Dell-STACK-MIB

Description: Manages switch stacking topology, unit roles, and stack member configuration on Dell switches.

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Dell-STACK-MIB is a Dell (RoweLogic 'rl' enterprise OID lineage used in Dell/Force10-class switches) MIB for managing switch stacking, covering stack unit identification, role/mode assignment, and stack topology. It exposes each stack member's active unit ID, its configured unit ID/mode to take effect after a reset, the unit's MAC address after reset, and the overall stack topology (e.g., ring or chain). Its monitoring value is around hardware/system state of the stack: rlStackCurrentUnitId and rlStackTopology reveal the live composition and arrangement of the physical stack, while the 'AfterReset' objects reveal pending configuration changes that take effect on the next reboot, useful for confirming a planned unit renumbering or mode change before it happens. As a stacking MIB it typically works alongside standard entity/chassis MIBs (ENTITY-MIB) to fully describe each physical unit in the stack. It is deployed on stackable Dell (PowerConnect/Force10-lineage) switches in wiring closets or small data centers where multiple switches are cabled together and managed as one logical unit. Engineers can download the Dell-STACK-MIB file directly to load it into their MIB browser.

An admin polls rlStackActiveUnitIdTable/rlStackActiveUnitIdEntry to enumerate every physical unit currently in the stack and confirm none have unexpectedly dropped out, and checks rlStackTopology to verify the stack cabling still forms the expected ring rather than degrading to a chain, which would indicate a broken stack cable. Comparing rlStackCurrentUnitId against rlStackUnitModeAfterReset lets an operator confirm a pending unit renumbering or mode change is queued correctly before the next reload, avoiding surprises after a maintenance reboot. rlStackUnitMacAddressAfterReset helps verify that a replacement unit will retain the expected identity once the stack reloads.

Stack unit configuration and management for Dell ROS (RADLAN OS) network devices.