NTP-MIB

Description: MIB for Network Time Protocol (NTP) on BSD Unix systems, tracking peer stratum, polling interval, reachability, delay, offset, dispersion, and mode

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NTP-MIB is a vendor-neutral, standards-oriented MIB module, rooted under a 'unix' branch and associated with BSD-derived Unix implementations, for monitoring the Network Time Protocol (NTP) service running on a host. It exposes a peer table listing each configured NTP peer along with per-peer synchronization metrics: stratum level, polling interval, reachability, round-trip delay, clock offset, and dispersion. In device/software monitoring terms it is focused on software service status: verifying that the local NTP daemon has reachable, healthy time sources and is maintaining accurate synchronization, since time drift can cascade into authentication, logging, and correlation failures elsewhere. It is a largely self-contained MIB relying only on standard SNMP SMI conventions, though it is often deployed alongside host-resource and system MIBs for broader host health monitoring. It is typically deployed on Unix/BSD/Linux servers and network devices running an NTP daemon, monitored by NMS tools per the NTP-MIB RFC to ensure time synchronization integrity across the estate.

An administrator would poll ntpPeersEntry rows to see, for each ntpPeer, its ntpStratum and ntpReachability; a reachability of zero indicates the peer is currently unreachable and the local clock may be running unsynchronized. Examining ntpOffsetI/ntpOffsetF and ntpDispersionI/ntpDispersionF for a peer reveals whether the reported clock offset and dispersion are within acceptable bounds, while ntpDelayI/ntpDelayF show network round-trip delay to that time source; a persistently high offset or dispersion signals a degraded or unreliable time reference.

Network Time Protocol peer management and synchronization statistics for Unix systems.