new Portfile lldpd: LLDP Daemon and client #27718
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herbygillot
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Feb 21, 2025
[lldpd](https://lldpd.github.io) is a daemon that implements LLDP and LLDP-MED. LLDP (Link Layer Discovery Protocol) is a link-local protocol—that is, it's limited to the physical Ethernet connection between one device and another—that devices use to exchange information about how they are connected, and what their capabilities are, from a Layer-1 and Layer-2 perspective. For example, say your Mac has a physical Ethernet connection that is plugged into a switch. If both sides support LLDP, the switch might tell you: * Its make, model, and OS. * The name of the switch, and its management IP address. * What type of Ethernet connections are supported (you may be on a port that can support 10-Gigabit Ethernet). * What VLAN you are on, and for tagged (802.11q) VLANs, what VLANs are being provided. It can be useful for sysadmins who are trying to figure out where an Ethernet cable goes (assuming you can unplug it): Plug one end into your Mac's Ethernet adapter, and within a minute you'll likely get the information. VoIP phones are prominent users of LLDP, identifying themselves as IP phones. Switches can react to this information by enabling VLAN tagging on a port, telling the phone which VLAN is to be used for voice traffic. These are examples of LLDP Media Endpoint Discovery (LLDP-MED). lldpd also implements several related protocols—such as the proprietary Cisco Discovery Protocol (CDP)—that have largely been supplanted by LLDP. There are three components: * `lldpd` is a daemon that connects to all supportable (Ethernet) interfaces, sending out LLDP messages and listening for incoming messages. It is launched via a LaunchDaemon. * `lldpctl` can be used to see what information is known about connected devices. * `lldpcli` can provide the same information as `lldpctl`, and can also be used to configure `lldpd`. Closes: https://trac.macports.org/ticket/50586 Closes: https://trac.macports.org/ticket/55122
herbygillot
reviewed
Feb 23, 2025
| machine (and reciprocally). | ||
| long_description lldpd is an 802.1ab implementation (LLDP) to help you \ | ||
| locate neighbors of all your equipments. Proprietary \ | ||
| protocols (like EDP and CDP) are supported. \ |
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Description
lldpd is a daemon that implements LLDP and LLDP-MED.
LLDP (Link Layer Discovery Protocol) is a link-local protocol—that is, it's limited to the physical Ethernet connection between one device and another—that devices use to exchange information about how they are connected, and what their capabilities are, from a Layer-1 and Layer-2 perspective.
For example, say your Mac has a physical Ethernet connection that is plugged into a switch. If both sides support LLDP, the switch might tell you:
It can be useful for sysadmins who are trying to figure out where an Ethernet cable goes (assuming you can unplug it): Plug one end into your Mac's Ethernet adapter, and within a minute you'll likely get the information.
VoIP phones are prominent users of LLDP, identifying themselves as IP phones. Switches can react to this information by enabling VLAN tagging on a port, telling the phone which VLAN is to be used for voice traffic. These are examples of LLDP Media Endpoint Discovery (LLDP-MED).
lldpd also implements several related protocols—such as the proprietary Cisco Discovery Protocol (CDP)—that have largely been supplanted by LLDP.
There are three components:
lldpdis a daemon that connects to all supportable (Ethernet) interfaces, sending out LLDP messages and listening for incoming messages. It is launched via a LaunchDaemon.lldpctlcan be used to see what information is known about connected devices.lldpclican provide the same information aslldpctl, and can also be used to configurelldpd.Type(s)
Tested on
macOS 15.3 24D60 arm64
Command Line Tools 16.2.0.0.1.1733547573
Verification
Have you
port lint?sudo port -vst install? --sudo port -vs installworks.sudo port -vst installdies with exit code 9 when trying to un-tar.