Match the access role before comparing the platform
Extreme 5520-48W and Cisco C9300L-48PF-4X are useful representatives because both provide 48 Gigabit copper access ports. The important divergence is power: the 5520-48W offers 90W-capable ports, while the selected Catalyst is a PoE+ model. Neither model turns an attached multigigabit access point into a multigigabit wired connection.
For a closet of ordinary phones and modest-power access points, the Extreme model's higher per-port ceiling may be unused. For equipment requiring more than PoE+ can deliver, that ceiling becomes a qualification requirement. List the endpoint's required powered mode and link rate independently; choosing the correct power tier while missing the required copper speed still produces the wrong switch.
Fixed uplinks make one bill simpler and the other more flexible
C9300L-48PF-4X includes four fixed 10GbE SFP+ uplink interfaces. The 5520 uses a separately selected VIM, with supported choices including four 10GbE or four 25GbE interfaces. A 5520 chassis quote without its required VIM is not equivalent to a populated Catalyst quote.
That flexibility is valuable when the planned distribution layer can use it. It is less valuable if the closet has only existing 10GbE optics and no funded upstream change. Compare the completed path, including transceiver compatibility and fiber, and price a future VIM change against buying the required uplink tier initially. Higher interface speed does not eliminate a bottleneck on the next device.
| Decision | Extreme 5520-48W | C9300L-48PF-4X |
|---|---|---|
| Access rate | 48 Gigabit ports | 48 Gigabit ports |
| Per-port power capability | Up to 90W | PoE+ |
| Uplink hardware | Separately selected VIM | Four fixed 10GbE SFP+ |
| Shared power budget | Depends on ordered supplies | 890W with default 1100W supply |
| Data stack | Switch Engine design; different from Fabric Engine | StackWise-320; no StackPower |
The default power budget is a separate number
Cisco lists 890W of available PoE with the C9300L-48PF-4X default 1100W AC supply. Forty-eight 30W allocations would total 1,440W, so the standard supply does not support every port at that allocation simultaneously. The 5520's usable budget depends on the ordered supplies and power design; multiplying 48 by its per-port maximum does not describe the assembled switch.
Determine the normal load, the intended future load and the load that must survive losing a supply. Both families offer serviceable components, but that alone does not prove every endpoint remains powered in the degraded condition. Include the supply configuration in the approval record and label the actual AC feeds. Two supplies on the same failed circuit offer no circuit diversity.
Stacking is an operating-system decision
The Catalyst model uses StackWise-320 with the required stacking hardware. It does not provide the StackPower capability associated with other Catalyst 9300 configurations. The 5520's Switch Engine stacking design uses its dedicated high-speed connections; a Fabric Engine deployment is a different architecture. Do not carry the same stack assumptions across Extreme operating environments simply because the chassis can run either.
Firsthand Extreme campus discussions emphasize matching the operating environment to the existing network. Catalyst operator reports also show why stack-cable seating, member compatibility and software staging deserve attention. Neither set of accounts establishes a universal reliability winner. They point to the same useful acceptance exercise: introduce the replacement member using the procedure the support team will actually follow and verify traffic after a link or member interruption.
Our recommendation
Choose C9300L-48PF-4X when 48 Gigabit PoE+ ports, fixed 10GbE uplinks and the Cisco operating model satisfy the requirement. Choose 5520-48W when high-power endpoints, an upgradeable uplink module or an established Extreme architecture justify the additional configuration choices. If the real requirement is widespread multigigabit access, compare different access-port models in each family instead of trying to solve that need with either of these two.
In the final cost comparison, include software entitlement, the supported firmware version, spare supplies, stack components and the team's repair workflow. A larger feature inventory is only useful when the installation and support plan can turn it into a service the campus needs.
Onsite installation support
Need help deploying the technology you select?
Cartennas provides onsite installation, replacement, rack mounting, cabling, and Smart Hands support for business network equipment across the United States.
Request Installation SupportCartennas assessment
Cartennas favors Catalyst 9300L for a defined conventional Cisco access role and Extreme 5520 when its power and modular uplink capabilities satisfy a concrete requirement. Compare fully assembled configurations and a tested repair procedure before treating either as better value.
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.
- Cisco: Catalyst 9300 Hardware Installation Guide: Product Overview
- Extreme Networks: Extreme Networks 5520-48W 48-Port 90W PoE Universal Switch hardware features
- Extreme Networks: 5520-48W platform overview
- Cisco: Catalyst 9300 series data sheet
- Cisco: Catalyst 9300 StackWise system architecture
- Cisco: Configure and troubleshoot StackPower
Product information was checked on September 5, 2026. Specifications, licensing, warranty, availability, and pricing can change.
