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. toast0 · 1790018021 · focus · HN ↗

      Sometimes your multiple fiber paths end up in the same bundle, severed by the same backhoe. It's always a fun day when that becomes apparent.

      1. Havoc · 1790027208 · focus · HN ↗

         >Sometimes your multiple fiber paths end up in the same bundle

         For mission critical stuff like airports I would like to think they're go for a more rigorous methodology than hope for the best on paths

         1. iso1631 · 1790063230 · focus · HN ↗

            We have a faction at work who are all about the outsourcing. "We contract with supplier A to prevent single points of failure"

            Then there's another faction that doesn't trust a word suppliers say, who will insist on two different suppliers, as while in theory they could be sharing the same routes, it's far less likely.

            Comes down to "do you trust contracts".

            Of course this is for third tier sites like branch offices. Major sites require far more oversight, including visibility of cable routes and any hops on the internal network

Unofficial Hacker News client; not affiliated with Y Combinator.