Hello,
Splunk Enterprise and Universal Forwarders must be version 6.6.x or higher to upgrade to version 7.3. List all apps and addons et prepare you step-by-step upgrading plan.
Below are the steps to upgrade:
First refer:
https://docs.splunk.com/Documentation/Splunk/7.3.1/Installation/AboutupgradingREADTHISFIRST
upgrade Splunk Enterprise to a compatible version. Refer:
https://docs.splunk.com/Documentation/Splunk/7.3.1/Installation/HowtoupgradeSplunk
Prepare carefully your step-by-step doc, Review, upgrade, and deploy add-ons.
Also, read the docs carefully before upgrading. 🙂
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