unicast key exchange timeout in 5.X

Hi all,
I’m getting this error (unicast key exchange timeout) when i trying to associate a windows (W7) client to my RB133 5.11 with an Atheros AR5212.
If I disable the security WPA2 i can connect perfectly fine..
I saw this kind of errors as a common BUG with the version 3.X
I was assuming it got solved…am I right?
Here’s my conf. which intend to be a simple wireless AP…

wireless
name=“wlan2” mtu=1500 mac-address=00:11:F5:4B:BA:4A arp=enabl
interface-type=Atheros AR5212 mode=ap-bridge ssid=“MikroTik”
frequency=2412 band=2ghz-b channel-width=20mhz scan-list=defa
wireless-protocol=802.11 antenna-mode=ant-a wds-mode=disabled
wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enable
default-authentication=yes default-forwarding=yes default-ap-
default-client-tx-limit=0 hide-ssid=no security-profile=profi
compression=no

sec profile
name=“profile1” mode=dynamic-keys authentication-types=wpa2-psk
unicast-ciphers=aes-ccm group-ciphers=aes-ccm wpa-pre-shared-key=“kokoloko”
wpa2-pre-shared-key=“kokoloko” supplicant-identity=“” tls-mode=no-certificates
tls-certificate=none static-algo-0=none static-key-0=“” static-algo-1=none
static-key-1=“” static-algo-2=none static-key-2=“” static-algo-3=none
static-key-3=“” static-transmit-key=key-0 static-sta-private-algo=none
static-sta-private-key=“” radius-mac-authentication=no radius-mac-accounting=no
radius-eap-accounting=no interim-update=0s radius-mac-format=XX:XX:XX:XX:XX:XX
radius-mac-mode=as-username radius-mac-caching=disabled group-key-update=5m
management-protection=disabled management-protection-key=“”

logs:

wireless,info debug: 00:0E:9B:6B:71:B8@wlan2: connected
15:53:35 wireless,info 00:0E:9B:6B:71:B8@wlan2: disconnected, unicast key exchange
timeout

this is happening in an endless loop
can any body help me and tell me what I’m doing wrong here?
any help will be highly appreciated

Try WPA2-TKIP instead of WPA2-AES.

Also, try WPA instead of WPA2.

Some clients are picky, and Mikrotik has a long history of wireless disconnects like this… just search the forum.

Thanks jandafields, I tried both …and same issue, it didn’t resolve my problem
And considering what you say, is it fair assuming MT still have this serious issue, or is just me?

any other test that I can run?

suggestions ?

any help will be appreciated

:slight_smile:

allmost same issue ( “disconnected, group key exchange timeout”) using v5.6 on rb751U-2HnD and notebook connected through TP-Link TL-WN723N adapter!

after several changes in profile settings, like using wpa instead wpa2 and using aes instead tkip nothing changed, same issue!

solved by selecting “legacy” in “Rate selection” filed, on “data rates” tab , in winbox in wlan interface

didn’t find the coresponding configuration command in terminal !

hope it will work for you too!