Chapter 1
The Network Programmability and Automation Ecosystem
We all have that one story we tell on ourselves about some stupid mistake that brought down a network segment or even an entire network. Here’s mine.
Thirty years ago, I was sitting in an office in Albuquerque, logged in to a router in Santa Fe, making some minor, supposedly nondisruptive modifications to the WAN interface. I wanted to see the changes I had made to the config, and I got as far as typing sh of the IOS show command before realizing I was still in interface config mode and needed to back out of it before entering the show command. But instead of backspacing or taking some other moderately intelligent action, I reflexively hit Enter.
The router, of course, interpreted ...
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