At the recent Joint Techs conference, our host Stanford University arranged a lunch time tour of the Stanford Linear Accelerator Center (SLAC) for a small group of attendees. I signed up early as I knew it was going to popular with this crowd. SLAC is a 50 GeV electron-positron accelerator …read more
The World IPv6 Launch website has compiled a set of measurements at http://www.worldipv6launch.org/measurements/. I'll take a quick look at some of them here, with a focus on universities.
The "Network Operator measurements" include data collected by Google, Facebook, and Yahoo! for access to their services on …read more
We have two job openings at the University of Pennsylvania for Network Engineers.
1. Network Engineer or Senior Network Engineer
This position is part of our Network Operations group which deploys and operates Penn's production campus network (data/voice/video), and …read more
I've been working on a DNS and DNSSEC monitoring project, which is available at
It looks at externally visible features of the authoritative DNS service at a selected set of institutions. The original version monitored the roughly 200 members of Internet2. It was mostly …read more
World IPv6 Launch (June 6th 2012) is fast approaching, so I thought I'd share some details about IPv6 deployment at the University of Pennsylvania and what we've recently done to prepare for this event.
A quick history
Penn runs a regional network called MAGPI, which connects Research & Education (R&E …read more
Some data from a quick analysis of the contents of the University of Pennsylvania's primary DNS zone (upenn.edu):read more
Zone: upenn.edu. Total RR = 624221 Total RR = 159928 (excluding DNSSEC records) Total RRsets = 464295 Total RRsets = 155165 (exluding DNSSEC records) Total Names = 154570 TTL min, max, avg = 0, 114000, 38562 …
I'm teaching two half day classes on IPv6 and DNS/DNSSEC at the LOPSA PICC conference (Professional IT Community Conference), being held May 11-12, 2012 in New Brunswick, NJ. This is a regional IT and system administration conference run by the New Jersey chapter of the League of Professional System …read more
A colleague on her office door, has a picture of a famous New Yorker cartoon, in which one dog says to another, "I had my own blog for a while, but I decided to go back to just pointless incessant barking". Well, I finally decided to join the barking classes …read more
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