How to configure WPA2 in IEEE 802.11s mesh network?

Technik
1

I have a small Wi-Fi mesh network based on IEEE 802.11s. I am trying to configure WPA2 security in my network by using wpa_supplicant utility. But my configuration does not work, my nodes do not see each other. I know that IEEE 802.11s mesh network is supposed to be used with SAE security, but is it possible to configure WPA2 in IEEE 802.11s mesh network? If it is so, please suggest me a WPA2 configuration which works.
I use Raspberry PI 3 with Raspbian 10 (Linux 4.19).
My /etc/network/interfaces file looks like that:

auto mesh0
iface mesh0 inet manual
   pre-up iw dev wlan0 interface add mesh0 type mp mesh_id MESH_NETWORK
   wpa-conf /etc/wpa_supplicant/conf/mesh_wpa2.conf
   post-up ifconfig mesh0 mtu 1532

The wpa_supplicant configuration /etc/wpa_supplicant/conf/mesh_wpa2.conf is as follows:

network={
    ssid="MESH_NETWORK"
    key_mgmt=WPA-PSK
    proto=RSN
    psk="12345678"
    frequency=2412
    pairwise=CCMP
    group=CCMP
}
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2

No, with WPA2 you can’t have a mesh since nodes are separated into stations and aps, while in mesh networks all nodes are equal and can form links however they please.

3

Thanks for your reply, are you sure for that? It is possible to configure WPA2 for IBSS, where we also have peer nodes (wpa_supplicant provides mode=1 for this purpose). So, in IEEE 802.11s mesh network we can configure only SAE security and nothing else?