Adding devices to the Cacti tree
The Cacti tree lists sub-trees, hosts, and graphs in a tree-like interface. It is the main user interface for the Graphs tab. There can be more than one tree which allows for a granular definition of the tree structure.
Note
Before creating the Cacti tree, think about a good structure for it. Changing the tree later is going to involve quite some manual work, so it is better to have this set up correctly beforehand, so it is better to have this set up correctly beforehand.
Creating a tree
Cacti already has a default tree defined which holds the localhost. You are going to leave this default tree empty and create your very own tree.