Reconfigurable wireless data center network using free-space optics

A reconfigurable free-space optical inter-rack network, comprising:

• a plurality of server racks, each including at least one switch mounted on a top thereof;
• wherein each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch;
• a plurality of ceiling mirrors above the plurality of server racks, wherein each of the plurality of ceiling mirrors has an area that is smaller than an area of the top of a server rack, wherein each single ceiling mirror redirects optical connections between one or more pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors;
• and
• a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.