This post tells the needed command to run tomcat7-maven-plugin On Different Port then 8080.
Usually the built project (war) via MVN with tomcat7 plugin used to be run with command
: mvn tomcat7:run , On this it takes default port as 8080
But in a situation where it require to change the port other than 8080 then add the following option : -Dmaven.tomcat.port=8181
So overall command line : mvn tomcat7:run -Dmaven.tomcat.port=8181 ( if running from command line)
This is how its configured on Idea Intellij: