Static WDS mesh described in posts above is frequently loses connections. On one side router misses beacons and disconnects another peer.
Router 1:
16:10:37 wireless,info 4C:5E:0C:10:AE:5D@wlan2: disconnected, no beacons received
16:10:37 route,ospf,info OSPFv2 neighbor 0.0.0.2: state change from Full to Down
16:10:38 wireless,info wlan2: data from unknown device 4C:5E:0C:10:AE:5D, sent deauth
16:10:38 wireless,info 4C:5E:0C:10:AE:5D@wlan2: connected, is AP, wants WDS
Router2:
16:10:38 wireless,info 4C:5E:0C:10:AF:72@wlan2: disconnected, received deauth: class 2 frame received (6)
16:10:38 wireless,info 4C:5E:0C:10:AF:72@wlan2: connected, is AP, wants WDS
16:10:38 wireless,debug wlan2: failed to set bridge port for wlan2, reason: device already added as mesh port (6)
16:10:41 route,ospf,info OSPFv2 neighbor 0.0.0.1: state change from Full to Init
In most cases connection reestablishes in a few seconds, but sometimes it falls for several hours and requires to reboot some routers.
Signal level is at -65 dBm, noise floor is -109 dBm, CCQ is 70-90% and falls during disconnect.
There are also another routers that are same connected to Router1 and Router2 and continue the wireless chain.
I know about low WDS performance but it is suitable for me. Now the network collapses when it is almost no traffic...