NMC-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › NMC-MIB

Category: Hardware Inventory, Network Management

Description: Manages network management controller configuration, status, and event reporting objects.

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What Is NMC-MIB?

NMC-MIB is a private enterprise MIB (its "usr"/"nas" object identifiers are characteristic of US Robotics/Livingston-style dial-up Network Access Server equipment) for a Network Management Card (NMC) providing system clock, dial-out, and event-notification configuration for a chassis-based remote-access or modem-pool system. It exposes objects for system time/date/timezone/GMT offset, daylight-saving handling, WAN dial-out phone number and modem AT command string, auto-configuration-on-power-up behavior, WAN dial retry count/pause/suspend timers, and an authentication-failure trap enable flag. For hardware/software status monitoring, it is mainly useful for confirming the NMC's clock is correctly synchronized (nmcCfgSystemTime/nmcCfgSystemDate/nmcTimezone) after a power event, and for verifying dial-out/retry behavior (nmcCfgNumWanRetries, nmcCfgWanRetryPause) is tuned so the NAS doesn't hammer a failed WAN dial-out connection. Its use of nmcCfgAuthFailTrapEnable implies it works alongside the device's standard SNMP trap/notification mechanism to alert on authentication failures. It is typically deployed on legacy dial-up/remote-access server chassis (NAS/modem pool equipment) in telecom or enterprise remote-access environments. Engineers can download the NMC-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NMC-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/Livingston-style dial-up Network Access Server (NAS)
  • modem pool/remote-access chassis

Monitoring Examples

An admin checks nmcCfgSystemTime/nmcCfgSystemDate and nmcTimezone/nmcDaySavingTime to confirm the NMC's clock is correct after a reboot, since a drifted clock would skew accounting and log timestamps. Enabling nmcCfgAuthFailTrapEnable causes the device to emit a trap whenever a dial-in authentication attempt fails, useful for spotting a brute-force attempt or a misconfigured user credential. If a WAN dial-out is failing repeatedly, nmcCfgNumWanRetries and nmcCfgWanRetryPause/nmcCfgWanRetrySuspendTime reveal whether the retry backoff is configured sensibly or is retrying too aggressively.

What Can Be Monitored

  • system clock/date/timezone setting
  • authentication failure trap status
  • WAN dial-out phone number and retry configuration
  • auto-configuration on power-up behavior
Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
Gauge
IpAddress
TimeTicks
enterprises
experimental

From RFC1213-MIB

DisplayString
OIDs

RFC description

Configures system time, date, and timezone settings on 3COM Network Management Card controllers.

Start monitoring US Robotics/Livingston-style dial-up Network Access Server (NAS) 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 NMC-MIB