Link-Layer Discovery Protocol is an industry standard protocol which enables network devices to exchange information about themselves with their neighbors connected over network links. This in turn can be used to locate other devices connected to a particular device and port.

The lldpd Debian package provides a lightweight lldpd daemon which implements this protocol and can be installed on Debian/Ubuntu based hosts to advertise the LLDP notifications to other devices. This might be useful in more complex environments with multiple layers of infrastructure comprised of physical hosts, virtual machines and containers.

The debops.lldpd role can be used to install and manage the lldpd service and by default will try to distinguish virtualized hosts (VMs, containers) from physical ones to make their management easier by changing their "ChassisID" attribute to reflect their virtualized status.