CISCOSB-STACK-MIB

Description: Monitors and configures switch stacking topology, unit roles, and interconnects on Cisco Small Business stackable switches.

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CISCOSB-STACK-MIB manages and monitors the stacking topology of Cisco Small Business stackable switches, covering which physical unit is acting as the active/master unit, each unit's stacking mode, and the physical interconnect ports that link stack members together. It exposes hardware-oriented status objects including the current active unit ID, per-unit stacking mode (standalone vs. stacked), unit MAC addresses, and post-reset role/mode predictions, making it directly useful for tracking the operational health and role of each physical switch in a stack. This is squarely a hardware-status MIB: a change in the active unit ID, a unit dropping out of hybrid/interconnect pairing, or an unexpected mode change after a reset are all signals of a hardware or cabling fault in the stack. It complements standard entity and interface MIBs by adding stack-specific role and topology detail not covered by generic IETF modules. It is used in Cisco Small Business network deployments where multiple physical switches are stacked to act as a single logical switch. Engineers can download the CISCOSB-STACK-MIB file directly to load it into their MIB browser.

An administrator polls rlStackCurrentUnitId to identify which physical unit is currently the stack master, and rlStackUnitMode to confirm whether a given unit is operating in standalone or stacked mode. The rlStackHybridTable and its rlStackHybridPortsPair objects show which physical ports form the stack interconnect; if a unit's hybrid pairing disappears or rlStackActiveUnitIdAfterReset shows an unexpected value following a reboot, that's a strong indicator of a broken stack cable or failed unit.

Configures unit ID and stack mode for Cisco Small Business stacked switch systems.