What do parrots and BGP routers have in common?


David Hauweele, Bruno Quoitin, Cristel Pelsser, Randy Bush


The Border Gateway Protocol propagates routing information accross the Internet in an incremental manner. It only advertises to its peers changes in routing. However, as early as 1998, observations have been made of BGP announcing the same route multiple times, causing router CPU load, memory usage and convergence time higher than expected.

In this paper, by performing controlled experiments, we pinpoint multiple causes of duplicates, ranging from the lack of full RIB-Outs to the discrete processing of update messages. To mitigate these duplicates, we insert a cache at the output of the routers. We test it on public BGP traces and discuss the relation of the cache performance with the existence of bursts of updates in the trace.

See the article on CCR online

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Today’s movie: Cafard

It’s been a long time since I last posted about a movie. Truth is, there are so many movies that I’ve seen since then that I wanted to talk about, but finally didn’t seem to find the time. So I postponed to the next week, and then to some week-end eventually and finally I didn’t post anything.

Actually it’s been so long that I’ll probably have to watch all those movies again before I can post about them. I don’t mind this though, and will probably watch them again anyway. But I really think I should post  ASAP and try my best to keep it short.

That was for the short update. Now for the movie…

Я люблю тебя

Я люблю тебя

Cafard by Jan Bultheel inspired by the true story of the Belgian ACM corps sent to Russia to fight the German army in 1915. Not a movie about war, if you ask me, or not only. But a great and colorful animation for adult.