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The original specification of the BGP routing protocol, RFC 1105, from 1989, has the following directive: “NOTIFICATION messages are sent when an error condition is detected. The BGP connection is closed shortly after sending the notification message.” Ahh, you might think, that might be a potential problem, but the directive…
AUSNOG’23 was held in September. As usual, the meeting had a diverse collection of presentations on network technology, operational practices, engineering, and experiences. One of these presentations, by Cloudflare’s Tom Peseka, was on the subject of service routing, highlighting the ways in which today’s service platform attempt to optimise the…
I have on my desk a rather small tube. It’s a little under 2cm in diameter, 6 cm long, and looks like it’s made from a dull white polycarbonate material. At the end I can see a copper inner tube, and inside that another polycarbonate layer, and then a smaller…
OARC held a 2-day meeting in February, with a set of presentations on various DNS topics. Here’s some observations that I picked up from the presentations in that meeting. Cache Poisoning Protection Deployment Experience In a world where every DNS name is DNSSEC-signed and every DNS client validates all received…
I must admit that I’m a keen follower of the analysis work done by Jon Brewer. He manages to pull together excellent research with valuable insights, and I look forward to his presentations. Jon can be found at Telco2. The second half of this article, looking at the inventory of…
ISP Column – April 2022 AUSNOG was held in September 2021 December 2021 April 2022 in Sydney over two days. Here are a few notes from presentations at the meeting that I found interesting. Automating Network Management Network management was never the “sexy” part of the Internet. For decades network…
The RIPE community held a meeting in November. Like most community meetings in these Covid-blighted times it was a virtual meeting. Here’s my notes from a few presentations that piqued my interest. All the material presented at the meeting can be found at https://ripe83.ripe.net/. Vulnerability Disclosure Responsible Disclosure is a…
The network operations community is cautiously heading back into a mode of in person meetings and the NANOG meeting at the start of November was a hybrid affair with a mix of in-person and virtual participation, both by the presenters and the attendees. I was one of the virtual mob,…
It was only a few weeks back, in July of this year, where I remarked that an Akamai report of an outage was unusual for this industry. It was unusual in that it was informative in detailing their understanding of the root cause of the problem, describing the response that…
The telephone network had a remarkably clear overriding service objective: It had to sustain a human conversation. Now this must be able to carry a signal which is a human voice. To be discernible to human listeners, its necessary to carry audio frequencies of between 300 and 3,500 Hz. Most…
