Thread

1. cube00 · 1790017251 · focus · HN ↗

   > When it went to flip into the backup, we discovered that the backup fiber had a break

   Pretty grim that a life critical system wasn't designed to report that the backup fibre was unserviceable until they attempted to switch over to it.

   I wonder how long it was down? Days, weeks, months?

   1. ranger_danger · 1790020511 · focus · HN ↗

      Besides what the others have said, speaking from a neteng perspective, sometimes backup lines (and the core infrastructure in general) are engineered in such a way that it can't easily be tested properly without taking other things down, or manually rolling a truck specifically to test it in isolation with extra equipment.

      Not saying that's what is going on here, just that it's possible.

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