lldpctl
displays Link Layer Discovery Protocol information collected by the lldpd daemon
TLDR
Display neighbor data
$ sudo lldpctl
Display help$ lldpctl --help
SYNOPSIS
lldpctl [options] [interfaces]
DESCRIPTION
lldpctl displays Link Layer Discovery Protocol (LLDP) information collected by the lldpd daemon. LLDP is used by network devices to advertise their identity, capabilities, and neighbors on a local network.
PARAMETERS
-f FORMAT
Output format: plain, xml, json, keyvalue-a
Show all interfaces including hidden-C PATTERN
Configure specific settings-L LOCATION
Set location information-h, --help
Display help information
INSTALL
sudo apt install lldpd
sudo dnf install lldpd
sudo pacman -S lldpd
sudo apk add lldpd
sudo zypper install lldpd
brew install lldpd
nix profile install nixpkgs#lldpd
CAVEATS
Requires lldpd daemon to be running. Root privileges needed for full functionality.
HISTORY
LLDP was standardized as IEEE 802.1AB in 2005 as a vendor-neutral discovery protocol, replacing proprietary protocols like Cisco CDP.
SEE ALSO
tcpdump(8)
