X25-MIB

MIB Reference — IPNetwork Monitor · Updated September 21, 2026

All MIBs › X25-MIB

Category: Legacy and Miscellaneous

Description: Manages X.25 packet-switched network interface configuration, virtual circuit state, and packet-layer statistics.

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What Is X25-MIB?

X25-MIB is a vendor-neutral IETF standards-track MIB for managing X.25 packet-switched network interfaces, a legacy WAN protocol used before frame relay and IP largely replaced it. It exposes configuration for the Packet Level Entity (PLE), channel assignments, and packet-layer statistics -- effectively both the administratively configured settings and the values actually in use on the interface. Its monitoring value centers on verifying interface configuration and traffic/error statistics at the X.25 packet layer, letting an operator confirm the link's virtual circuits are configured and functioning as intended and spot packet-layer errors or mismatches between configured and operational values. As an interface-layer MIB it typically works alongside the standard IF-MIB, since X.25 PLEs are represented as interfaces in ifTable. It would be found on legacy WAN routers, X.25 packet switches, and PADs (packet assemblers/disassemblers) still operating in older telecom or banking/financial networks. Engineers can download the X25-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in X25-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
  • X.25 packet switch / legacy WAN router

Monitoring Examples

An administrator would poll the PLE table to compare configured channel assignments and administrative parameters against the values actually in use, and check packet-layer statistics counters for errors or resets on a given virtual circuit. A mismatch between the administrator-set values and the in-use values would indicate a configuration that failed to apply or a fallback to defaults, useful for diagnosing why an X.25 link is not passing traffic as expected.

What Can Be Monitored

  • PLE administrative vs. operational configuration
  • virtual circuit/channel assignments
  • packet-layer error statistics
  • packet-layer traffic counters
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC-1215

TRAP-TYPE

From RFC1155-SMI

Counter
TimeTicks
enterprises

From RFC1213-MIB

DisplayString

From RS232-MIB

rs232PortIndexOBJECT-TYPE

From SNMPv2-TC

RowStatus
OIDs

RFC description

Manages X.25 packet layer protocol configuration, channels, and statistics on network access devices.

Start monitoring vendor-neutral, standards-based MIB, X.25 packet switch / legacy WAN router (PLE channel-assignment/packet-layer statistics 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.

Download X25-MIB