For over a decade Dr. Lavian served as a principal scientist, architect and senior software engineer at Nortel Networks, where he designed software for switches, routers, and network communications devices and developed systems and architectures for managing them. Similarly, his doctorate in computer science from UC Berkeley focused on communication networks. Routing and switching are thus a natural fit for his expert witness practice.

There are cases where analyzing the behaviors of packet switching and routing is an integral part of the litigation. Furthermore, there is a need to understand networking principles, routing algorithms, software and hardware architectures, ASIC, firmware, high-speed backplanes, control plane, data plane, blocking and none-blocking architectures, priority queuing, time-to-live, packet addressing, routing and switching table structures, just to name a few. Dr. Lavian has both the academic background as well as industry experience to analyze and review the technical aspects of routing and switching for patent validity or infringement, and if required in the broader contexts of cloud architectures, Internet protocols, wireless networking and unified communications.

In particular Dr. Lavian is an expert on LAN, WAN, VPN, routing protocols, RIP, BGP, MPLS, OSPF, multicast, DNS, QoS, switching, packet switching, layer 2 switching, layer 3 switching, layer 4 switching, routing, gateways, tunneling, as well as the detailed IETF RFC standards defining the relevant functional architectures, protocol specifications as well as forwarding and routing algorithms.

Dr. Lavian served as a Principal Investigator for projects at the Defense Advanced Research Projects Agency (DARPA) of the US Department of Defense, including a research project for the US Air Force Research Lab (AFRL) involving routing and switching in optical SONET and DWDM high-speed networks. As an academic and industrial researcher, he has developed systems and architectures for switches, routers and network management.

Selected Publications – Routing and Switching

Scientific publications co-authored by Dr. Lavian on the subject of routing and switching:

Selected Presentation – Routing and Switching

Presentations and lectures by Dr. Lavian on the subject of routing and switching:

Dr. Lavian provides expert witness services to his clients in the area of routing and switching.

  • Thanks to his longstanding academic and industry experience, Dr. Lavian can analyze and review routing and switching patents for validity or infringement and, when required, assess them in the broader context of cloud architectures, Internet protocols and wireless networking and unified communications.

Select Law Firm Clients (re: routing and switching cases)

  • Durie Tangri
  • Skadden, Arps, Slate, Meagher & Flom
  • Cooley
  • Kirkland & Ellis
  • Irell & Manella
  • Faegre Baker Daniels
  • Keker & Van Nest
  • Finnegan, Henderson, Farabow, Garrett & Dunner

Select Corporate Retainer Clients (re: routing and switching cases)

  • Huawei
  • Cisco Systems
  • Hewlett-Packard
  • Juniper Networks
  • Palo Alto Networks
  • Comcast
  • Morgan Stanley (Cisco Routers in NYSE)