On the R710, probably not if you have everything set up on pfsense, but let's run through a pre-flight list
(1) On the R710 you should have three SSID's, one mapped to each VLAN: 1, 30 and 50
I am on unleashed. I have 3 wireless SSID. One each for my internal LAN, 30 (guests), 50 (IOT)
(2) On the ICX you have port 42 configured as dual-mode for vlan 1, and tagged for vlan 30 and 50
Yes, based on the clear instructions you gave earlier. Thank you
(3) On pfsense you should have at least 4 interfaces, one for your internet and one each for vlan, 1, 30, and 50
Yes, I have this done too.
The r710 is my only AP, and it is connected to port 42 on the 6610.
This could be as few as 2 physical ethernet interfaces if you are using VLAN trunking on your trusted side or more likely 4 physical ethernet interfaces using untagged ports for each VLAN 1, 30, and 50
(4) You have a DHCP scope configured for 3 of the interfaces, VLAN 1, VLAN 30, and VLAN 50 and the.
Yes, I did this in pfsense.
In each scope you defined the IP address range that will be used, the default gateway for each VLAN, the netmask (or size), and probably at least 1 DNS server.
ah... I did not put a specific DNS server for each of the DHCP servers to the 3 vlans. Is this needful because I did not need to do so for the non vlan LAN network
The default gateway has to be in the same subnet in use on that vlan. The DNS server can inside your network somewhere or out on the Internet depending on how you have things set up.
I'm making the assumption that you are also using pfsense to route between the VLAN's though you don't have to do that if you are just using pfsense as the DHCP Server.
How are we doing on 1-4?