fiber cut 19 May/PM -> 20 May/AM in Ashburn, VA (lawnmower?!)

Joe Abley jabley at isc.org
Fri May 21 14:23:04 UTC 2004


On 21 May 2004, at 08:09, Robert E. Seastrom wrote:

> sonet, obviously, does not *have* to be in a ring, but it often is.
> unfortunately, a fair percentage of the time, the additional
> protection offered by a ring topology is a mirage, due to a
> configuration known as "collapsed backbone".  in this instance, both
> pairs of fiber ride in the same conduit for some portion of the
> distance

... or even as two wavelengths on the same pair of fibre.

It's a sick, sick, twisted world.


Joe




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