Alright, i've checked some logs on VC and failing AP and i found interesting stuff,i thought to check if the certificat are the same, so they are.
172.26.0.160 is my VC so I think the AP know it but can't connect/join it.
By the way could you tell me more on error debug -8949 ?
check it out :
2016-08-12 13:29:01 [primary tunnel] Starting rapper with lifetime p1 = 28000 p2 = 7200
2016-08-12 13:29:01 [primary tunnel] Starting IAP rapper 0 to 172.26.0.160:8423 attmpt 0
2016-08-12 13:29:01 [primary tunnel] lauch rapper command: rapper -c 172.26.0.160 -b 1 -i br0 -x -G 0 -r 8423 -l 28000 -L 7200 -w 1 -o /tmp/rapper.txt
2016-08-12 13:29:01 [primary tunnel] Eth - Populate the PID 27299 in file /tmp/rapper_pid_1
2016-08-12 13:29:01 [primary tunnel] tunnel_retry(266): setting up tunnel to primary tunnel, success.
2016-08-12 13:29:01 [primary tunnel] tunnel_start_up_timer(775): tunnel primary tunnel start up timer
2016-08-12 13:29:01 [primary tunnel] tunnel_stop_up_timer(640): stop up timer.
2016-08-12 13:29:23 [primary tunnel] cli_proc_rapper_msg(849): Receive rapper msg from 59168 port.
2016-08-12 13:29:23 [primary tunnel] Error!!!: Received RC_OPCODE_ERROR lms 172.26.0.160 tunnel 0.0.0.0 RC_ERROR_IKEP2_PKT1 debug-error:-8949
2016-08-12 13:29:23 [primary tunnel] tunnel_err_msg_recv(1572): Error!!! Received RC_OPCODE_ERROR peer public ip 172.26.0.160 tunnel ip 0.0.0.0, controller ip 0.0.0.0, RC_ERROR_IKEP2_PKT1 debug-error:-8949
2016-08-12 13:29:23 tunnel_err_msg_recv 1594: Cause tunnel down by ipsec error, index primary tunnel
2016-08-12 13:29:32 [primary tunnel] tunnel_up_timeout(712): tunnel primary tunnel up timeout.
2016-08-12 13:29:32 [primary tunnel] tunnel_up_timeout(758): primary tunnel tunnel is not up by retry 101387 times, the max retry times on one tunnel is 2. try itself
2016-08-12 13:29:32 [primary tunnel] State TUNNEL_STATE_RETRY Event TUNNEL_EVENT_TUNNEL_RETRY Next state TUNNEL_STATE_RETRY
2016-08-12 13:29:32 [primary tunnel] tunnel_retry(198): tunnel primary tunnel, type ipsec tunnel, peer public address 172.26.0.160
2016-08-12 13:29:32 [primary tunnel] tunnel_retry(211): setting up tunnel to primary tunnel, retry=101388
2016-08-12 13:29:32 [primary tunnel] ipsec_tunnel_connect(1365): connect to primary tunnel, peer address 172.26.0.160.
2016-08-12 13:29:32 [primary tunnel] ipsec_tunnel_connect(1371): stop primary tunnel first before connect to it
2016-08-12 13:29:32 [primary tunnel] stop_rapper: client->pid=27299, tunnel public ip 0.0.0.0, peer tunnel ip 0.0.0.0, tunnel ip 0.0.0.0, port 8423
2016-08-12 13:29:32 [primary tunnel] stop_rapper(1308): Kill client->pid=27299.
2016-08-12 13:29:32 [primary tunnel] stop_rapper(1329): Waiting until the client 27299 is killed
2016-08-12 13:29:32 [primary tunnel] stop_rapper(1341): result of wait4 27299 for pid (client->pid) 27299
2016-08-12 13:29:32 addroute(487):Dst 0 mask 0 gw fe001aac
2016-08-12 13:29:32 [primary tunnel] ipsec_tunnel_connect(1391): primary tunnel, cli_local_ip 172.26.0.186 netmask 255.255.0.0
2016-08-12 13:29:32 addroute(487):Dst a0001aac mask 0 gw fe001aac
2016-08-12 13:29:32 set_route_af: ioctl (SIOCADDRT) failed error no(17)
2016-08-12 13:29:32 [primary tunnel] ipsec_tunnel_connect(1410): add route table destination 172.26.0.160, gw 172.26.0.254, interface br0.
2016-08-12 13:29:32 [primary tunnel] Starting rapper with lifetime p1 = 28000 p2 = 7200
2016-08-12 13:29:32 [primary tunnel] Starting IAP rapper 0 to 172.26.0.160:8423 attmpt 0
2016-08-12 13:29:32 [primary tunnel] lauch rapper command: rapper -c 172.26.0.160 -b 1 -i br0 -x -G 0 -r 8423 -l 28000 -L 7200 -w 1 -o /tmp/rapper.txt
2016-08-12 13:29:32 [primary tunnel] Eth - Populate the PID 27459 in file /tmp/rapper_pid_1
2016-08-12 13:29:32 [primary tunnel] tunnel_retry(266): setting up tunnel to primary tunnel, success.
2016-08-12 13:29:32 [primary tunnel] tunnel_start_up_timer(775): tunnel primary tunnel start up timer
2016-08-12 13:29:32 [primary tunnel] tunnel_stop_up_timer(640): stop up timer.
2016-08-12 13:29:54 [primary tunnel] cli_proc_rapper_msg(849): Receive rapper msg from 59168 port.
2016-08-12 13:29:54 [primary tunnel] Error!!!: Received RC_OPCODE_ERROR lms 172.26.0.160 tunnel 0.0.0.0 RC_ERROR_IKEP2_PKT1 debug-error:-8949