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Cisco Catalyst 9300X 24-port 25G SFP28 Switch, Network Essentials (C9300X-24Y-E)

Manufacturer identifier
C9300X-24Y-E
Variant
24-port 1/10/25G SFP28; modular uplinks; Network Essentials
Region
US
Verified
Official product page

This is a fiber model, not a faster PoE access switch

The C9300X-24Y-E has 24 SFP28 ports supporting 1G, 10G and 25G operation with compatible transceivers. It belongs in a different physical design from a copper PoE model serving phones and access points. The first decision is therefore the link medium and role, before comparing software or stack features.

Its appeal is the ability to keep a fiber-facing platform while moving selected connections to higher speeds. That does not eliminate the rest of the link: both ends, optics, fiber characteristics and configuration still determine whether a specific connection operates at the intended rate. The switch creates options; it does not make every existing optical path ready for 25G.

Dense edge capacity must be matched to traffic leaving the switch

Twenty-four ports at 25G represent 600Gbps of one-direction edge line rate. That is an arithmetic view of the ports, not a measured application throughput result. A compatible C9300X-NM-2C provides two 100G/40G uplinks, illustrating why the concentration ratio depends on the selected module and traffic pattern.

Not every workload needs all edge ports to transmit upstream at line rate simultaneously. Some traffic stays local; other deployments have short bursts or very uneven port utilization. Cartennas would make the concentration choice explicitly instead of presenting the largest front-panel number as the capacity of every path through the installation.

Operator experience exposes the details of a speed transition

In one firsthand C9300X deployment, an operator struggled to bring up 10G links using third-party dual-rate 10/25G optics. The discussion also uncovered confusion between the interface’s name and its configured speed. Other participants suggested different explanations, so the thread does not establish one proven hardware fault or a universal remedy.

The useful lesson is specific: a dual-rate label on an optic is not enough to validate the transition plan. The same transceiver, port configuration and far-end device need to work together at the intended rate. Keeping that evidence attached to the chosen optical parts is more valuable than treating all third-party optics as either universally compatible or universally defective.

Stacking and software remain part of the topology

C9300X uses the StackWise-1T architecture. That headline refers to the aggregate ring design and its forwarding behavior; it is not a dedicated terabit link for an individual server. The selected member mix, uplinks and failure path remain part of the actual capacity analysis.

Cisco’s current release guidance also needs to be considered alongside the optical and routing features in use. The -E suffix identifies Network Essentials, not a blanket entitlement to every advanced feature shown for the family. This platform is strongest when fiber density, future speed changes and Cisco operations all serve a defined topology, rather than when its largest numbers are used as a substitute for one.

Onsite installation support

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Cartennas assessment

Shortlist C9300X-24Y-E for dense campus fiber access or aggregation where 10G-to-25G growth is part of a real topology. Include the uplink module, exact optics and software features in the decision. For a straightforward copper endpoint closet, choose the model built for that job; for a different data-center fabric, compare the required architecture rather than the C9300X port count alone.

Cartennas analysis of manufacturer specifications, applicable technical documentation and available firsthand operating evidence. Review methodology. Cartennas provides product procurement and onsite services. Product review terms.

Official manufacturer information

Confirm the exact model, specifications, licensing, warranty, and support terms directly with the manufacturer.

Product information was checked on September 5, 2026. Specifications, licensing, warranty, availability, and pricing can change.