that cause users to lose the full functionality of a network resource. It also provides network administrators with event management function- ality such as to generate alerts, execute automated actions, correlate events, filter traps/events/alerts and parse traps/events parsing, to detect, isolate and repair mal- functions in the network and its control subsystem. 12.12.1 Filtering and Processing Notifications The trap port is the port at which the FMS listens for SNMP notifications. By default, it is configured to listen at port 162. Trap ports can be dynamically configured through the Fault Management Client. 12.12.1.1 Configuring Trap Filters Traps need to be processed before they are converted into events. Trap filters are used to modify the properties of the incoming trap. Configuring filters at runtime eliminates the problem of restarting the server as it is done for configuration through configuration files. Trap filters can be configured at runtime. The type of trap, whether it is SNMP v1, v2 or v3, is specified in the runtime con- figuration wizard for configuring trap filters. Similarly to SNMP v2 traps, the trap OID is used for the SNMP v3 traps. The trap filter is configured based on the type of trap. The user gives input values either as generic type (GT) or specific type (ST). When specifying ST trap values, the OID value is given. 12.12.1.2 Configuring Trap Parsers When traps are received by the fault management system, they are filtered and the properties modified using trap filters. If the trap filter returns a trap PDU, then the traps will enter the trap parsers. Parsing traps generates meaningful events. The trap parser user interface configuration feature generates events from the SNMP traps and parsers configured for SNMP v1, v2c and v3 traps. 12 Fault Management A Runtime Administration Trap Filters Categories Fault Trap Filter Configuration (trap filters) Trap Filters The filters will be invoked in the same order as listed in Fault Parameter the table. Drag and Drop to change the order of 