Which vlan does this ip address at AP should be at?

[Leftz]

Hello, I got a question when i read the Flexconnect group document (link is listed below). Please see the screenshot which is from this document. The interface g1/0/4 with trunk and native vlan are connected to a AP(flexconnect mode). Based on the interface configuration, I think the AP interface might need to be trunk too. If so, there are at least two vlans and one ip address at this AP. The question is the ip address at the AP should be at vlan 109 or 3? Thank you

https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-7/Flex_7500_DG.htm

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[Leftz]

I disagree. dhcp has something do do with local switching or central switching. If it is local switching, client get ip from local area, otherwise, client get ip from wlc dhcp if the wlc has internal dhcp, or somewhere else.  

[Scott Fella]

If you had one dhcp server, would it make a difference?  DHCP depends on which server gets the response first.  if you have ip helpers to both switches for dhcp, then what do you think will happen.  If you decide that SW1 is your primary dhcp and your ip helper is pointing to that switch on SW2, then do you think dhcp will only come from SW2 or also SW1.  You issue is you are using the switch for dhcp, if you had a dhcp server, no matter if the traffic is local or central, dhcp would come from that server.