Dlink-Dlf-MIB

Description: Manages D-Link Loop-back Detection (DLF) and related loop prevention features on D-Link switches.

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This D-Link private enterprise MIB manages Destination Lookup Failure (DLF, also called unknown unicast) traffic handling on D-Link switches, controlling how frames with unrecognized destination MAC addresses are egress-filtered per port. It exposes a single main configuration object listing the ports on which unknown-unicast egress filtering/DLF handling is applied. Its monitoring value is configuration-state verification rather than hardware health: confirming which ports are set to drop or forward unknown-unicast flood traffic, useful when diagnosing unexpected flooding or connectivity issues caused by DLF port-list misconfiguration. It has no significant dependency on external standard MIBs beyond general SNMPv2 conventions. It is deployed on D-Link managed switches in networks that want to limit unknown-unicast flooding to specific trusted ports for security or bandwidth-conservation reasons. Engineers can download the Dlink-Dlf-MIB file directly to load it into their MIB browser.

Reading rlDlfPortList lets an admin confirm exactly which switch ports have destination-lookup-failure (unknown unicast) egress filtering enabled, verifying that flood traffic is being restricted to the intended uplink or trunk ports. An unexpected port bitmask value can reveal a misconfiguration causing unwanted unicast flooding to access ports.

D-Link DLF (Dynamic Link Failover) ports private MIB for unknown unicast egress filtering configuration.