Cause	The number of external LSAs in the router's link-state database has exceeded ninety percent of the configured limit.
Effect	Warning only, normal behavior will continue.

ospfLsdbOverflow

Table 12. ospfLsdbOverflow properties
Property name	Value
Application name	ospf
Event name	ospfLsdbOverflow
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: The number of external LSAs has exceeded the configured limit ospfExtLsdbLimit.
Cause	The number of external LSAs in the router's link-state database has exceeded the configured limit.
Effect	No additional external LSA will be added.

ospfNbrMtuMismatch

Table 13. ospfNbrMtuMismatch properties
Property name	Value
Application name	ospf
Event name	ospfNbrMtuMismatch
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: Neighbor ospfNbrRtrId, using interface subinterface, signaled an unacceptable MTU.
Cause	This event is generated when an OSPF Neighbor signals an incorrect MTU.
Effect	An OSPF adjacency cannot be established if there is an MTU mismatch.

ospfOverloadEntry

Table 14. ospfOverloadEntry properties
Property name	Value
Application name	ospf
Event name	ospfOverloadEntry
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: the LSDB database has entered the overload state due to ospfOverloadReason.
Cause	Overload bit configuration
Effect	No transit traffic is routed through the overloaded router.

ospfOverloadExit

Table 15. ospfOverloadExit properties
Property name	Value
Application name	ospf
Event name	ospfOverloadExit
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: the LSDB database has exited the overload state.
Cause	Overload bit cleared
Effect	The OSPF instance has cleared the overload state.

ospfOverloadWarning

Table 16. ospfOverloadWarning properties
Property name	Value
Application name	ospf
Event name	ospfOverloadWarning
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: ospfOverloadReason.
Cause	Overload bit configuration
Effect	No transit traffic is routed through the overloaded router.

ospfSpfRunRestarted

Table 17. ospfSpfRunRestarted properties
Property name	Value
Application name	ospf
Event name	ospfSpfRunRestarted
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: SPF runs resumed - memory resources available.
Cause	There are sufficient memory resources on the system to run the SPF to completion.
Effect	OSPF stops running SPFs until enough memory resources become availableOSPF will resume running the SPFs as required.

ospfSpfRunsStopped

Table 18. ospfSpfRunsStopped properties
Property name	Value
Application name	ospf
Event name	ospfSpfRunsStopped
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: SPF runs stopped - insufficient memory resources.
Cause	There are insufficient memory resources on the system to run the SPF to completion.
Effect	OSPF stops running SPFs until enough memory resources become available.

ospIfAuthDataFailure

Table 19. ospIfAuthDataFailure properties
Property name	Value
Application name	ospf
Event name	ospIfAuthDataFailure
Default severity	warning
Message format string	Network-instance network_instance - OSPF instance ospfInstance: A packet received on interface subinterface from ospfPacketSrcAddress and packet type ospfPacketType, failed authentication with ospfAuthError
Cause	This event is caused by interface from a router whose authentication key or authentication type conflicts with this router's authentication key or authentication type.
Effect	PDUs are dropped, with the effect depending on the PDU type