All MIBs › MARVELL-Dlf-MIB
Organization: MARVELL Semiconductor, Inc.
Last Updated: 2008-09-15
Category: Technology: Switching/L2, Vendor: Marvell
Description: Marvell Semiconductor MIB for Dynamic Loopback Filtering (DLF) configuration and monitoring on Marvell-based switches.
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What Is MARVELL-Dlf-MIB?
This is a Marvell Semiconductor private MIB for configuring Dynamic Loopback Filtering (DLF) on Marvell-based Ethernet switch silicon, controlling how unknown-unicast traffic is egress-filtered on specific ports. It exposes a per-port configuration table (rlDlfPortList) rather than broad system telemetry, focused narrowly on this one switching feature. Its monitoring/configuration value is in confirming which ports have unknown-unicast egress filtering enabled, which affects flooding behavior and can explain unexpected packet loss or unreachable hosts if misconfigured. It is a narrow, switch-silicon-specific MIB used alongside Marvell's broader switch management MIB suite (interfaces, VLAN, and entity MIBs) rather than any IETF standard. It is deployed on switches built on Marvell chipsets in data center and enterprise network environments where administrators tune Layer 2 flooding behavior for security or bandwidth control. Engineers can download the MARVELL-Dlf-MIB file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in MARVELL-Dlf-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
- Marvell-based Ethernet switch
Monitoring Examples
An administrator would poll rlDlfPortList to confirm which ports have DLF enabled after applying a switch-wide unknown-unicast filtering policy, verifying the setting matches the intended port list. If end hosts on certain VLANs become unreachable after a config change, checking this table can reveal DLF was inadvertently enabled on a port carrying multicast/flood-dependent traffic. This object is typically polled infrequently, mainly during initial deployment or troubleshooting of Layer 2 flooding issues.
What Can Be Monitored
- dynamic loopback/unknown-unicast filtering state per port
Imported Objects
OIDs
RFC description
Marvell switch unknown unicast egress filtering and port list management.
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