When customers receive a new EX switch and power it on, it requests a login name and password. For first-time JUNOS-EX users this could be confusing as there is no password information included. This article provides the default user ID and password information.
The initial login name and password on EX-series switches:
The device is shipped with no password; simply press the enter key.
Note: For security reasons, create a password for the Root ID.