CHS-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCHS-MIB

Category: Device Management, Hardware and Environment

Description: Manages chassis slot and module inventory providing physical hardware configuration for chassis-based network devices.

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What Is CHS-MIB?

CHS-MIB is a chassis-inventory MIB from US Robotics, identifiable by the 'usr'/'nas' object-tree prefixes in its objects, covering physical slot and module inventory for USR's Total Control/NetServer-class network access server (NAS) chassis. It exposes a per-slot table describing which module type is installed, its description, hardware/firmware version, serial number, and product code, plus a last-change timestamp for slot state transitions. This makes it a hardware inventory and status MIB: administrators use it to confirm which cards are physically present in each slot, detect module swaps or removals via uchasSlotLastChange, and verify firmware/hardware revisions and serial numbers for asset tracking and support cases. It is part of the broader USR NAS MIB family alongside modem and interface MIBs for the same chassis. It is typically deployed on USR Total Control/NetServer dial-up or broadband access chassis in carrier or enterprise access rooms. Engineers can download the CHS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CHS-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

  • US Robotics Total Control/NetServer chassis (network access server)

Monitoring Examples

An administrator would poll uchasSlotTable / uchasSlotEntry keyed by uchasSlotIndex, reading uchasSlotModuleType, uchasSlotModuleDescr, uchasSlotModuleVersion, and uchasSlotModuleSerialNumber to build an inventory of installed cards. A change in uchasSlotLastChange combined with a different uchasSlotModuleSerialNumber than previously recorded indicates a card was swapped, prompting a check of uchasSlotModuleProductCode against expected part numbers. uchasSlotStatFeEna and uchasSlotFeKey give front-end/feature enablement status for the slot's module.

What Can Be Monitored

  • installed module type per slot
  • module firmware/hardware version
  • module serial number
  • module product code
  • slot last-change timestamp
  • front-end feature enablement status
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
Gauge
IpAddress
TimeTicks
enterprises
experimental

From RFC1213-MIB

DisplayString
OIDs

RFC description

USR chassis management MIB for hardware slots, modules, and component configuration.

Start monitoring US Robotics Total Control/NetServer 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 CHS-MIB