RFC1398-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsRFC1398-MIB

Category: IETF Standards

Description: Defines Ethernet-like interface management objects for MAC statistics and error counters per RFC 1398.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

What Is RFC1398-MIB?

RFC1398-MIB, widely known as the EtherLike-MIB, is a vendor-neutral, IETF standards-based module defining management objects for Ethernet-like (CSMA/CD) network interfaces. It exposes MAC-layer statistics per interface such as alignment errors, FCS (frame check sequence) errors, single/multiple collision frame counts, deferred transmissions, and carrier-sense errors, extending the base interfaces group. It is a link-health hardware-monitoring MIB — administrators use its per-interface error and collision counters to detect duplex mismatches, bad cabling, or a failing NIC/switch port well before an interface goes fully down. It complements and is indexed against the standard IF-MIB (ifTable), sharing ifIndex values with each Ethernet interface. It's deployed on essentially every Ethernet-capable router, switch, and host that supports SNMP. Engineers implementing or auditing this functionality typically reference the RFC1398-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in RFC1398-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.

Supported Devices

  • vendor-neutral, standards-based MIB, not tied to a specific manufacturer — applies to any Ethernet-capable network device

Monitoring Examples

The dot3StatsTable/dot3StatsEntry rows would be polled per Ethernet interface for FCS and alignment error counts; a rising count on one port while others stay flat typically points to a bad cable or transceiver on that specific link. Climbing single/multiple collision-frame counts alongside deferred-transmission counts on a port is a classic signature of a duplex mismatch between a switch and its connected device.

What Can Be Monitored

  • FCS/checksum errors
  • alignment errors
  • single/multiple collision frame counts
  • deferred transmissions
  • carrier-sense errors
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
Gauge

From RFC1213-MIB

transmission
OIDs

RFC description

Defined in RFC 1398, provides SNMP MIB for managing and monitoring SNMP protocol statistics and operations.

Start monitoring vendor-neutral, standards-based EtherLike-MIB, any Ethernet-capable network device with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download RFC1398-MIB