XKL & Packet Pushers: Internet History with Len Bosack

Introduction: 00:00:00

Scott Robohn introduces the episode of Total Network Operations, and sets the stage for a conversation with Len Bosack, co-founder of Cisco Systems and current CEO of XKL. He highlights Len’s significant contributions to networking technology and the commercialization of LAN technology, which laid the groundwork for today’s internet.

Early Career and Academic Background: 00:01:33

Len Bosack shares his journey from aspiring mathematician to engineer, explaining how he transitioned into computer science due to job availability in the 1960s. He recounts his time at Bell Laboratories and Digital Equipment Corporation, where he worked on the PDP-10, a popular compute server on the ARPANET. Len expresses his growing interest in networking, which led him to Stanford University, where he helped run research computing and developed one of the fastest computer network interfaces of the time.

Innovation at Stanford: 00:04:05

Len discusses the collaborative environment at Stanford, where he and his colleagues worked on the Stanford University Network Project. He describes the experience of using Xerox Alto IIs and how it influenced the future of personal computing. Len explains the development of the first router using the PUP protocol and reflects on the early days of networking, including the challenges they faced with broadcast storms and interconnecting systems.

Transition to Commercialization: 00:09:35

Scott and Len delve into the transition from academia to commercialization, with Len explaining how requests from peers for networking solutions led to the founding of Cisco in 1984. He shares anecdotes about navigating the challenges of starting a company and the support they received from ARPA, which encouraged the commercialization of their technology.

Technical Advancements and Protocol Development: 00:14:04

Len highlights the rapid advancements in networking technology during the 1980s, including the development of multi-protocol routers and the evolution of IP networking. He discusses the significance of the IETF and the challenges of standardization, particularly the debates surrounding link state versus distance vector algorithms. Len recounts the creation of BGP and its lasting impact on internet routing.

Inspiring the Next Generation: 00:31:20

In the final segment, Scott and Len discuss the importance of encouraging young people to enter the field of networking and technology. Len stresses the need for intelligence, energy, and a willingness to learn, while advocating for alternative pathways into the industry beyond traditional college programs. He reflects on the historical context of technological advancement and the need for mentorship to guide the next generation of engineers.

Current Challenges in Networking: 00:45:59

Scott and Len explore the current landscape of networking technology, focusing on the challenges of scaling beyond 800G. Len emphasizes the importance of addressing heat management and the limitations of existing technologies. He discusses the need for innovation in optical networking and the separation of data and control planes to enhance security and reliability.

Conclusion: 00:53:22

Scott wraps up the episode by summarizing the key insights shared by Len Bosack, emphasizing the rich history of networking technology and the ongoing challenges that lie ahead. He expresses hope that listeners will find inspiration in Len’s journey and the discussions around the future of networking.