NAGIOS-NOTIFY-MIB

Description: Defines Nagios monitoring system trap notifications for host and service events.

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NAGIOS-NOTIFY-MIB is a vendor-neutral MIB built on top of the Nagios (v2.0) open-source monitoring system, defining objects used purely as OID carriers for SNMP TRAP/INFORM notifications about host and service events. It belongs to the IT-infrastructure/network monitoring software technology area. It exposes two parallel table structures — host event and service event tables, extended by host-notify and service-notify tables — covering hostname, alias, state ID/type, check attempt count, event duration, host group name, and last check/change timestamps; the table entries themselves are not directly walkable but exist to supply varbind OIDs for traps. Rather than describing physical hardware, this MIB relays the software-level up/down/warning/critical status Nagios itself has already determined for hosts and services, essentially forwarding Nagios's own health assessment (which may itself reflect underlying host CPU, disk, service, or process checks) onward via SNMP traps. It is tightly coupled to and dependent on the Nagios monitoring engine (v2.0 macros) as its data source rather than an independent data-collection standard. It's deployed wherever a Nagios server is configured to also emit SNMP traps/informs to a separate NMS or trap receiver for centralized alerting. Engineers implementing or auditing this functionality typically reference the NAGIOS-NOTIFY-MIB RFC/standard documentation for the authoritative specification.

This MIB's tables are not meant for direct polling — nagiosHostEventTable/nagiosHostEventEntry and the analogous service event table exist only to define varbind OIDs (nHostname, nHostStateID, nHostStateType, nHostAttempt, nHostDurationSec) carried inside an SNMP trap when Nagios detects a host or service state change. An NMS would receive a trap containing nHostname and nHostStateID indicating, for example, that a monitored host has gone from UP to DOWN, with nHostDurationSec showing how long the host has been in that state and nHostLastChange/nHostLastCheck giving timestamps. This lets a central trap receiver correlate Nagios-detected outages across many monitored hosts without polling Nagios directly.

Nagios SNMP MIB (Enterprise Number 20006) that defines objects for Nagios events and notifications, including Host and Service event tables for sending traps to network management systems.