A structured fiber optic cabling system configured to connect first and second layers of switches in a mesh network, the structured fiber optic cabling system comprising: a chassis configured to be disposed in an equipment rack; a plurality of fiber optic modules (180, 200, 300, 400) configured to be installed in the chassis in a side-by-side configuration, wherein each fiber optic module (180, 200) of the plurality of fiber optic modules comprises a first location comprising a plurality of first fiber optic ports, a second location comprising at least one second fiber optic port, a main body defining an internal chamber between the first location and the second location, and a plurality of optical fibers disposed within the internal chamber and arranged to establish optical connections between the at least one second fiber optic port and the plurality of first fiber optic ports, wherein for each fiber optic module, first fiber optic ports of the plurality of first fiber optic ports are distributed in a vertical direction when the fiber optic module is installed in the chassis; and a plurality of fiber optic jumper assemblies (193, 500) configured to connect the plurality of fiber optic modules (180, 200) to a plurality of second layer switches; wherein when the plurality of fiber optic modules (180, 200) are installed in the chassis and when the fiber optic jumper assembly (193, 500) connects the plurality of fiber optic modules (180, 200) to the plurality of second layer switches: each fiber optic jumper assembly (193, 500) includes a segment (195, 502) with a plurality of legs that emanate from the segment, and a plurality of fiber optic connectors that respectively terminate the plurality of legs, extending in a horizontal direction across the plurality of first fiber optic ports (183, 229), and each fiber optic connector of the plurality of fiber optic connectors is connected to a corresponding fiber optic port (183, 229) of the plurality of first fiber optic ports (183, 229) at the same vertical location in each fiber optic module (180, 200) of the plurality of fiber optic modules (180, 200). a chassis configured to be disposed in an equipment rack; a plurality of fiber optic modules (180, 200, 300, 400) configured to be installed in the chassis in a side-by-side configuration, wherein each fiber optic module (180, 200) of the plurality of fiber optic modules comprises a first location comprising a plurality of first fiber optic ports, a second location comprising at least one second fiber optic port, a main body defining an internal chamber between the first location and the second location, and a plurality of optical fibers disposed within the internal chamber and arranged to establish optical connections between the at least one second fiber optic port and the plurality of first fiber optic ports, wherein for each fiber optic module, first fiber optic ports of the plurality of first fiber optic ports are distributed in a vertical direction when the fiber optic module is installed in the chassis; and a plurality of fiber optic jumper assemblies (193, 500) configured to connect the plurality of fiber optic modules (180, 200) to a plurality of second layer switches; wherein when the plurality of fiber optic modules (180, 200) are installed in the chassis and when the fiber optic jumper assembly (193, 500) connects the plurality of fiber optic modules (180, 200) to the plurality of second layer switches: each fiber optic jumper assembly (193, 500) includes a segment (195, 502) with a plurality of legs that emanate from the segment, and a plurality of fiber optic connectors that respectively terminate the plurality of legs, extending in a horizontal direction across the plurality of first fiber optic ports (183, 229), and each fiber optic connector of the plurality of fiber optic connectors is connected to a corresponding fiber optic port (183, 229) of the plurality of first fiber optic ports (183, 229) at the same vertical location in each fiber optic module (180, 200) of the plurality of fiber optic modules (180, 200). each fiber optic jumper assembly (193, 500) includes a segment (195, 502) with a plurality of legs that emanate from the segment, and a plurality of fiber optic connectors that respectively terminate the plurality of legs, extending in a horizontal direction across the plurality of first fiber optic ports (183, 229), and each fiber optic connector of the plurality of fiber optic connectors is connected to a corresponding fiber optic port (183, 229) of the plurality of first fiber optic ports (183, 229) at the same vertical location in each fiber optic module (180, 200) of the plurality of fiber optic modules (180, 200).