CABLE-DIAG-MIB

Description: Provides generic cable diagnostics for physical cable testing including time-domain reflectometry (TDR) and fault detection on network cables.

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CABLE-DIAG-MIB is a vendor-neutral MIB that provides a generic framework for diagnosing the physical cables attached to a network device, using techniques such as time-domain reflectometry (TDR) to detect faults like opens, shorts, or impedance mismatches along a cable run. It exposes diagnostic test control and result data describing cable fault type, estimated distance to fault, and pair-level status rather than steady-state traffic counters. In monitoring terms it is used almost entirely for physical-layer hardware fault detection -- letting an operator remotely determine whether a reported link-down or degraded-link condition is caused by a bad or damaged cable rather than a configuration or device problem. It is designed to complement standard interface MIBs (IF-MIB) by adding physical cable test capability tied to specific ifIndex entries. It would typically be deployed on managed Ethernet switches and routers that support on-board cable diagnostic hardware, making this CABLE-DIAG-MIB reference useful for administrators standardizing physical-layer fault diagnosis across devices.

An administrator troubleshooting a port that shows as down in IF-MIB's ifOperStatus would trigger a cable diagnostic test via this MIB and then poll its result table to see the fault type and estimated distance to the break for that ifIndex. A reported open or short at a specific cable length would confirm a physical cable fault rather than a switch hardware or configuration issue, directing a technician to the exact spot to inspect. No concrete object names were provided in the source, so this describes the intended usage pattern rather than specific verified OIDs.

Vendor-private MIB for cable plant diagnostics, testing, and physical layer troubleshooting on network devices.