I have to agree that there may be an application or technical add-on in https://splunkbase.splunk.com/ that will already have a prebuilt dashboard(s) based on the sourcetype you are currently indexing (Cisco devices, F5, Palo Alto etc.). Additionally, you can build your own custom dashboard that are built upon SPL searches that you have run. So if you know the metrics you would like to measure, you can search for them and save them as a visualization on a dashboard. Much more on this topic can be found by following the link below:
https://docs.splunk.com/Documentation/Splunk/6.5.3/Viz/CreateDashboards
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