ZYXEL-PRIVATE-VLAN-MIB

Description: Manages ZyXEL private VLAN configuration for subscriber port isolation within a shared broadcast domain.

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ZYXEL-PRIVATE-VLAN-MIB is a ZyXEL private enterprise MIB for private VLAN (PVLAN) configuration, a feature that isolates individual subscriber or host ports within a shared broadcast domain while still allowing them to reach a common uplink, placing it in the switching/subscriber-isolation configuration category. It exposes the mapping of primary and secondary (isolated/community) VLANs and each port's private-VLAN role, rather than hardware sensors or counters. Its monitoring role is mainly a configuration-correctness one: verifying that ports intended to be isolated from each other are indeed assigned to the correct secondary VLAN role, which is a security-relevant software-configuration check rather than a hardware health check. It builds directly on the switch's standard VLAN/bridge MIB (802.1Q VLAN model) as the base object this feature layers isolation semantics onto. It is typically deployed on ZyXEL access switches in multi-tenant, hosting, or subscriber-aggregation environments where hosts on the same VLAN must not be able to communicate directly with each other, and the ZYXEL-PRIVATE-VLAN-MIB MIB defines the per-port role objects used to verify that isolation policy.

An administrator would check the private-VLAN role assigned to a given port, such as promiscuous, isolated, or community, to confirm subscriber ports are correctly set to isolated so that peer-to-peer traffic between subscribers is blocked while uplink access remains available. If two subscriber ports that should be mutually isolated can still reach each other, inspecting their assigned private-VLAN roles would reveal a misconfiguration where one was left in a non-isolated mode. No sample objects were provided for this MIB, so specific object names are unconfirmed, but the functional check centers on per-port PVLAN role and primary/secondary VLAN mapping.

ZyXEL vendor-private MIB for private VLAN (secondary VLAN) management; manages isolated VLAN configurations and port associations on ZyXEL switches.