Ionic2 start 2 projects

Hello, while starting ionic1 projects, by ionic serve command, I can start many servers, but using ionic2 I can keep alive one project each time. Is it a bug with the CLI?

yes you can!

ionic serve -p 8000

change 8000 to the port you want to use

it didn’t solve the problem. i need to execute 2 ionic2 projects at the same time, on ionic1, using it environment (ionic & cordova version) works, but for ionic2 projects it doesn’t work. For ionic1 projects it even change the port by itself.
Could you try to run 2 ionic2 projects at same time and tell if it is possible for you and how i could fix it in my environment?
Thank you so much for your help.