@TOSC 

VLAN is VLAN regardless of brand. if you connect the unifi access point to VLAN 30, you should not tag the SSID with VLAN 30, then you will be tagged against untagged and it will not work. so you can do it in two ways. connect the access point to untagged VLAN1 and then tag VLAN 30 on the SSID, or you can connect the access point to VLAN 30 but then you must remove the VLAN 30 tag on the unifi access point.

  @MR.S can you explain little more please? Currently vlan 30 is tagged and if this vlan work i am planning to create more vlan tagged. Currently only vlan1 is untagged. Also i have total 30 access points across different floors all connected in poe switch. 

  @TOSC 

I think it is easier if you explain a little better how you have connected everything together, you say vlan1 is untagged on the switch, is that correct, t

hen you have created a vlan 30 on the switch that is tagged, is that correct?

you also say that when you connect to a PC with a cable and set vlan 30 it works, is that also true?

if you show me a screenshot of the vlan setup on the ER605 and how the vlan setup looks on the switch, it's easier for me to understand what you're having problems with.

At the unifi access points you also have a unifi controller, right? 

if you have vlan 1 untagged and vlan 30 tagged on all ports, it should work if you create a vlan30 on the unifi controller and select this in the ssid setup.

so start with some screenshots of the vlan setup on the ER605

  @TOSC 

if your setup looks like this on the router, it is correct on the router.

  @MR.S 

• I am attaching screenshots
• 

  @MR.S 

Also attaching unifi controller setup 

Check below one also

  @TOSC 

If the Cisco switch is connected to port 2,3 or 4 on the router, then the problem is with the cisco switch, everything else looks correct, Cisco swither can be a bit difficult if you don't have experience with them, so you have to learn cisco :- ) but if you have a screenshot of the switch vlan config, I can look at it and, if not, you have to go on to the cisco forum..

  @TOSC 

I don't think it matters, but when you don't have a unifi router, you create vlan this way. no match network name I se :-) but you understand..

  @MR.S 

Actually connection from router is going to vlan aware unmanaged cisco switch sg94-24t. And only port 4 is using. Connection between router and switch is port 4.port 5 and port 3 are free. No network cable connected to port 5 to switch. Should i connect all ports to switch?

What should i do ?

  @MR.S 

Yeah, same way i did