Introduction

The YANG data modeling language [RFC7950] and the associated protocols NETCONF [RFC6241] and RESTCONF [RFC8040] use a naming scheme that essentially consists of tuples of the form (module, path). The tuple (ietf-system, /system/contact) is an example uniquely identifying the leaf /system/contact in the YANG data tree of the module ietf-system. (The module may be identified by the module name or a module namespace but since there is 1:1 mapping between the two, the difference is not relevant for the discussion here and we simply use the module name.)

While reading Geoff Huston’s excellent article “DNS Privacy and the IETF” (Internet Protocol Journal 22(5), July 2019), I came across the term ‘surveillance capitalism’, coined by Shoshana Zuboff (Harvard Business School in Cambridge).

The software crisis in the late 1960 and early 1970s was driven by the challenge of creating useful and efficient computer programs in a planned engineering process, that is in a well defined amount of time and with predictable costs. Software engineering has evolved as a discipline since then and we have far better tools and techniques in place today for a systematic, disciplined, quantifiable approach to the development, operation, and maintenance of software. Nowadays, we face a new crisis, let me call it the cybersecurity crisis, which is triggered by the need to build systems that deliver service that can be justifiably be trusted even in the face of malicious attacks.

I just read (again) Henning Schulzrinne’s reflections about where computer networking research stands in the middle years, titled “Networking research — A reflection in the middle years”. I may not agree with everything said in the paper but there is a lot of very good insight and truth in Henning’s paper.

I have attended a seminar discussing how to encourage reproducability in scientific research of the Internet. Obviously, everybody agrees that it is desirable that research findings are reproduced by independent studies (and I mean reproduced and not just repeated although repeated is more than nothing). The question, however, is how to get there. For me this is largely an issue of incentives and I am sure there are a couple of things that can be done to increase incentives to reproduce research. I particularly liked the idea to organize repathons, reproducability hackathons where students reproducing work can meet authors of papers they are trying to reproduce and I believe research funding organizations will need to use their power to make it easier to reproduce researchs.

I am following up on my previous post on this topic, which was focusing on issues related to the timely development of YANG modules. There are other key factors that determine the speed in which work completes and that are often ignored in the IETF when people discuss work to be taken on and define milestones.

A big part is the management of the human resources. Yes, this may sound strange give that the IETF is a volunteer organization and hence does not directly “control” human resources. But still, if a WG starts a new project, the WG and the WG leadership should be clear about the resources that are needed to finish the project. In particular, the following matters a lot:

My 42nd RFC has been published and it got the number RFC 8342. Despite the funny number, I believe this is one of the more important RFCs I have worked on since it tells us how to think about configurations and their relationship to operational state. A few more RFCs will appear during the coming weeks providing the technology extensions that allow us to use the new framework in practice. Work on this document started with a trip to Stockholm in May 2016 but the discussions have a much longer history and it feels good to have them settled and the document published.

I am using a Garmin running watch, meanwhile seven years old. I had to replace the battery once but otherwise it just works. But recently, Apple decided to remove the serial driver code for this running watch from Mac OS High Sierra and hence I am not able to read out data anymore. Luckily, someone wrote a Linux command line utility some time ago to read out the data from Garmin watches (the tool is currently broken on newer versions of Ubuntu but people seem to be working on fixing this). This story is another example demonstrating that it is only open source tools that you can rely on longterm. This is where open source really shines: as long as a program is doing something useful for some people, someone will step up and maintain and fix it or even improve it. Commercial software simply gets unusable due to business decisions. And many people in the software industry do not care about long term data archives - except those companies that like to get your data in order to turn data into valuable assets of their own. I will now extract all my GPS running date from various programs I have used over time into a common format, say good bye to closed source running applications, and contribute some patches to open source programs.

I observe that people at a certain age get enthusiastic about creating rules in an attempt to make this a better world, or to improve engineering, or to organize people more efficiently, or whatever they love to create rules for. And then I observe that people further down the road of life get more relaxed again, most likely they learned that long catalogues of rules simply do not achieve much (the more rules there are, the less likely it becomes that they will be read, understood, and followed). Yes, I have done my own experiments in this space as well - after all, it is good to have experimental evidence, no?

We recently had a storm in the nothern part of Germany - not very unusual in Fall. Three days later I wanted to go home by train via Hannover. There were still some train tracks closed but the train company offered an ‘alternative connection’. Before entering the alternative connection train in Hannover, travelers were informed that they would receive more information in the train. (If you happen to know the German train system, you will know that people working on the trains usually have the least information.) Before arriving at the station in a small village where the train had to end due to closed tracks, travelers got told that there will be a connecting bus service. Upon leaving the station, there was no bus service nor anybody to talk to. Just rain.