Problem:  

How to shutdown a Juniper switchport or interface.  This simple JUNOS task frustrates Cisco-minded folks.  So where does JUNOS hide the shutdown command?

Solution:  

"Disable" is the JUNOS command for "shutdown".  Examples:

     Disable:        root@host> set interface ge-0/0/1 disable
     Enable  root@host> del set interface ge-0/0/1 disable

That's it!

CISCO Juniper Routing Switching