DNOS-PORTSECURITY-PRIVATE-MIB

Description: Manages port security MAC address limits and violation actions on Dell DNOS switch interfaces.

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DNOS-PORTSECURITY-PRIVATE-MIB is a Broadcom private MIB for Dell DNOS switches that manages port security, controlling how many MAC addresses are permitted on a switch port and what action is taken when a violation occurs. It exposes a global port security mode object and a per-port security table with learned/allowed MAC address limits and violation actions (e.g., shutdown, restrict, protect). While primarily a security/configuration MIB, it supports fault monitoring by letting administrators detect when a port has hit its MAC limit and been shut down or restricted, which shows up as an unexpected loss of connectivity on that port — effectively a hardware/link status symptom traceable to a security policy trigger. It is a vendor-specific private MIB dependent on the Dell DNOS agent and typically used alongside standard bridge/MAC MIB objects for full port/MAC visibility. It is deployed on Dell EMC DNOS access-layer switches to prevent MAC flooding and unauthorized device attachment, and administrators can download the DNOS-PORTSECURITY-PRIVATE-MIB file to load it directly into their MIB browser.

An admin would poll agentPortSecurityTable/agentPortSecurityEntry per port to see the configured MAC address limit and current violation action, then check agentGlobalPortSecurityMode to confirm the feature is globally enabled. A port that unexpectedly goes down can be diagnosed by checking whether its entry recorded a security violation (too many MAC addresses learned), rather than a cable or hardware fault. Reviewing agentPortSecurityGroup objects fleet-wide helps confirm consistent security policy across access ports.

Dell DNOS port security feature MIB for managing MAC-based port access control.