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A comment on Whiteboards used after Gatwick flight information screens fail. Parent comment

Re:Whiteboards used after Gatwick flight information screens... by lakisy on Monday August 20, 2018 @12:38PM (#17801400)
Some years ago, we lost access to our data center although it had triple network redundancy. What happened was that three cables were leaving the DC leased by three different companies. But a mile down the road, all three different cable entered the same physical pipe. When the physical pipe was severed, all three network cables went dark. We should wait until they announced details of what happened before we decide that we know what happened and offer solution ("If they only had redundant links")
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Re:Whiteboards used after Gatwick flight information screens... by lgeorget on Monday August 20, 2018 @01:02PM (#17801625)
If my memory serves, one requirement of high-tier datacenters is that they have redundant electric lines leaving the building from opposite sides and in opposite directions. I guess it must be the same for optic fibers.

I fully agree with you on your last sentence. One should wait for a bit more than a vague declaration reported in a newspaper before giving unsolicited advice.

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Re:Whiteboards used after Gatwick flight information screens... by mmt on Monday August 20, 2018 @07:26PM (#17805094)
> high-tier datacenters

How many people (even tech ops profesionals), these days, know how to tell the difference? Of those that do, how many don't just keep their mouth shut because their bosses don't want to hear it?

These details are just trusted to "the cloud", instead.

Of course, the airport itself isn't a datacenter of any tier, and that "last mile" can be the biggest redundancy challenge, anyway.

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Re:Whiteboards used after Gatwick flight information screens... by hermitdev on Monday August 20, 2018 @05:27PM (#17804149)
Yes, they leave different ends/sides of the building, but you don't have much control on where they have utility right of way and whether or not at some point all of your lines share the same right of way (which is likely).
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Re:Whiteboards used after Gatwick flight information screens... by fulafel on Tuesday August 21, 2018 @01:50AM (#17807312)
I have heard this story before, with a twist that initially it was checked for, but the telcos changed it back some years down the road. I wonder what's a good way to audit this.
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