[70683] in North American Network Operators' Group
Re: fiber cut 19 May/PM -> 20 May/AM in Ashburn, VA (lawnmower?!)
daemon@ATHENA.MIT.EDU (Joe Abley)
Fri May 21 10:23:43 2004
In-Reply-To: <87fz9uq8wg.fsf@valhalla.seastrom.com>
Cc: Dan Armstrong <dan@beanfield.com>, nanog@merit.edu
From: Joe Abley <jabley@isc.org>
Date: Fri, 21 May 2004 10:23:04 -0400
To: "Robert E. Seastrom" <rs@seastrom.com>
Errors-To: owner-nanog-outgoing@merit.edu
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
