North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: BBN outage
On Fri, 11 Oct 1996, Rob Liebschutz wrote: > I just spoke to their NOC and was told that a power switch that is > supposed to be able to switch them between 3 different power utilities > failed at 12:30 this morning (friday). They bought and installed 2 > large diesel generators today and are hoping to be back up using the > generators within 30 minutes. Perhaps there is a lesson in redundancy here. Based on this account it would appear that although they had arranged for 3 power sources that there were two mistakes made. One was that switching between sources relied on a single piece of hardware thus negating the redundancy of 3 sources. The other was that they did not have alternate types of power source, i.e. they did not have generators on site but expected that 3 different utility power sources was adequate redundancy. Some NOC engineers (or perhaps NOC managers) aren't paranoid enough. Michael Dillon - ISP & Internet Consulting Memra Software Inc. - Fax: +1-604-546-3049 http://www.memra.com - E-mail: [email protected] - - - - - - - - - - - - - - - - -
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