LLDP
LLDP is the standards-based neighbor discovery protocol for network devices.
Updated: 2026-03-05
Definition
Link Layer Discovery Protocol (LLDP) helps devices advertise identity and capabilities to neighbors.
It’s commonly used in multi-vendor environments for topology visibility.
Key points
- Standards-based neighbor discovery
- Useful for troubleshooting and inventory
- Can be limited/disabled for security
Common mistakes
- Assuming LLDP is always safe on untrusted interfaces.
- Not enabling it where topology visibility would help.
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