DGS-3120-48TC-L2MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS-3120-48TC-L2MGMT-MIB

Organization: D-Link Corp.

Last Updated: 2010-03-03

Category: Technology: Switching/L2, Vendor: D-Link

Description: L2 management MIB for D-Link DGS-3120-48TC 48-port switch covering VLANs, STP, port security, and L2 switching features.

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What Is DGS-3120-48TC-L2MGMT-MIB?

DGS-3120-48TC-L2MGMT-MIB is a D-Link enterprise MIB providing the Layer 2 network-management structure for the DGS-3120-48TC 48-port managed switch, covering VLANs, Spanning Tree Protocol, port security, and other L2 switching features. It belongs to the enterprise switch-management category and exposes configuration and operational data for VLAN membership, STP topology/port roles, and port-security enforcement. It supports monitoring of software/configuration status by letting an operator confirm VLAN assignments are correct, that STP has converged with expected root/port roles rather than being stuck blocking, and that port security is enforcing configured MAC-limit or violation actions. It sits alongside the switch's companion Layer 3 management MIB and depends on the vendor's base enterprise MIB tree and standard bridge/STP concepts. It is typically deployed on D-Link DGS-3120-48TC switches in enterprise wiring-closet or campus access-layer deployments. Network engineers evaluating or troubleshooting this functionality can download the DGS-3120-48TC-L2MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS-3120-48TC-L2MGMT-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

  • D-Link DGS-3120-48TC managed switch

Monitoring Examples

No sample objects were supplied for this module, so specific object names cannot be confirmed; consistent with its description an administrator would poll VLAN membership tables to confirm a port is in its intended VLAN, check STP port-role/state objects to confirm a port isn't unexpectedly stuck in blocking state, and review port-security violation status to detect an unauthorized device attempting to connect to a secured port.

What Can Be Monitored

  • VLAN membership per port
  • spanning tree port role/state
  • port security violation status
  • L2 switching feature configuration
Imported Objects

From DLINK-ID-REC-MIB

AgentNotifyLevel

From PORT-SECURITY-MIB

swPortSecPortIndexOBJECT-TYPE

From RFC1155-SMI

Counter

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
TruthValue

From SWDGS3120PRIMGMT-MIB

dlink-Dgs3120Proj-Dgs3120-48TC
OIDs

RFC description

Layer 2 management MIB for D-Link DGS-3120-48TC managed switches, covering VLAN, IGMP, and port security features.

Start monitoring D-Link DGS-3120-48TC managed switch 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 DGS-3120-48TC-L2MGMT-MIB