![](https://beehaw.org/pictrs/image/8820ce95-9549-4a4c-b3d9-920a4b15e5e5.png)
![](https://beehaw.org/pictrs/image/c0e83ceb-b7e5-41b4-9b76-bfd152dd8d00.png)
Yeah sounds like it was something similar. CloudFlare showed spikes in BGP announcements (the Border Gateway Protocol - basically how each network node knows it’s neighbours and the route through that neighbourhood) when the system went down. So Optus stopped telling the world it existed and everything updated around it, shutting it out from the internet.
+1 for Fira Code