Well, trying to explain that it was a network crippling change involving the BGP update, or DNS servers, etc would be VERY difficult...It will take some explaining, but it’s worth knowing, because BGP is at the heart of how the internet works, and it’s likely to have played a major role in the huge outage suffered by Optus and its customers since early Wednesday morning.
When you visit a webpage or send an email, the data you send and receive is broken up into smaller chunks of data, known as “packets”.
Each packet lists the network address of its sender, and the network address of its recipient. Network addresses are numbers, such as “8.8.8.8” (one of Google’s many addresses), that uniquely identify a company’s network on the internet.
But in order for a network provider such as Optus to know that packets destined for “8.8.8.8” need to be forwarded to the US, where they will be on-forwarded from network to network until, milliseconds later, they eventually make it to Google, networks around the world share with each other the addresses that belong to them.
https://www.copyright link/technology/what-early-signs-suggest-may-have-gone-wrong-at-optus-20231108-p5eig9
