When should I choose a 10G aggregation switch?
When access closets already exist and you need to collect their fiber uplinks. Examples on this catalog: S6730-H24X6C and WS-C3850-24XS-E.
Is a 100G uplink enough to call it a leaf?
No. S6730-H24X6C has 100G-class uplinks and is still an aggregation PID. Leaf selection starts from server-facing ports.
Which guide covers this?
10G aggregation buying guide and the article 10G aggregation vs data-center leaf.
What do I send for a quote?
Exact PID, optic types, northbound speed, and stack size if the PID lists stacking. Use the RFQ form.