As an intro, I have read (and tried) pretty much all I could find on setting up a cAP ac as a repeater/extender, including watching lots of videos. Ignoring all the dead ends and issues, the closest I could come to success is by resetting the cAP to have no initial configuration and using the Setup Repeater script to set up both wifi interfaces as extenders (a special SSID for testing clarity). Clients connecting to the extender get a functioning network on the LAN but no internet connection. The client gets a proper IP address and DNS server address but gets no response to DNS requests.
My network consists of a CCR1009 router, an hAP ac connected to it with a cable and configured by Capsman on the router. The cAP is connected via wifi to the hAP. I have a network DNS server on the router via IPv4 and IPv6. Using packet sniffer on all devices, I can see the IPv4 DNS traffic come from the client, through the cAP and hAP to the router. I can see the DNS responses from the router through the hAP but they never get to the cAP and hence never get to the client. The hAP sends them to the cAP but the cAP never receives them. The cAP has a very simple configuration; the wifi interfaces have connections to the hAP interfaces, and the cAP wifi interfaces have virtual APs under them. There are two bridges; one for one wifi interface/virtual AP apair nd the other for the other pair. I am stumped!
The router is running 6.46 beta 28, the hAP is running 6.46 beta 9 and the cAP is running 6.45.3.
I know that a wired cAP is better than an repeater/extender, and I have some of those. This cAP was destined for a friend who wanted a repeater but due to issues there, I brought it back and am trying to get it working in my environment.