How to properly use Layer2 Isolation on USG ATP/FlEX

Zyxel_Kevin

Question

How can I effectively use Layer2 Isolation on the USG ATP/FLEX to ensure some clients communicate while others remain isolated?

Answer: 

Layer2 Isolation on the USG ATP/FLEX is designed to allow or block communication between clients on the same subnet. 

If you think it's not working as expected

• Try flushing the ARP cache on the clients to ensure the firewall can handle ARP replies.
• For a more reliable setup, apply Layer2 Isolation on a Layer 2 switch instead of the firewall.