isis

Application name

isis

Event name

isisAdjacencyBfdSessionSetupFailed

Default severity

warning

Message format string

In network-instance network_instance, BFD session setup failed for the level IS-IS adjacency with system sys_id, using interface subinterface. Failure reason: bfd_failure_reason.

Cause

This event is generated when BFD session setup fails with an adjacent neighbor.

Effect

Fast failure detection may not be possible.

Application name

isis

Event name

isisAdjacencyChange

Default severity

warning

Message format string

In network-instance network_instance, the level IS-IS adjacency with system sys_id, using interface subinterface, moved to state adj_state.

Cause

This event is generated when an IS-IS adjacency enters or leaves the up state.

Effect

IS-IS traffic can only be forwarded along adjacencies that are up.

Application name

isis

Event name

isisAdjacencyRestartStatusChange

Default severity

warning

Message format string

In network-instance network_instance, the graceful restart status for the level IS-IS adjacency 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

Application name

isis

Event name

isisAreaMismatch

Default severity

warning

Message format string

In network-instance network_instance, a level1 PDU was received on interface subinterface with no Area Addresses matching the areas to which this IS router belongs. The PDU starts with: pdu_fragment

Cause

This event is generated to alert of a possible area-id misconfiguration inside a L1 area.

Effect

L1 adjacency cannot form

Application name

isis

Event name

isisAuthDataFail

Default severity

warning

Message format string

In network-instance network_instance, a level PDU was received on interface subinterface with unexpected or incorrect data in the Authentication TLV. The PDU starts with: pdu_fragment

Cause

This event could be caused by incorrect keychain configuration in this router or its neighbor.

Effect

PDUs are dropped, with the effect depending on the PDU type

Application name

isis

Event name

isisAuthTypeMismatch

Default severity

warning

Message format string

In network-instance network_instance, a level PDU was received on interface subinterface with an unrecognized or unsupported authentication type in TLV 10. The PDU starts with: pdu_fragment

Cause

This event could be caused by incorrect keychain configuration in this router or its neighbor.

Effect

PDUs are dropped, with the effect depending on the PDU type

Application name

isis

Event name

isisCircuitIdsExhausted

Default severity

warning

Message format string

In network-instance network_instance, the IS-IS interface subinterface is operationally down because the limit of 255 circuit IDs available to LAN interfaces was reached.

Cause

This event is caused by having too many LAN interfaces.

Effect

LAN adjacencies are not formed

Application name

isis

Event name

isisCircuitMtuTooLow

Default severity

warning

Message format string

In network-instance network_instance, a level LSP PDU or SNP PDU could not be transmitted on interface subinterface because the IP MTU is only operational_subif_mtu and an MTU of at least required_mtu is required.

Cause

The port MTU is too small and/or the lsp-mtu-size is too large.

Effect

PDUs are dropped

Application name

isis

Event name

isisCorruptedLspDetected

Default severity

warning

Message format string

In network-instance network_instance, the LSP PDU with ID lsp_id in the level database has become corrupted.

Cause

Memory corruption or other.

Effect

LSP is removed

Application name

isis

Event name

isisLdpSyncExited

Default severity

warning

Message format string

In network-instance network_instance, the LDP synchronization state has ended on IS-IS interface subinterface, and now the state is sync_state

Cause

The LDP synchronization timer can be stopped because of a tools command, hold-down timer expiry or indication from the LDP peer that End-of-LIB has been received. When LDP sync is exited IS-IS resumes advertising a normal metric for the interface.

Effect

Transit traffic can start using this interface again.

Application name

isis

Event name

isisLdpSyncTimerStarted

Default severity

warning

Message format string

In network-instance network_instance, the LDP synchronization timer has started on IS-IS interface subinterface

Cause

The sync timer is started when LDP synchronization is configured and the LDP adjacency comes up with the LDP peer. When this timer expires IS-IS will resume advertisement of a normal metric for the interface.

Effect

Transit traffic will continue to avoid using this interface.

Application name

isis

Event name

isisLspFragmentTooLarge

Default severity

warning

Message format string

In network-instance network_instance, the level LSP PDU fragment lsp_id received on interface subinterface could not be accepted because the configured LSP MTU size is too small. An LSP MTU size of at least required_lsp_mtu bytes is required.

Cause

Misconfiguration of LSP MTU size

Effect

LSP PDU is not accepted

Application name

isis

Event name

isisLspPurge

Default severity

warning

Message format string

In network-instance network_instance, the LSP PDU with ID lsp_id in the level database has been purged by purge_originator.

Cause

LSP lifetime expired or other reason

Effect

The PDU is removed

Application name

isis

Event name

isisLspSequenceNumberSkip

Default severity

warning

Message format string

In network-instance network_instance, the LSP with id lsp_id in the level database was re-originated with a sequence number that incremented by more than one.

Cause

There may be another IS router configured with the same system ID.

Effect

None

Application name

isis

Event name

isisMaxAreaAddressesMismatch

Default severity

warning

Message format string

In network-instance network_instance, a level PDU was received on interface subinterface with an unexpected Max Area Addresses value in the IS-IS PDU header. The PDU starts with: pdu_fragment

Cause

Misconfiguration of max area addresses in the neighbor

Effect

The PDU is dropped

Application name

isis

Event name

isisMaxLspSequenceNumberExceeded

Default severity

warning

Message format string

In network-instance network_instance, the LSP with id lsp_id in the level database was purged because the sequence number was already at its maximum value and could not be incremented.

Cause

A possible cause could be that the same system-id is configured on multiple systems; when 2 systems have the same system-id they both keep incrementing the LSP sequence number, causing the sequence counter to rollover.

Effect

The PDU is purged and reachability may be temporarily lost

Application name

isis

Event name

isisOverloadEntry

Default severity

warning

Message format string

In the IS-IS instance of network-instance network_instance, the level database has entered the overload state.

Cause

Overload bit configuration

Effect

No transit traffic is routed through the overloaded router.

Application name

isis

Event name

isisOverloadExit

Default severity

warning

Message format string

In the IS-IS instance of network-instance network_instance, the level database has exited from the overload state.

Cause

Overload bit configuration

Effect

Transit traffic can again be routed through the router.

Application name

isis

Event name

isisOwnLspPurge

Default severity

warning

Message format string

In network-instance network_instance, a level LSP PDU was received with the system ID of this IS router and age equal to zero. The purge originator was purge_originator.

Cause

LSP lifetime expired or other reason

Effect

The PDU is removed

Application name

isis

Event name

isisSystemIdLengthMismatch

Default severity

warning

Message format string

In network-instance network_instance, a level PDU was received on interface subinterface with an unexpected System ID length in the IS-IS PDU header. The PDU starts with: pdu_fragment

Cause

Misconfiguration of system ID length in the neighbor

Effect

The PDU is dropped

Application name

isis

Event name

isisVersionMismatch

Default severity

warning

Message format string

In network-instance network_instance, a level PDU was received on interface subinterface with an IS-IS protocol version not matching the expected value. The PDU starts with: pdu_fragment

Cause

Unsupported IS-IS version

Effect

PDUs cannot be exchanged