eventInstanceType

This textual convention describes the type of an instanceId
associated with each event and by that means specifies how
the instanceId variable should be intepreted.
          
Various instanceId types are specified below to enable fault
monitoring for different kind of devices from fixed
configuration pizza boxes to multi chassis nodes. All
instanceId types may not need to be used in every device
type.
          
Note also that instanceId semantics are element type dependent
(e.g. different kind of interface naming conventions may be used)
and thus instanceId usage may vary from element to element.
          
=========================================================================
Type            Description                                 Example form
                                                    of InstanceId
=========================================================================
unknown    (1)  unknown type                               - Irrelevant-
-------------------------------------------------------------------------
node       (2)  Associated with events originating from          1
        the node. Used for general events that     (Node number)
        can not be associated with any specific
        block. InstanceId value 1 is used for
        single node equipment.
-------------------------------------------------------------------------
shelf      (3)  Associated with events originating from          1
        the shelf. In the case of fixed       	(shelf number)
        configuration devices this type is used
        for events that are associated with the
        physical enclosure, e.g. faults related
        to fan etc. InstanceId value 1 is used
        for single self equipment.
-------------------------------------------------------------------------
line       (4)  Associated with events originating from
        physical interfaces or associated
        components such as line cards.
        InstanceId usage examples for faults
        originating from:
        - Physical port: Simply port number, e.g. .......1
-------------------------------------------------------------------------
switch     (5)  Associated with events originating from          1
        from a switch chip or a switch card.      (switch number)
        For single switch equipment InstanceId
        value 1 is used, for multi swich nodes
        InstanceId semantics if for further
        study.
-------------------------------------------------------------------------
lsp        (6)  Associated with events originating from          1
        a particular lsp.                           (lsp index)
        NOTE: In this case the InstanceName
        contains the lsp name and InstanceId
        contains lsp index.
-------------------------------------------------------------------------
l2Interface(7)  Associated with events originating from        - TBD -
        a particular layer 2 interface. Used for
        layer 2 related events such as L2 control
        protocol faults. InstanceId semantics is
        for further study.
-------------------------------------------------------------------------
l3Interface(8)  Associated with events originating from        - TBD -
        a particular layer 3 interface. Used for
        layer 3 related events such as L3 control
        protocol faults. InstanceId semantics is
        for further study.
-------------------------------------------------------------------------
rowIndex  (9)   Associated with events reporting about a
        'logical' or conceptual table that consists
        of rows.  The Instance Id is the index/key
        for a row in the table.  The format of the
        Instance Id will simply be a series of decimal
        numbers seperated by a '.':
=========================================================================