H3C Technologies H3C SecBlade LB Cards - Manual (Page 67)

58
• Set operation—The agent logs the NMS' IP address, name of accessed node, node OID, variable
value, and error code and index for the Set operation.
The SNMP module sends these logs to the information center as informational messages. You can
configure the information center to output these messages to certain destinations, for example, the
console and the log buffer. The total output size for the node field (MIB node name) and the value field
(value of the MIB node) in each log entry is 1024 bytes. If this limit is exceeded, the information center
truncates the data in the fields. For more information about the information center, see "Configuring the
information center."
To configure SNMP logging:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable SNMP logging.
snmp-agent log { all |
get-operation | set-operation } By default, SNMP logging is
disabled.
Configuring SNMP traps
The SNMP agent sends traps to inform the NMS of important events, such as a reboot.
Traps fall into generic traps and vendor-specific traps. Available generic traps include authentication,
coldstart, linkdown, linkup and warmstart. All other traps are vendor-defined.
SNMP traps generated by a module are sent to the information center. You can configure the information
center to enable or disable outputting the traps from a module by severity and set output destinations. For
more information about the information center, see "Configuring the information center."
Enabling SNMP traps
Enable SNMP traps only if necessary. SNMP traps are memory-intensive and may affect device
performance.
To generate linkUp or linkDown traps when the link state of an interface changes, enable the linkUp or
linkDown trap function both globally by using the snmp-agent trap enable [ standard [ linkdown |
linkup ] * ] command and on the interface by using the enable snmp trap updown command.
After you enable a trap function for a module, whether the module generates traps also depends on the
configuration of the module. For more information, see the configuration guide for each module.
To enable traps:
Step Command Remarks
1. Enter system view. system-view N/A