DGS3450-L2MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS3450-L2MGMT-MIB

Last Updated: 2000-07-15

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

Description: L2 management MIB for D-Link DGS-3450 48-port switch covering VLANs, STP, LACP, and L2 switching management.

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What Is DGS3450-L2MGMT-MIB?

This is a D-Link enterprise MIB providing Layer 2 switch management for the DGS-3450, a 48-port managed switch, covering VLAN configuration, Spanning Tree, and LACP link aggregation. It exposes VLAN membership, tagging, and port-forwarding configuration as manageable objects reflecting the switch's L2 forwarding plane. The primary monitoring value is verifying VLAN and L2 configuration state, such as whether ports are correctly tagged or untagged in a given VLAN, which helps catch misconfigurations affecting traffic segmentation rather than raw hardware faults. It extends the standard IETF 802.1Q model defined in Q-BRIDGE-MIB and BRIDGE-MIB with D-Link-specific VLAN and L2 objects. It is typically deployed in enterprise networks where a D-Link DGS-3450 switch requires detailed, vendor-specific VLAN visibility beyond standard bridge MIBs. Engineers can download the DGS3450-L2MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS3450-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-3450 managed switch

Monitoring Examples

An administrator can poll swL2VlanTable/swL2VlanEntry, indexed by swL2VlanIndex, to retrieve swL2VlanName, swL2VlanType, and swL2VlanMemberPorts for each VLAN defined on the switch. By comparing swL2VlanStaticTaggedPorts and swL2VlanStaticPorts against the live swL2VlanCurrentTaggedPorts and swL2VlanCurrentUntaggedPorts, an operator can spot a port that has fallen out of its intended VLAN membership, a typical symptom of a misapplied trunk configuration or STP topology change. swL2VlanForbiddenPorts can also be checked to confirm access restrictions are still enforced as configured.

What Can Be Monitored

  • VLAN membership per port
  • VLAN name and type
  • static vs. current tagged/untagged ports
  • forbidden ports
  • VLAN advertisement state
Imported Objects

From DLINK-ID-REC-MIB

AgentNotifyLevel

From RFC1155-SMI

Counter

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION

From SW34XXPRIMGMT-MIB

dgs3450OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using swL2PortBufferFullDrops OID:

Select a D-Link DGS-3450 managed switch as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type swL2PortBufferFullDrops into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The total number of packets discarded while buffer full. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

A D-Link Systems Layer 2 management MIB for the DGS3450 series switches. This MIB contains SNMP object definitions related to Layer 2 management functions, VLAN configuration, and switching operations for D-Link DGS3450 equipment.

Start monitoring D-Link DGS-3450 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 DGS3450-L2MGMT-MIB