Special Tags for Reading and Creating Traps

Tag Address

Field of trap object assigned to Tag

T0

Enterprise (device sending the trap), for example .1.3.6.1.4.1.311.1.1.3.1.1

T1

IP address; for example 223.125.1.17

T2

Generic type. Available options are:

0 - cold start

1 - warm start

2 - link down

3 - link up

4 - authentication unsuccessful

5 - egpNeighbor loss

6 - enterprise-specific trap

T3

Specific type (i.e., a user-defined trap in the enterprise MIB). For example, 3.

T4

Time stamp; for example, 6336403.

T5

Accesses the OID for the SNMP VarBind which holds the selected subfield of the current trap. The variable 'SubfieldNumber' (see below) determines which subfield is accessed; e.g., .1.3.6.1.2.1.1.5.0

Note that T5 contains a value. It can be a dummy value if the SNMP variable doesn't exist. This value is only of use if your MIB contains access to the trap variable.

T6

Accesses the data in subfields of the current trap.  The variable 'SubfieldNumber' determines which subfield is accessed. When writing, you have to provide a value and a type.  The type has to be "INTEGER", "COUNTER", "GAUGE", "TIMETICK", "ADDRESS", or "STRING".  Strings should be less than 80 characters long.

TF

Trap forwarding IP address and community name.  When writing, the trap community name parameter is optional; for example, 196.168.1.34 trap.

TN (TrapNext)

Read  - Returns the number of traps in the queue.

Write - Deletes the current trap from the queue. The next trap in the queue becomes the current trap.

TNVB

Read  - Returns the number of VarBinds in the VarBindList of the current trap.

Write - Update SubfieldNumber.

SubfieldNumber

This is not a real tag: it is a software variable. SubfieldNumber can be updated by writing to TNVB. SubfieldNumber is set to zero whenever TN is written.