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

[Joe Abley <jabley () isc org>]

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