RT-AC3100 Vlan/Switch port isolation

[sgpapesh]

I am trying to see if I can isolate my wireless network from my physical switch ports.
I am adding a VOIP analog telephone adapter (ATA) to a physical Ethernet port. My goal is to minimize the broadcast traffic to the device. I don't want any traffic eating up cpu cycles on the ATA.

So, I know a vlan would limit broadcast traffic. However, I am unsure if Asus Merlin can do this.
I like the Merlin firmware so I would like to stick with it.
I know DD-WRT can do vlans, but I have yet to use DD-WRT on this router.

Suggestions?

 

[bsdsource]

VLAN's aren't really supported by default but there's seems to be some sort of success with a bit of tinkering. Good luck.

https://www.snbforums.com/threads/vlans-on-merlin-mini-howto.20529/page-2