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Re: Points of Failure (was Re: National infrastructure asset)
From: Alex Bligh <alex () alex org uk>
Date: Tue, 25 Sep 2001 21:48:50 +0100




--On Tuesday, 25 September, 2001 1:18 PM -0700 Randy Bush <randy () psg com> wrote:

note that richer meshes may increase forwarding reliability but they
exacerbate routing convergence problems.  see abha's nanog presentation.

&, particularly where such meshes are formed in part from multiple
providers, the probability of the types of critical errors caused by the
failure of any one the providers (as opposed to those which require
all of the providers to go down). [trivial example: most people
don't filter their upstreams at all. if you have n upstreams, then
if any one gets hacked and decides to send 100,000,000 routes
at you, you die. Probability increases with n]

Alex Bligh
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