A few years back I wrote a collection script for Cricket that calculated the 95th percentile data rate on an interface. I called it cricket-95.pl. Since then a PERCENTILE function has been added in the core rrdtool code. This article is my investigation on whether this function meets my needs.
In the aftermath of a spanning tree failure I found myself revisiting the IEEE ethernet standards documents. Specifically 802.1d and 802.1q. As I write this both are available as part of the Get IEEE 802 program, ymmv.
While reading the standards, and some related websites about tuning spanning tree parameters, I realised that there were a number of references to network diameter; however there was no precise definition of this term.
Cisco and Juniper both provide an option to easily strip private autonomous system numbers from outbound advertisements.
This article was started because I thought this aproach was flat out wrong; however during the research I managed to convince myself that it is the almost the right thing to do; just needs a couple of knobs to tweak to make it flexible enough to always do the right thing.
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