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. Rubens ----- 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 | http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000066 000006065102000001&idtype=cvips&gifs=Yes | | |