General :: Easy Way To Find Out Like Which Items Don't Match Between 2 Files Regardless Of Order

I have following 2 files

File1
10.1.1.1
10.1.2.1
10.1.3.1

File2
10.1.3.1
10.1.2.1
10.1.1.1

Both are reverse of each other. Now, basically if you see, the contents are same, but in different order. Is there any easy way in which i can find out like which items dont match between 2 files, regardless of order. Lets say i add 10.1.4.1 to File1. Now the result of such comparison should be only '10.1.4.1'. Currently if i am comparing both files using diff, it gives me all the lines.