ELTEX-MES-ULD-MIB

Description: Eltex MES Unidirectional Link Detection MIB for detecting one-way link failures and disabling affected ports automatically.

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ELTEX-MES-ULD-MIB is a vendor MIB from Eltex covering the Unidirectional Link Detection (ULD) feature on its MES-series switches, a mechanism similar to Cisco's UDLD that detects one-way (unidirectional) link failures on fiber/copper links. Based on its sample objects, the module is organized around a management branch and a notifications branch for this feature. Its monitoring value is primarily fault-detection oriented: it is designed to alert administrators when a link is found to be unidirectional (able to send but not receive, or vice versa) so the affected port can be automatically disabled before it causes a network loop, making it a software-driven fault/status monitoring feature rather than a general performance or environmental MIB. It is conceptually related to standards-track and vendor UDLD-style mechanisms though implemented independently by Eltex, and works alongside the switch's standard interface (IF-MIB) status objects. It is deployed on Eltex MES-series Ethernet switches in enterprise/carrier access networks where loop prevention on uplinks is important, with the ELTEX-MES-ULD-MIB MIB defining the management and notification objects behind that protection.

Only the top-level eltMesULDMgmt (management/configuration branch) and eltMesULDNotifications (notification branch) were available in the sample objects, so detailed per-port table names cannot be confirmed here. An administrator would rely on eltMesULDNotifications traps to be alerted when the ULD feature detects a unidirectional link, and would consult objects under eltMesULDMgmt to confirm whether the feature is enabled and how it is configured on affected ports; receiving such a notification would reveal a one-way fiber/copper fault that could otherwise cause a switching loop.

Unidirectional link detection for Eltex managed switches (deprecated).