TN-LLDP-EXT-MIB

Description: Manages Transition Networks LLDP extension TLV configuration and neighbor attributes.

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This Transition Networks MIB extends the standard IEEE 802.1AB LLDP MIB with vendor-specific TLV configuration, including CDP-awareness settings, for TN managed switches. It exposes per-port LLDP extension configuration data rather than raw neighbor discovery tables, layering vendor options on top of the base LLDP framework. It supports monitoring of the software/protocol configuration state of neighbor discovery, in particular whether a port is configured to also recognize legacy Cisco Discovery Protocol (CDP) frames alongside standard LLDP. It explicitly depends on the standard IEEE 802.1AB LLDP-MIB, which it extends rather than replaces. It is typically deployed on Transition Networks managed switches that interoperate with mixed Cisco/non-Cisco neighbor-discovery environments, where the TN-LLDP-EXT-MIB MIB is loaded to enable this vendor-specific LLDP extension.

An admin would check the tnLldpExtPortConfigTable (tnLldpExtPortConfigEntry) per port to confirm whether lldpPortConfigCdpAwareEnabled is set, which determines if the switch will also parse incoming CDP frames on that port. If a neighboring Cisco device's information isn't being learned as expected, verifying this flag is a first troubleshooting step. This module supplements rather than duplicates the neighbor tables of the base LLDP-MIB.

Transition Networks LLDP extension MIB; vendor-private LLDP enhancements for managed switches and media converters.