NEC Express5800/320Fc Manual download pdf (Page 135)

Trap Filtering

Simple Network Management Using Net-SNMP and ftlSNMP 8-33

Trap Filtering

This section discusses the following topics:

•

‘‘Trap-Filtering Capability”

•

‘‘Activating and Deactivating Trap Filtering”

•

‘‘Trap-Filtering Examples”

Trap-Filtering Capability

ftlSNMP provides the ability to filter out transitional traps. Traps are messages that

inform you about network events. Hardware components that go in and out of service

trigger a number of traps that are seen at the management client. Some of these traps

are actually transitional state information for devices. For example, when you bring up

a CPU element, the CPU board’s state changes from DIAGNOSTICS to INITIALIZING,

ONLINE, and then DUPLEX. However, if you are interested in only the end-state (for

example, ONLINE and DUPLEX), the trap-filtering capability is useful.

Another reason to use the trap-filtering capability is that some SNMP traps are

triggered by obvious reason codes. For example, when you bring down an I/O element,

the display controller with the device path 10/0 or 11/0 will change state from DUPLEX

to OFFLINE with the reason code of PARENT_EMPTY. If you are not interested in this

type of trap, use the trap-filtering capability.

Activating and Deactivating Trap Filtering

To activate trap filtering, specify the following configuration line in the

/etc/opt/ft/snmp/ftltrapsubagent.conf file:

sraTrapFiltering on

When you activate trap filtering, traps with the following operational states are filtered

out:

•

DUMPING

•

DIAGNOSTICS

•

DIAGNOSTICS_PASSED

•

INITIALIZING

•

SYNCING

•

FIRMWARE_UPDATE

•

FIRMWARE_UPDATE_COMPLETE

•

UNKNOWN

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NEC Express5800/320Fc Manual Page 135

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