Not all switches support Logical Layering. Look for vendors that implement IEEE 802.1Qcz (the emerging standard for +L tagging). Leading brands like Cisco (Catalyst 9k series) and Arista have beta support.
To help you produce a paper, could you please clarify one of the following? fbsubnet+l
Why is this important?
By using fixed-block allocation, FBSUBNET+L drastically reduces the size of routing tables on core routers. Instead of hundreds of small /28 routes, routers see aggregated FBSUBNET+L superblocks. This speeds up packet forwarding and reduces CPU load on enterprise hardware. Not all switches support Logical Layering
(short 24-hour video/photo posts), you can find tutorials on how to create them directly in the Facebook app or manage them through the Facebook Help Center step-by-step guide fbsubnet+l