How to Use the SNMP Walk Wizard in Nagios XI

Nagios XI includes a SNMP Walk wizard that enables you to easily scan an SNMP-enabled device (with v2c/v3 and optional MIB/OID filters) and quickly configure monitoring with numeric/string matches, thresholds, scheduling, and notifications.

You can also refer to this documentation for full details:

Here is a direct link to the PDF as well:

Using-The-SNMP-Walk-Wizard