DEC-ATM-CHASSIS-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsDEC-ATM-CHASSIS-MIB

Category: ATM, Vendor: DEC/Digital

Description: Manages ATM switch chassis hardware and slot configuration for Digital Equipment Corporation ATM systems.

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What Is DEC-ATM-CHASSIS-MIB?

DEC-ATM-CHASSIS-MIB is a legacy vendor-specific MIB from Digital Equipment Corporation for managing the physical chassis of DEC's ATM switch product line. It exposes chassis-level hardware identification (system type, keyswitch position), slot addressing (master and standby linecard slots), and per-slot card status and hardware revision information. This is a pure hardware-status monitoring MIB: it lets an operator verify which slot holds the active versus standby control card, confirm each installed card's type and status, and detect a card that has failed or is missing its expected module-physical (mod-phys) interface. It relies only on DEC's own private enterprise MIB extension tree (decMIBextension) rather than external standard MIBs. It would have been deployed in legacy DEC/Digital ATM switching gear used in enterprise or carrier ATM backbones during the 1990s. Network engineers evaluating or troubleshooting this functionality can download the DEC-ATM-CHASSIS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DEC-ATM-CHASSIS-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • Digital Equipment Corporation (DEC) ATM switch chassis

Monitoring Examples

An operator would poll decAtmSlotTable/decAtmSlotEntry, indexed by decAtmSlotIndex, to read decAtmCardStatus and decAtmCardType for each slot, confirming that the card physically installed matches the expected type and is reporting a healthy status. Checking decAtmMasterLinecardSlot against decAtmStandbyLinecardSlot after a failover event would confirm whether the redundant control card correctly took over mastership.

What Can Be Monitored

  • chassis system type
  • keyswitch position
  • master/standby linecard slot
  • per-slot card status
  • card hardware revision
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
IpAddress
enterprises

From RFC1213-MIB

DisplayString
OIDs

RFC description

DEC (Digital Equipment Corporation) vendor-private MIB for ATM chassis management; provides system-level monitoring for ATM network equipment.

Start monitoring Digital Equipment Corporation (DEC) ATM switch chassis (legacy) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download DEC-ATM-CHASSIS-MIB