All MIBs › RFC1158-MIB
Category: IETF Standards
Description:
Provides MIB-II extension objects for network management beyond the RFC 1156 base MIB.
What Is RFC1158-MIB?
RFC1158-MIB is an early, now-historical IETF MIB that provided extension objects for network management beyond the original RFC 1156 MIB-I, effectively an interim revision that was later superseded by the RFC 1213 MIB-II standard. It exposes the core system and interfaces groups — system description, object ID, uptime, contact, name, location, services, and the interface table — giving a baseline view of a device's identity and network interfaces. Its monitoring value is foundational: sysUpTime reveals device/agent restarts, sysContact/sysName/sysLocation support inventory and fault-routing, and ifTable/ifEntry exposes per-interface operational and administrative status for hardware connectivity monitoring. It was effectively absorbed into and superseded by RFC 1213 (MIB-II) and is rarely used standalone on modern equipment. It would only be encountered on legacy SNMP agents that predate full MIB-II adoption. Encountering the RFC1158-MIB MIB in the wild today is rare, since virtually all modern SNMP agents implement the superseding MIB-II definitions instead.
IPNetwork Monitor allows you to monitor SNMP objects defined in RFC1158-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.
What Can Be Monitored
- system uptime
- system description/object ID
- system contact/name/location
- interface count
- interface table entries
Supported Devices
- vendor-neutral, standards-based legacy MIB, not tied to a specific manufacturer; applies to any early SNMP-capable network device
Monitoring Examples
A management station polling this MIB would read sysUpTime to detect an unexpected device reboot, and walk ifTable/ifEntry (keyed by ifIndex) to check interface counts via ifNumber and per-interface presence. sysDescr and sysObjectID would be used to identify the device type and firmware, while sysContact/sysName/sysLocation support asset and fault-routing workflows on legacy agents still exposing this early MIB-II variant.
RFC description
RFC 1158 MIB for management of TCP/IP-based internets with SNMPv1 base objects.
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