Authentication of users connecting to a LAN via an EX switch can be performed via 802.1X, MAC RADIUS, or captive portal. Users accessing the EX switch for management purposes can be authenticated via RADIUS, TACACS+ and local password. However, authentication via LDAP is not supported.
root@EX4600# set system authentication-order ? Possible completions: [ Open a set of values password Traditional password authentication radius Remote Authentication Dial-In User Service tacplus TACACS+ authentication services
As of Junos 15.1, LDAP Authentication is not supported in EX switches either for authenticated users connecting to a LAN or users accessing the EX for management of the device. For authentication of users accessing a LAN, see Understanding Authentication on EX Series Switches .
For authentication of users managing an EX switch, see User Access and Authentication Feature Guide for Routing Devices .