The Corrupted LSP Detected Notification is generated when 
a corrupted Link State PDU is detected in memory.

Generated when a PDU is received from Wrong/different 
area not recognised by this system

The Manual Address Dropped From Area Notification is generated 
when one of the manualAreaAddresses (specified on this system) is 
ignored when computing partitionAreaAddresses or areaAddresses 
because there are more than MaximumAreaAddresses distinct 
Area Addresses. The hwIsisTrapDroppedAreaAddr argument 
is set to the ignored Area Address. It is generated once for 
each Area Address in manualAreaAddresses which is dropped. 
The occurance of this event is counted by the 
isisSysManAddrDropFromAreas counter.

The Attempt To Exceed Maximum Sequence Number Notification is 
generated when an attempt is made to increment the sequence 
number of an LSP beyond the maximum sequence number.  
Following the generation of this event the operation  of the 
Routeing state machine shall be disabled for atleast
(MaxAge + ZeroAgeLifetime) seconds.  The occurance of this
event is counted by the  isisSysAttmptToExMaxSeqNums  
counter.

The Sequence Number Skipped Notification is generated when the 
sequence number of an LSP is incremented by more than one.  The 
occurance of this event is counted by the isisSysSeqNumSkips 
      counter.

The Own LSP Purged Notification is generated when a zero aged copy 
of a system's own LSP is received from some other system. This 
   represents an erroneous attempt to purge the local system's LSP.
   The occurance of this event is counted by the isisSysOwnLSPPurges 
   counter.

The Circuit Change Notification is generated when the state of 
the Circuit changes from On to Off or from Off to On. The relative 
     order of events relating to the same Circuit must be preserved.

The Adjacency State Change Notification is generated when the state 
of an Adjacency on the Circuit changes from Up to Down or Down to  
Up. For these purposes the states Up and Up/dormant are considered 
to be Up, and any other state is considered to be Down. The occurance 
of this event is counted by  the isisCircAdjChanges counter.

The Initialisation Failure Notification is  
generated when an attempt to initialise with an adjacent system fails 
as a result of either Version Skew or Area Mismatch. In the case of 
Version Skew, the  Adjacent system argument is not present.  The 
occurance of this event is counted by the isisCircInitFails counter.

The Rejected Adjacency Notification is generated when an attempt 
to create a new adjacency is rejected, because of a lack of resources.          The occurance of this event is counted by the isisCircRejAdjs counter.

The LAN L1 Designated Intermediate System Change Notification 
is generated when the local system either elects itself or resigns as 
being the LAN L1 Designated Intermediate System on this  
circuit. The relative order of these events must be  
preserved. The occurance of this event is counted by  
the isisCircLANL1DesISChanges counter.

The Corrupted LSP Received Notification is generated when 
a corrupted Link State PDU is Received.  The occurance of 
this event is counted by the isisSysCorrLSPscounter.

The LAN L2 Designated Intermediate System Change Notification 
is generated when the local system either elects itself or resigns as 
being the LAN L2 Designated Intermediate System on this  
circuit. The relative order of these events must be  
preserved. The occurance of this event is counted by  
the isisCircLANL2DesISChanges counter.

The LSP L1 Database Overload Notification is generated when the 
l1State of the system changes between On and Waiting or Waiting
and  On. The isisSysL1State argument is set to indicate the 
resulting state, and in the case of Waiting the isisSysID is 
set to indicate the source of the LSP which precipitated the 
overload.  The occurance of this event is counted by the 
isisSysLSPL1DbaseOloads counter.

The LSP L2 Database Overload Notification is generated when the 
l2State of the system changes between On and Waiting or Waiting and             
On. The isisSysL2State argument is set to indicate the  
resulting state, and in the case of Waiting the isisSysID is set to 
indicate the source of the LSP which precipitated the overload.  
The occurance of this event is counted by the 
isisSysLSPL2DbaseOloads counter.

Generated when a PDU is received with an incorrect 
Authentication information field

Generated when a Adjacency Request for Wrong/unsupported 
adjacency type is made.

Generated when a PDU of Wrong/different version is received

The hwIsisIDFieldLengthMismatch Notification is generated when a PDU is 
received with a different value for ID field length to that of the  
receiving Intermediate system. The occurance of this  
event is counted by the isisSysIDFieldLenMismatches.

Generated when a PDU is received from Wrong/different 
area not recognised by this system