LIVINGSTON-PM4-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › LIVINGSTON-PM4-MIB

Category: Vendor: Lucent/Ascend

Description: SNMP management MIB for the Livingston Enterprises PortMaster 4 remote access server, covering dial-up port and session management.

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What Is LIVINGSTON-PM4-MIB?

LIVINGSTON-PM4-MIB (registered under a Lucent/Livingston OID branch after Lucent's acquisition of Livingston Enterprises) is an SNMP module for the PortMaster 4 remote access server/router, covering chassis and dial-up port/session management. It exposes MIB revision and software revision identifiers, a chassis summary object, and a chassis command table used to issue and track management commands against specific boards, units, and devices within the chassis. This gives admins hardware/software status visibility into the PM4 chassis -- confirming which firmware/software revision is running, checking overall chassis summary health, and issuing board- or unit-level commands (e.g., resets) via the command table, which functions as a control-plane interface as much as a monitoring one. It defines its own proprietary Lucent/Livingston object tree (lucentPM4Mib, lucentPM4Traps, lucentPM4Chassis) rather than depending on other MIBs beyond standard SNMPv2-SMI conventions. It was typically deployed in dial-up/remote-access ISP and enterprise environments where PortMaster 4 chassis handled large numbers of simultaneous modem/dial sessions. Network engineers evaluating or troubleshooting this functionality can download the LIVINGSTON-PM4-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in LIVINGSTON-PM4-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

  • Lucent/Livingston PortMaster 4 remote access server

Monitoring Examples

An admin would check lucentPM4SWRev and lucentPM4MibRev to confirm software and MIB versions before automating management scripts, and poll lucentPM4ChasSummary for an overall chassis health snapshot. lucentPM4ChasCmdTable/lucentPM4ChasCmdEntry (keyed by lucentPM4ChasCmdIndex, with lucentPM4ChasCmdBoardId/lucentPM4ChasCmdUnitType/lucentPM4ChasCmdUnitIndex/lucentPM4ChasCmdDevId identifying the target) is used to issue and track chassis management commands against specific boards or units. An unexpected value in lucentPM4ChasSummary combined with a failed command status in lucentPM4ChasCmdTable would flag a board or unit needing manual intervention.

What Can Be Monitored

  • chassis summary status
  • software/MIB revision
  • per-board/unit command status
  • board and unit identification
Imported Objects

From LIVINGSTON-ROOT-MIB

lucentPM4OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC-1215

TRAP-TYPE

From RFC1155-SMI

Counter
Gauge
IpAddress
TimeTicks

From RFC1213-MIB

DisplayString
PhysAddress
sysName
OIDs

RFC description

Livingston (legacy remote access vendor) vendor-private MIB for the PM4 (Port Multiplexer 4) platform, managing port configuration and statistics.

Start monitoring Lucent/Livingston PortMaster remote access servers 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 LIVINGSTON-PM4-MIB