In Spine and Leaf Design that involves the following:

8360 12-P 100G Spine Switches

8360 48-P 10G RJ45 Leaf Switches

100G SR4 Optical connections between Spine and Leafs

Spine Switches = 8360 12-port 100G QSFP28 (F-B airflow)

Each Spine Switch uses:

1 x 100G QSFP28 SR4 Optic to each Leaf switch

Each Leaf Switch uses:

1 x 100G QSFP28 SR4 Optic to each Spine switch

2 x 100G 1M DAC for ISL

1 x 10G RJ45 for Keepalive

Each Spine switch has 4 available 100G QSFP28 interfaces. What is the solution scalability?