Imagine you’d like to write a simple Perl (or Python, Ruby, JavaScript – you get the idea) script to automate a burdensome function on your server (or router/switch from any vendor running Linux/BSD behind the scenes) that the vendor never bothered to implement. The script interpreter relies on numerous APIs being available from the operating system – from process API (to load and start the interpreter) to file system API, console I/O API, memory management API, and probably a few others.
Now imagine none of those APIs would be standardized (various mutually incompatible dialects of Tcl used by Cisco IOS come to mind) – that’s the situation we’re facing in the SDN land today.
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