DGS-3420-26SC-L3MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS-3420-26SC-L3MGMT-MIB

Last Updated: 2016-06-14

Category: Technology: Routing/L3, Vendor: D-Link

Description: L3 management MIB for D-Link DGS-3420-26SC SFP switch covering routing, multicast, and advanced L3 management features.

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What Is DGS-3420-26SC-L3MGMT-MIB?

DGS-3420-26SC-L3MGMT-MIB is a proprietary D-Link enterprise MIB extending Layer 3 management for the DGS-3420-26SC SFP switch, covering routing, multicast, and other advanced Layer 3 management features. It exposes OSPF equal-cost multipath (ECMP) hashing configuration and system-wide route preference settings, mirroring the same object pattern used across the D-Link DES/DGS L3MGMT MIB family. Its monitoring value lies in verifying OSPF load-balancing behavior and understanding which routing source (static, OSPF, RIP, etc.) takes precedence on the switch, both of which affect end-to-end traffic paths and failover behavior. It implements IETF OSPF ECMP concepts as D-Link private enterprise objects rather than the standard OSPF-MIB. It is typically deployed on DGS-3420-26SC SFP-based switches used as Layer 3 aggregation or core switches in enterprise and metro networks. Engineers can download the DGS-3420-26SC-L3MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS-3420-26SC-L3MGMT-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-3420-26SC SFP switch
  • D-Link DGS-3420 series L3 switches

Monitoring Examples

An administrator would poll swL3OspfECMPCrcHigh and swL3OspfECMPTCPorUDPport to confirm the OSPF ECMP hash algorithm is configured to load-balance traffic across equal-cost paths as intended, and check swL3OspfECMPState to see whether ECMP is currently enabled. swL3RoutePreference would be checked to verify the relative preference assigned to different routing protocols, useful when diagnosing why a route from one protocol is being chosen over another. An unexpected swL3OspfECMPState value could explain traffic concentrating on a single path instead of being spread across multiple links.

What Can Be Monitored

  • OSPF ECMP hash configuration
  • OSPF ECMP enable state
  • route preference among routing protocols
Imported Objects

From IF-MIB

InterfaceIndex

From IPV6-TC

Ipv6Address

From OSPF-MIB

AreaID
DesignatedRouterPriority
HelloRange
Metric
PositiveInteger
RouterID
Status
TOSType
UpToMaxAge

From SNMPv2-SMI

Counter32
Integer32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
MacAddress
PhysAddress
RowStatus
TimeStamp
TruthValue

From SWDGS3420PRIMGMT-MIB

dlink-Dgs3420Proj-Dgs3420-26SC

How to Use in IPNetwork Monitor

Example using swL3ospfVirtIfEvents OID:

Select a D-Link DGS-3420-26SC SFP switch (L3) 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 swL3ospfVirtIfEvents 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 number of state changes or error events on this Virtual Link. 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

Manages Layer 3 routing configuration including IPv4, IPv6, OSPF, RIP, and DHCP on D-Link DGS-3420 switches.

Start monitoring D-Link DGS-3420-26SC SFP switch (L3) 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-3420-26SC-L3MGMT-MIB