Chapter 5: Model-Driven Programmability with NETCONF and ncclient
In previous chapters, we learned how to connect to a network device and either retrieve or change the configuration of our device using the same CLI commands that we can also issue manually. Now, let's take a step back and examine what we are actually doing when we issue configuration commands. Fundamentally, a device has a certain state, which is the sum of all the configuration variables and their values. Every time we issue a command, we either retrieve this state or change the state by creating, modifying, or deleting variables within that state.
While CLI commands are a great way to modify states for humans, as they are easy to read and, therefore, easy to remember and type, ...
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