DGS3426G-L2MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS3426G-L2MGMT-MIB

Last Updated: 2000-07-15

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

Description: L2 management MIB for D-Link DGS-3426G Gigabit switch covering VLANs, STP, and L2 management features.

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What Is DGS3426G-L2MGMT-MIB?

DGS3426G-L2MGMT-MIB is the D-Link proprietary Layer 2 management MIB for the DGS-3426G, the Gigabit-capable variant of the DGS-3426 switch family. Like its non-Gigabit sibling, it structures VLAN configuration and port-membership information used to manage Layer 2 switching behavior. It supports monitoring of VLAN state and port assignment consistency, which serves as a software-level health check on the switch's forwarding configuration rather than exposing physical sensors such as temperature or fan status. It relies on the same IEEE 802.1Q VLAN concepts as standard bridge MIBs, extending them with D-Link-specific objects. It is deployed in enterprise or campus networks where Gigabit-speed DGS-3426G switches handle VLAN-segmented access or distribution-layer traffic. Engineers can download the DGS3426G-L2MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS3426G-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-3426G Gigabit managed switch

Monitoring Examples

Polling swL2VlanTable entries (swL2VlanIndex, swL2VlanName, swL2VlanType) lets an administrator enumerate all VLANs configured on the DGS-3426G and their membership via swL2VlanMemberPorts. Comparing swL2VlanStaticTaggedPorts against swL2VlanCurrentTaggedPorts can reveal a port that failed to rejoin a tagged VLAN after a link flap. swL2VlanForbiddenPorts confirms that restricted ports remain excluded from sensitive VLANs, and swL2VlanAdvertisementState shows whether VLAN advertisement is enabled per VLAN.

What Can Be Monitored

  • VLAN membership per port
  • static vs current tagged/untagged port state
  • VLAN name and type
  • forbidden port assignments
  • 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

dgs3426gOBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using swL2PortBufferFullDrops OID:

Select a D-Link DGS-3426G Gigabit 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

D-Link DGS3426G Layer 2 management MIB; defines management objects for VLAN, port, QoS, trunking, and security configuration on switches.

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Download DGS3426G-L2MGMT-MIB