DGS-3420-52T-L3MGMT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DGS-3420-52T-L3MGMT-MIB

Last Updated: 2016-06-14

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

Description: L3 management MIB for D-Link DGS-3420-52T 52-port switch covering routing protocols, ACLs, and Layer 3 management.

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What Is DGS-3420-52T-L3MGMT-MIB?

DGS-3420-52T-L3MGMT-MIB is a D-Link enterprise MIB specific to the DGS-3420-52T 52-port managed switch, covering Layer 3 management functions such as OSPF routing behavior and access control lists. It exposes objects for OSPF Equal-Cost Multi-Path (ECMP) load-balancing hash configuration (including TCP/UDP port-based hashing and CRC-high settings) and general Layer 3 route preference settings used to arbitrate between routing information sources. Its monitoring value lies in routing/software configuration correctness: confirming ECMP hashing behavior and route preference settings match intended traffic-engineering policy, which affects how routed traffic is load-balanced and which routing protocol's routes are preferred, rather than exposing hardware sensors. It is layered on top of standard OSPF concepts (RFC 2328) as a vendor extension for ECMP tuning specific to this switch's ASIC/routing stack. It is deployed on D-Link DGS-3420-52T switches used as Layer 3 aggregation/distribution switches in campus or enterprise networks. Engineers can download the DGS-3420-52T-L3MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in DGS-3420-52T-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-3420-52T 52-port managed switch

Monitoring Examples

An administrator would check swL3OspfECMPState and swL3OspfECMPTCPorUDPport to confirm ECMP load balancing is enabled and configured to hash on TCP/UDP port fields, which affects how traffic is distributed across equal-cost OSPF paths. Comparing swL3RoutePreference against expected values would reveal whether a routing protocol precedence misconfiguration is causing unexpected route selection, for example static routes unexpectedly overriding OSPF-learned routes.

What Can Be Monitored

  • OSPF ECMP hash configuration
  • OSPF ECMP enable state
  • route preference settings
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-Dgs3420-52T

How to Use in IPNetwork Monitor

Example using swL3ospfVirtIfEvents OID:

Select a D-Link DGS-3420-52T 52-port managed 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

D-Link DGS-3420-52T Layer 3 management MIB for the 52-port Gigabit managed switch. Provides SNMP management objects for L2+ and L3 switching functions on D-Link xStack switches.

Start monitoring D-Link DGS-3420-52T 52-port managed 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-3420-52T-L3MGMT-MIB