Can you please specify Robot and Pabot version you are planning to use.

First point: If you read the GitHub readme page, in the "Things you should know", it states:

Pabot will split test execution from suite files and not from individual test level.

 https://github.com/mkorpela/pabot/blob/master/README.md

So there is nothing to do on test level, except if you help develop the tool so it becomes possible to launch testcases in parallel.

Second point: Use rebot. You can merge multiple test execution reports by using the command:

rebot --merge output1.xml output2.xml

This will generate only html report. To obtain a merged output.xml file, just add an -o output.xml in the arguments, like this:

rebot -o output.xml --merge output1.xml output2.xml

I find this link helpful for the setup  :http://testnblog.com/running-robot-test-cases-in-parallel-pabot/

since you have asked jenkins selenium grid setup refer below:

 https://www.guru99.com/introduction-to-selenium-grid.html https://www.guru99.com/maven-jenkins-with-selenium-complete-tutorial.html

Hope this helps!!

Can you please specify Robot and Pabot version you are planning to use.

First point: If you read the GitHub readme page, in the "Things you should know", it states:

Pabot will split test execution from suite files and not from individual test level. See more in Pabot ReadMe.

So there is nothing to do on test level, except if you help develop the tool so it becomes possible to launch testcases in parallel.

Second point: Use rebot. You can merge multiple test execution reports by using the command:

rebot --merge output1.xml output2.xml

This will generate only html report. To obtain a merged output.xml file, just add an -o output.xml in the arguments, like this:

rebot -o output.xml --merge output1.xml output2.xml

I find this link helpful for the setup: Parallel Testing With Robot Framework.

since you have asked Jenkins selenium grid setup refer below:  Selenium Grid Tutorial: Hub & Node (with Example).