Hi There,
Here are some pointers in setting up the switch:
Includes basics set of configuration examples:
Configuring VLANs & Routed Vlans for EX Series Switches (CLI Procedure)
[EX/QFX] How to provide SSH access to specific IP addresses and restrict SSH access to all other IP addresses:
https://kb.juniper.net/InfoCenter/index?page=content&id=KB24764
[EX] How to limit SSH login for management to a range of IP address:
https://kb.juniper.net/InfoCenter/index?page=content&id=KB19171
What is a Voice VLAN in EX-series switches and how to configure it?
https://kb.juniper.net/InfoCenter/index?page=content&id=KB11062
Configuring VLANS and Trunking on the EX-series Switch
https://kb.juniper.net/InfoCenter/index?page=content&id=KB11013