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Lldpd

Jul 20, 2023

LLDP (802.1ab)/CDP/EDP/SONMP/FDP daemon and SNMP subagent

LLDP Link Layer Discovery Protocol is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as Extreme’s EDP Extreme Discovery Protocol and CDP Cisco Discovery Protocol. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.

lldpd implements both reception and sending. It also implements an SNMP subagent for net-snmp to get local and remote LLDP information. The LLDP MIB is partially implemented but the most useful tables are here. lldpd also partially implements LLDP-MED.

lldpd supports bridge, vlan and bonding. Bonding need to be done on real physical devices, not on bridges, vlans, etc. However, vlans can be mapped on the bonding device. You can bridge vlan but not add vlans on bridges. More complex setups may give false results.

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