H3C Technologies H3C S7500E Series Switches - Manual (Page 125)

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z A large number of logs occupy storage space of the device, thus affecting the performance
of the device. Therefore, it is recommended to disable SNMP logging.
z The size of SNMP logs cannot exceed that allowed by the information center, and the total
length of the node field and value field of each log record cannot exceed 1K bytes;
otherwise, the exceeding part will not be displayed.
z For the detailed description of system information, the information center and the
info-center source command, see Information Center Configuration in the Network
Management and Monitoring Configuration Guide.
Configuring SNMP Trap
Enabling the Trap Function
The SNMP agent sends traps to the NMS to inform the NMS of critical and important events
(such as reboot of a managed device). Two types of traps are available: generic traps and
vendor-specific traps. Generic traps supported on the device include: authentication,
coldstart, linkdown, linkup and warmstart. The others are self-defined traps, which are
generated by different modules. As traps that occupy large device memory affect device
performance, it is recommended not to enable the trap function for all modules but for the
specific modules as needed.
With the trap function enabled on a module, the traps generated by the module will be sent to
the information center. The information center has seven information output destinations. By
default, traps of all modules are allowed to be output to the console, monitor terminal (monitor),
loghost, and logfile; traps of all modules and with level equal to or higher than warnings are
allowed to be output to the trapbuffer and SNMP module (snmpagent); and traps cannot be sent
to the logbuffer. You can set parameters for the information center based on the levels of the
traps generated by each module, and thus decide the output rules of traps (that is, whether
traps are allowed to be output and the output destinations). For the configuration of the
information center, see Information Center Configuration in the Network Management and
Monitoring Configuration Guide.
Follow these steps to enable the trap function:
To do… Use the command… Remarks
Enter system view system-view —