We hit half-million: The Cidr Report

Wed Apr 30 13:15:50 UTC 2014

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Le 29/04/2014 04:39, Valdis.Kletnieks at vt.edu a écrit :
> Do we have a handle on what percent of the de-aggrs are legitimate
> attempts at TE, and what percent are just whoopsies that should be
> re-aggregated?

Deaggs can "legitimatelly" occur for a different purpose : hijack
prevention (Pilosov & Kapela style).

It's fairly easy to punch a hole in a larger prefix, but winning the
reachability race while unable to propagate a more specific prefix
significantly increase hijacking costs.

For a less densely connected network (no presence on public IXPs, poor
transits...), renumbering critical services (DNS, MX, extranets) to
one of their /24s and de-aggregating it could be a smart move.
- -- 
Jérôme Nicolle

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