AT-STACK-MIB

Description: Manages Allied Telesis stacking topology, member roles, inter-switch links, and virtual chassis configuration.

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AT-STACK-MIB is Allied Telesis's private MIB for managing switch stacking (virtual chassis) configurations, where multiple physical switches operate as one logical unit. It exposes stack member identity, role assignment (dedicated master/backup dedicated master), inter-switch link traffic counters, and stack-wide packet statistics. Its monitoring value spans both hardware and software status: it reveals which physical member holds the master role, tracks inter-switch link health via rxPkts/txPkts/rxDiscards/txFails counters, and can indicate a failing stacking link through rising discard or failure counts. It is an Allied Telesis proprietary extension with no strong dependency on external standard MIBs, since stacking is a vendor-specific feature. It is deployed in enterprise or campus network environments where multiple Allied Telesis switches are stacked for higher port density and simplified management as a single logical switch. Network engineers evaluating or troubleshooting this functionality can download the AT-STACK-MIB file directly to load it into their MIB browser.

An administrator would poll stackMemberTable/stackMemberEntry to confirm each memberHostId and macAddress is present and check which member is flagged as dedicatedMaster versus backupDedicatedMaster to verify stack redundancy is intact. Monitoring rxDiscards and txFails counters alongside rxPkts/txPkts on the inter-stack links would reveal a degrading stacking cable or port, since rising discards/failures without a corresponding traffic increase typically indicate a physical stacking interconnect problem.

Allied Telesis Virtual Chassis Stacking MIB for managing stack configurations and virtual chassis operations on Allied Telesis switches.