In 2001 I completed my Ph.D., ”Internet Traffic Engineering” with the Systems Research Group at the University of Cambridge Computer Laboratory. Since then I have worked as a researcher with the IP Group, Sprint ATL; the Systems & Networking Group, Microsoft Research Cambridge; and most recently I was founder at Vipadia Limited.
I left Microsoft to become founder at Vipadia Limited, a small voice-on-IP consultancy based near Cambridge. With my co-founder I designed and implemented the company’s two main products:
Clackpoint was written up in TechCrunch and on Google’s SocialWeb Blog. As well as the public website, Clackpoint was available as a gadget for Google’s OpenSocial and Google Wave, as a custom plugin for the HotCRP conference management system, and as a plugin for Atlassian Confluence. Two months after launch it had been installed on around 1000 websites, was serving 6000 users/day (120,000 unique/month) from over 180 countries, and handling over 600,000 minutes/month. Acquisition of both Clackpoint and Karaka by Voxeo Corp. was announced in January 2010.
I also undertook contracted development for several clients on a range of topics including integration of CTI with Microsoft Dynamics; website development in Python/Django; and telephone control of home automation systems.
In addition I was responsible for organising and implementing collection of the first large-scale enterprise network trace. This comprised 2 years of OSPF routing data, and collection of around 13 billion packets over 4 weeks from Microsoft’s corporate backbone network. I also developed the F# parsing library used to process these traces.
Following my Ph.D., I spent several months with the IP Group at Sprint’s Advanced Technology Lab in California. While there I produced software to collect and analyse routing data from Sprintlink, Sprint’s tier-1 IP backbone, running live for over 3 years without problems. This code and data found many uses, notably some of the earliest published analyses of the link failure and routing loop behaviour of large IP networks. I also worked with the systems group on topics ranging from predicate routing to novel network management techniques.
During my Ph.D. I spent several weeks as a consultant to Cplane, a California-based startup developing novel network control software. I integrated Cisco’s Virtual Switch Interface Protocol with their network control platform.