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Re: Cascading Failures Could Crash the Global Internet
From: "Rubens Kuhl Jr." <rkjnanog () ieg com br>
Date: Thu, 6 Feb 2003 20:02:57 -0200

BGP flap limiting may be correlated to this action... the good thing about
packets is that they don't require energy to be dropped; electricity needs
to be consumed somewhere, probably generating heat.


----- Original Message -----
From: "N. Richard Solis" <nrsolis () aol net>
To: "Sean Donelan" <sean () donelan com>
Cc: <nanog () merit edu>
Sent: Thursday, February 06, 2003 7:09 PM
Subject: Re: Cascading Failures Could Crash the Global Internet

| I don't know of too many electrical distribution networks that use DC
interconnection to limit AC failures from propogating.
| The main cause of AC disruption is a power plant getting out of phase with
the rest of the power plants on the grid.  When that happens, the plant
"trips" of goes off-line to protect the entire grid.  You lose some
generating capacity but you dont fry everything on the network either.
| http://www.nerc.com/
| There are some states that operate their own grids.  Texas, for example.
| -Richard
| Sean Donelan wrote:
|   Sigh, there are differences between tightly coupled networks, such as
|   the electric power grid and loosely couple networks like the Internet.
|   But there are also some similarities, such as electric grids use DC
|   interconnections to limit how far AC disturbances propagate; the
|   Internet uses AS interconnections to limit IGP disturbances from
|   propagating.
|   http://sci.newsfactor.com/perl/story/20686.html
|   The actual article requires payment to read

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