History of Cisco

A routing idea that scaled far beyond a lab

In 1984 two Stanford computer scientists, Leonard Bosack and Sandy Lerner, turned a practical problem into a product that remade business networks. They had been part of Stanford’s computer operations and confronted the commonplace difficulty of linking distinct campus networks and different software protocols. Their solution was not a new application or a faster mainframe; it was a box that forwarded packets between disparate networks. That box and the software that ran it launched Cisco Systems, a company named for the bay city that framed the founders’ work. What began as a modest effort to connect university networks became the foundation of the commercial internet: the router, and the operating system that controlled it, redefined how organizations built networks.

Origins and founding (1984–1990)

Cisco Systems was founded in 1984 by Leonard Bosack and Sandy Lerner, two Stanford employees involved in the university’s computer operations. The company grew directly from practical work at Stanford: the early routers implemented protocols and techniques developed in the university environment, packaged as a product for institutions and enterprises that needed reliable interconnection. The name “Cisco” referenced San Francisco; the firm’s early logo drew on the city’s Golden Gate silhouette.

From the outset Cisco sold hardware and the specialized system software—later known as Cisco IOS—that controlled packet forwarding, access control lists and routing protocols. The combination of purpose-built appliances and software differentiated Cisco from general-purpose computing vendors and allowed it to move quickly into commercial markets that needed robust internetworking.

By the end of the decade Cisco had transitioned from a garage-and-lab startup to a public company: the firm went public on February 16, 1990. Product expansion and a run of acquisitions followed in the 1990s.

Early development: routers, IOS, and the enterprise market

In the company’s first years Cisco concentrated on improving packet routing for complex enterprise environments. Two technical elements mattered most: the Cisco Internetwork Operating System (IOS), which gave administrators a unified command set to configure routing and access; and routers that supported multiple network protocols at a time when customers ran Novell, DECnet and TCP/IP side by side. That combination—reliable forwarding across heterogeneous networks, controlled through a single software interface—made Cisco boxes the practical choice for corporate IT teams and service providers moving from isolated LANs to integrated, routed networks.

Customers in higher education, government labs and early commercial internet service providers provided reference installations. Those early deployments proved the basic market thesis: organizations would pay for equipment that made networks predictable and manageable. That technical credibility underpinned Cisco’s first decade of growth.

From routing to switching: Crescendo, Catalyst and the enterprise LAN (early 1990s)

The mid-1990s represent the first major turning point in Cisco’s history: the company moved beyond routers into LAN switching. In 1993 Cisco acquired Crescendo Communications, a small Bay Area firm that built high-performance Ethernet switches. Technology obtained through the deal led to Cisco’s first Catalyst switch in 1994 and established its entry into LAN switching.

Switching addressed a different part of the enterprise budget—the local area network rather than wide-area routing—and it placed Cisco’s products closer to every desktop and server. With Catalyst switches Cisco could sell an end-to-end architecture: core routers, distribution switching, and access-layer switches. The acquisition changed Cisco’s addressable market and sales pitch. No longer simply the supplier of backbone gear, Cisco became a vendor whose equipment touched every office and data center rack.

The dot-com era and the acquisition engine (mid-1990s to early 2000s)

Through the 1990s Cisco rode the surge in enterprise networking and the explosive growth of the public internet, combining organic product development with a steady cadence of acquisitions to broaden its portfolio. When an emerging market gained traction, Cisco often preferred to acquire an established vendor and fold its products into the Cisco sales channel.

History of Cisco’s acquisition strategy

The broad catalog made Cisco a one-stop supplier for many large customers, increasing deal sizes and customer stickiness. At the same time, the acquisition model brought integration challenges—product overlap, duplicated engineering effort and the work of harmonizing software and management frameworks—but it also accelerated Cisco’s reach into adjacent markets.

Market fallout and the dot-com bust

Cisco’s stock and public profile rose dramatically in the late 1990s and then fell sharply when the dot-com bubble burst around 2000. The crash exposed a second truth: a hardware-heavy vendor was vulnerable to sudden shifts in IT spending and to the financial shocks that follow speculative booms.

Consumer experiments and media ambitions (2003–2009)

In the 2000s Cisco pushed beyond enterprise networks into consumer and media businesses—moves that revealed both ambition and limits. In 2003 Cisco acquired Linksys, a then-familiar consumer brand for home Wi-Fi routers and small-office networking. Cisco had clear reasons: as home networks multiplied, consumer routers became an interface to customers’ broadband services and a channel for services tied to the home.

Cisco also pursued the cable-video market. In 2006 the company acquired Scientific-Atlanta, a major supplier of set-top boxes and cable-headend equipment. The deal signaled that Cisco viewed video distribution as an industrial-grade networking problem to be solved with its expertise in high-throughput systems.

At the same time Cisco bought WebEx in 2007, bringing an established web-conferencing platform into its collaboration portfolio. The WebEx acquisition proved durable: hosted collaboration became a recurring-revenue business that meshed with Cisco’s enterprise relationships.

Not every experiment worked. Cisco’s 2009 purchase of Pure Digital Technologies—the maker of the Flip video camera—ended poorly when smartphones absorbed the casual video market. Cisco exited the Flip Video camera product line in 2011 and recorded impairment charges associated with its consumer business and the Flip exit. The episode underscored a recurring pattern: Cisco could buy into markets quickly, but consumer product lifecycles and software-driven ecosystems sometimes outpaced a large networking vendor’s ability to adapt.

Major milestones in product strategy: IOS, Catalyst, and ACI

Several product-level shifts changed how customers bought and operated networks.

Cisco IOS: The company’s operating system became the common language across many routers and appliances, simplifying management and training for large IT organizations. IOS helped make Cisco equipment widely used in enterprise routing.
Catalyst switches: After Crescendo, Catalyst anchored Cisco in campus LANs and made switching a major revenue stream, expanding the company’s footprint inside customer networks.
Application Centric Infrastructure (ACI): In the 2010s Cisco embraced a data-center architecture that tied networking to application policies. ACI—part organic, part the result of key acquisitions and internal projects—was an effort to translate networking from box-level purchases into software-driven, policy-managed infrastructure suitable for cloud-era applications.

Leadership and organizational changes: Morgridge, Chambers, and Robbins

Leadership transitions at Cisco marked critical shifts in strategy.

John Morgridge joined Cisco in the late 1980s and served as chief executive as the company professionalized its management and moved to public markets. The most consequential long-term leader was John T. Chambers, who became CEO in 1995 and presided over two decades of expansion. Chambers emphasized sales execution, channel strength and acquisition-led growth; under his tenure Cisco expanded from a routing specialist into a broad networking, collaboration and security vendor.

In July 2015 Chuck Robbins succeeded Chambers as CEO. Robbins arrived from within Cisco’s ranks and signaled a different emphasis: accelerating a shift from one-time hardware sales to software and subscription services, simplifying product portfolios, and focusing Cisco’s engineering efforts on cloud, security and automation. That pivot was gradual but substantive—Robbins’ tenure reframed Cisco from a predominantly hardware vendor into a company that sells networks as software-enhanced systems plus recurring services.

Acquisitions that reshaped Cisco’s modern business

Cisco’s list of acquisitions is long; several deals were especially consequential in the 2010s and into the 2020s because they helped Cisco move from hardware to software and services.

Meraki (2012): Cisco bought Meraki to add cloud-managed networking to its portfolio. Meraki’s cloud-first approach gave Cisco a template for managed networking delivered from a centralized service plane.
Insieme Networks (2013): The Insieme team developed application-centric data-center infrastructure associated with Cisco’s ACI initiative; Cisco acquired the remaining interest it did not already own in December 2013.
AppDynamics (2017): Cisco purchased AppDynamics, a developer of application performance monitoring tools, to give customers visibility into application-layer behavior—an important capability as networks and applications converged.
Viptela (2017): The Viptela acquisition accelerated Cisco’s SD‑WAN offerings and addressed enterprise demand for cloud-delivered WAN services.
BroadSoft (2018) and Duo Security (2018): BroadSoft strengthened Cisco’s cloud-based collaboration and contact-center services; Duo added multi-factor authentication and endpoint security to Cisco’s portfolio, reinforcing a push into cloud security.
ThousandEyes (2020): ThousandEyes gave Cisco network and internet visibility as enterprises increasingly depended on cloud services and external paths beyond their own infrastructure.

These purchases illustrate Cisco’s strategy under recent leadership: acquire cloud-native software and services that can be sold on recurring contracts to existing enterprise customers, rather than relying solely on hardware refresh cycles.

Challenges, controversies and competitive pressure

Cisco’s history is also punctuated by setbacks and legal fights that shaped its trajectory.

After the dot-com collapse, Cisco’s revenue and stock fell sharply, forcing internal reassessments of growth assumptions. The company also endured the Flip-camera write-down, a cautionary episode about consumer hardware’s vulnerability to platform shifts led by smartphones.

Competition hardened on multiple fronts. In enterprise networking, companies such as Juniper and later Arista Networks challenged Cisco in data-center and campus environments. Cisco and Arista entered high-profile legal disputes in the 2010s over software features and alleged copying; those courtroom battles reflected how increasingly software-defined networking had become a battlefield for market share.

Security has posed another recurring test. As customer environments grew distributed—on-premises gear, cloud services and mobile endpoints—Cisco both invested in security products and faced scrutiny when vulnerabilities were discovered in network appliances. Those incidents pushed the company to tighten product maintenance and to present security as a core cross-product capability.

Recent development and Cisco today (2015–2024)

History of Cisco’s shift to software and subscriptions

Since 2015, under Chuck Robbins, Cisco deliberately shifted toward software, subscriptions and cloud-managed services while retaining hardware. The company restructured business units to align with cloud, security and collaboration and introduced platforms for intent-based networking and centralized management. Acquisitions such as AppDynamics, Viptela, Duo and ThousandEyes added cloud-native capabilities that could be integrated into larger Cisco offerings and sold on recurring contracts.

The COVID-19 pandemic in 2020 accelerated demand for secure remote access, collaboration and SD‑WAN; it also sped cloud migration and compressed enterprise budgets, pushing Cisco to move faster toward cloud models. Financial and organizational changes—adjusting sales compensation, licensing and reporting—have supported a gradual increase in software and recurring revenue while Cisco consolidated some consumer and hardware-focused businesses.

By the early 2020s Cisco had repositioned as a provider of integrated networking systems, security and observability, combining physical routers and switches with cloud-delivered management, security-as-a-service, and application visibility. The company’s legal identity remains Cisco Systems, Inc., and its brand continued to span networking hardware, software platforms and services sold to enterprises and service providers.

Legacy and significance

Cisco’s historical significance rests on a few concrete contributions.

It turned the router into a mass-market product for enterprises and service providers, accelerating the practical commercial deployment of internetworking.
Cisco IOS and the Catalyst line standardized management and operations across many customers’ networks, lowering the friction for IT teams to deploy and expand networks.
The acquisition-led expansion model—rapidly buying smaller vendors to enter adjacent markets—shaped an industry playbook for building broad product portfolios quickly.
More recently, Cisco helped normalize the idea that networks should be managed as software: policy-driven architectures, cloud-managed access, SD‑WAN, and application-aware networking all trace back to Cisco’s product directions and acquisitions.

Not all of Cisco’s experiments endured. The Flip camera became an early example of a large technology company misreading the pace of consumer platform change. Yet the company’s ability to supply core infrastructure for data centers, campuses and service-provider backbones meant its technologies became embedded in the operational fabric of the internet and business IT.

Conclusion

From two engineers wiring campus networks in 1984 to a multinational networking company, Cisco’s history is a story of technical focus expanded through acquisitive scale. The router and its operating system gave Cisco a beachhead; switching, voice, video and security broadened its reach. Periods of rapid growth were followed by harder lessons—the dot-com bust, failed consumer bets, and intense software competition—but each test forced the company to adapt. In the 2010s and early 2020s Cisco undertook a second, strategic transformation: shifting revenue models toward software and subscriptions, buying cloud-native companies to fill gaps, and recasting its long-standing hardware strengths into managed, policy-driven services.

That arc helps explain why Cisco still matters. It did not invent the internet, but it built many of the commercial tools that let organizations use it reliably. Its future hinges on whether a company long defined by physical boxes can keep translating those assets into software-first offerings that fit an increasingly cloud-centered world.