One point of clarity here. Lightning talks are scheduled in a more spur of the moment fashion than the traditional submission process for general sessions. We often schedule lightning talks around a topic with potential to run short if Q&A isn't significant or we have a 15 minute gap before a break. Unfortunately that means dates, or times, have the potential to shift and flexibility is required by the party presenting. Randy was offered an alternative as soon as it was discovered the original time slot on Monday was not going to prove viable. Options later in the meeting were not chosen by Randy due to his schedule constraints. If a specific date is required on the NANOG agenda please consider submitting a presentation well in advance of posted deadlines for the general sessions. The NANOG PC does consider comments made in the tool at http://pc.nanog.org when scheduling the agenda. Short duration presentations have been accepted well in advance of the meeting for about a year now and we welcome interesting topics, much like Randy details below. We hope to see Randy back up at the microphone on stage at future NANOG meetings. Cheers! -ren On Tue, Jun 23, 2009 at 3:51 PM, Randy Bush <randy@psg.com> wrote:
due to nanog pc silliness, my lightning talk on $subject was not given in philly. i had promised to report to nanog the results of our winter experiment which used as path poisoning. here is the lightning talk i would have given.
http://archive.psg.com/090615.nanog-default.pdf
this is really meant to be a talk, so the slides can be a bit hard.
on slide 6 /20 is the as path length of a /20, i.e. a 'normal' distribution, as seen from bgp monitors at RV, RIS, and a jillion others /25 is the as path length distribution we saw pinging from the /25 BGP is the as path length distribution we saw from RV/RIS i.e. BGP views are significantly skewed. but most of us knew that.
on slides 10 and 11, the categories stub, small isp, large isp are from a ucla study. imiho, you should take them with a grain of salt.
on 12, the reason for the funniness around 30 test points is because, we really wanted >= 30 test points in an AS. so if we got close, we scanned harder to find them.
please do check your as at <http://psg.com/default/> and then actually look at your router config. i found one of my routers still had a default from when i was bringing it up.
randy