Enable LLDP on Windows Server 2016/2019

The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on a local area network based on IEEE 802 technology, principally wired Ethernet. The protocol is formally referred to by the IEEE as Station and Media Access Control Connectivity Discovery specified in IEEE 802.1AB and IEEE 802.3 section 6 clause 79. More info here

The following will install the DatacenterBridging feature and enable lldp and all interfaces:

Enable-WindowsOptionalFeature -Online -FeatureName 'DataCenterBridging'
Get-NetAdapter | Where-Object { $_.Name -like "*Ethernet*" -and $_.Status -eq 'Up' } | ForEach { Enable-NetLldpAgent -NetAdapterName $_.Name -Verbose }