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You can use Simple Network Management Protocol (SNMP) to configure the SNMP agent on the Citrix NetScaler appliance to generate asynchronous events, which are called traps. The traps are generated whenever there are abnormal conditions on the NetScaler. The traps are then sent to a remote device called a trap listener, which signals the abnormal condition on the NetScaler appliance. Or, you can query the SNMP agent for System-specific information from a remote device called an SNMP manager. The agent then searches the management information base (MIB) for the data requested and sends the data to the SNMP manager.
For information about SNMP parameters, traps, and its descriptions, see NetScaler SNMP OID reference.
The SNMP agent on the NetScaler can generate traps compliant with SNMPv1, SNMPv2, and SNMPv3. For querying, the SNMP agent supports SNMP version 1 (SNMPv1), SNMP version 2 (SNMPv2), and SNMP version 3 (SNMPv3).
The following figure illustrates a network with a NetScaler that has SNMP enabled and configured. In the figure, each SNMP network management application uses SNMP to communicate with the SNMP agent on the NetScaler. The SNMP agent searches its management information base (MIB) to collect the data requested by the SNMP Manager and provides the information to the application.
Importing MIB Files to the SNMP Manager and Trap Listener
To monitor a NetScaler appliance, you must download the MIB object definition files. The MIB files include the following:
MIB-2 groups SYSTEM, IF, ICMP, UDP, and SNMP.
NetScaler-specific configuration and statistics.
You can obtain the MIB object definition files from the /netscaler/snmp directory or from the Downloads tab of the NetScaler GUI.
If the SNMP management application is other than WhatsUpGold, download the following files to the SNMP management application:
NS-MIB-smiv1.mib. Used by SNMPv1 managers and trap listeners.
NS-MIB-smiv2.mib. Used by SNMPv2 and SNMPv3 managers and SNMPv2 trap listeners.
If the SNMP management application is WhatsUpGold, download the following files to the SNMP management application: