Cisco

Cisco Catalyst 3550 Series - WS-C3550-12T

Name: Cisco Catalyst 3550 Series - WS-C3550-12T
Brand: Cisco
SKU: EBAY_137475600713

Bottom line: The Cisco Catalyst 3550 Series is a specs-and-price decision rather than a crowd-consensus one in the retro networking cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-08-13

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Before you buy

Check the listed dimensions, connectors and platform compatibility against your setup before ordering
Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

Instant foam fills the surrounding spaces, creating a tight-fitting cushion that molds itself around the item, therefore providing a custom heavy-duty cushioning. (Pictured Below).

SpecPicks Verdict

SpecPicks scored Cisco Catalyst 3550 Series using a rating × review-volume × price-fit model applied to published specs and reviews across the retro networking cards category. Cisco's retro networking cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro networking cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Full Specifications

poe	false
layer	3
port_count	12
port_speed	10/100/1000
rj45_ports	10
uplink_type	GBIC
uplink_slots	2

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Cisco Catalyst 3550 Series - WS-C3550-12T is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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