H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 44)

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The SNMP logging function logs Get requests, Set requests, and Set responses, but does not log Get
responses.
• Get operation—The agent logs the IP address of the NMS, name of the accessed node, and node
OID.
• 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 "Information
center configuration."
Enabling 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.
3. Configure SNMP log output
rules.
info-center source { module-name |
default } channel { channel-number
| channel-name } [ debug { level
severity | state state } * | log { level
severity | state state } * | trap
{ level severity | state state } * ] *
Optional.
By default, SNMP logs are output
only to loghost and logfile.
You can use this command to
specify other SNMP log
destinations such as the console or
a monitor terminal.
Configuring SNMP traps
The SNMP agent sends traps to inform the NMS of critical and 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 their severity and set output
destinations. For more information about the information center, see "Information center configuration."
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, you must enable the
linkUp or linkDown trap function globally by using the snmp-agent trap enable [ standard [ linkdown |
linkup ] * ] command and on the interface by using the enable snmp trap updown command.