This section will describe Graph Rules in Cacti.
Graph rules are used by the Cacti automation process after a device has been identified and a template has been applied the next step is graph creation. Graph rules are processed from top to bottom.
The graph rule matches the graph template by looking at the data fields chosen that are available in the data query for example below we are creating graphs for interface traffic the data query has several fields available to match on.
You can see how these rules would take place by clicking the show matching objects link.
For example, filter interface query rows using ifOperStatus to select
operationally up interfaces. Check the actual cached value and use Show
Matching Objects to verify the rule. If both administrative and operational
state must be up, also filter ifAdminStatus; ifOperStatus alone does not
test both states.
A device selection Criteria is also important Cacti needs a way to find which device it needs to match. In the below example we are matching any device that has an interface that is up and is not a Windows server.
You can preview which devices this will apply to by clicking the Show matching devices link.
This output shows us which devices match our devices rules this can help with tweaking rules as needed.
This output shows which interfaces,drives,sensors etc will be graphed based on the graph rules.
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