Hi. I'm thinking of setting up a guest wifi segment on my little home LAN. I found this how-to: https://openwrt.org/docs/guide-user/network/wifi/guestwifi/guestwifi_dumbap . I wanted to ask here whether that's a good one to follow?
This CLI one is also kind of appealing: https://openwrt.org/docs/guide-user/network/wifi/guestwifi/guest-wlan
Finally, kind of a dummy question: I gotta have 2 separate wifi chips/NICs in order to do this, right?
They are different usecases, first is to be applied on dumbAP, the second to router with wan interface.
To answer the question, you don't need separate wifi chips. I run three different wifi SSIDs mapped to three different VLANs, all available on the 5GHz and the 2.4GHz bands from both my cheap-and-simple Archer C7 routers.
I followed the first guide you linked ( GUI ) to set up a device and it worked very well.
If you want the device to be a router instead of "Dumb AP" , you can still follow the first one (link for GUI dumbap setup), and just simply omit the last part about deleting WAN interfaces. Also, if you are setting up for router mode, omit the part about enabling masquerading on the LAN port. Leave masquerading off for LAN.
You can repeat the step for "guest" interface / zone / wireless setup if you ant to create additional SSIDs for each band.
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