DGS3427-L2MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS3427-L2MGMT-MIB

Last Updated: 2000-07-15

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

Description: L2 management MIB for D-Link DGS-3427 switch covering VLANs, STP, LACP, and Layer 2 management objects.

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What Is DGS3427-L2MGMT-MIB?

This is a D-Link enterprise MIB providing Layer 2 switch management for the DGS-3427 managed switch, covering VLAN configuration, Spanning Tree, and Link Aggregation Control Protocol (LACP) features. It exposes configuration and operational-state data for VLANs, including membership, tagging, and forbidden ports, as part of the switch's Layer 2 forwarding behavior. Its main monitoring value is confirming the software configuration and operational status of VLANs and L2 features, such as which ports are currently tagged, untagged, or excluded from a VLAN, helping detect misconfigured trunks rather than physical hardware faults. It complements standard IETF bridging MIBs like BRIDGE-MIB and Q-BRIDGE-MIB, which provide the base 802.1Q VLAN model this module extends. It is typically deployed in enterprise or campus environments where a D-Link managed switch requires detailed vendor-specific VLAN and L2 visibility beyond what standard MIBs offer. Network engineers evaluating or troubleshooting this functionality can download the DGS3427-L2MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS3427-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-3427 managed switch

Monitoring Examples

An administrator can poll swL2VlanTable/swL2VlanEntry, keyed by swL2VlanIndex, to read swL2VlanName, swL2VlanType, and swL2VlanMemberPorts for each configured VLAN. Comparing swL2VlanStaticPorts and swL2VlanStaticTaggedPorts against swL2VlanCurrentTaggedPorts and swL2VlanCurrentUntaggedPorts reveals whether the switch's active port membership matches the intended static configuration, exposing STP-blocked or forbidden ports via swL2VlanForbiddenPorts. This lets an operator detect a port that has silently dropped out of a VLAN's active tagged set, a common cause of intermittent connectivity loss on trunk links.

What Can Be Monitored

  • VLAN membership per port
  • VLAN name and type
  • static vs. current tagged ports
  • forbidden/excluded 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

dgs3427OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using swL2PortBufferFullDrops OID:

Select a D-Link DGS-3427 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

Vendor-private MIB for D-Link DGS3427 switch; manages Layer 2 functionality including VLANs, port configuration, and switching features.

Start monitoring D-Link DGS-3427 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 DGS3427-L2MGMT-MIB