I'm having a problem with a RB951 where, randomly, all clients are being disconnected. This is happening maybe 2-4 times per day. Once disconnected all clients remain disconnected until one of the following happens:
- AP is rebooted
- Wireless interface is shutdown/enabled
- All registrations are removed
The symptoms are as follows:
- [1] Randomly, the clients disconnect from the network (in Windows, get a yellow ! on the wireless icon). No other message. Note that it's not just one client - ALL clients are disconnected a the same time
- [2] If you try to reconnect (on any client) often the SSID is not shown, and when it is shown, windows will fail to connect
- [3] The contents of the debug logs varies... sometimes there is nothing (not even any references to failed reconnects, disconnects etc). Other times, we get a few lines about key exchange timeout (unsure if it is related).
- [4] In the registration table, the "last activity" counter for all clients gets higher and higher. TX rate drops and drops to eventually 1.0mbps.
- [5] Clients are eventually kicked automatically by the router with the message "disconnected, extensive data loss". Or, if manually kicked, the expected message "disconnected, request to disconnect from registration table".
- [6] Once all clients are removed from the registration table, everything returns to normal and clients reconnect.
Here's the debug log for one of the events (I have full debugging on). At the time, there were only 3 devices associated.
A client associates...
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09:25:48 wireless,debug wlan1: 8C:70:5A:XX:XX:XX attempts to associate
09:25:48 wireless,debug wlan1: 8C:70:5A:XX:XX:XX not in local ACL, by default accept
09:25:48 wireless,info 8C:70:5A:XX:XX:XX@wlan1: connected
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09:36:17 ntp,debug,packet sending to 91.216.168.42 NTP packet (48 bytes)
09:36:17 ntp,debug,packet VN=4
... snip ...
09:36:17 ntp,debug gradually adjust by 1520c0d
09:51:17 ntp,debug,packet sending to 91.216.168.42 NTP packet (48 bytes)
09:51:17 ntp,debug,packet VN=4
... snip ...
09:51:17 ntp,debug gradually adjust by 14c1b96
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09:51:59 wireless,debug wlan1: 74:E5:0B:XX:XX:XX attempts to associate
09:51:59 wireless,info 74:E5:0B:XX:XX:XX@wlan1: reassociating
09:51:59 wireless,info 74:E5:0B:XX:XX:XX@wlan1: disconnected, ok
09:51:59 wireless,debug wlan1: 74:E5:0B:XX:XX:XX not in local ACL, by default accept
09:51:59 wireless,info 74:E5:0B:XX:XX:XX@wlan1: connected
09:52:04 wireless,info 74:E5:0B:XX:XX:XX@wlan1: disconnected, unicast key exchange timeout
09:52:33 interface,info ether2-master-local link up (speed 100M, full duplex)
09:52:33 route,debug,event Interface change
09:52:33 route,debug,event interface=ether2-master-local
09:52:33 route,debug,event status=UP,RUNNING
... snip ...
09:52:33 route,debug,calc End calculation
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09:52:58 system,info,account user admin logged in via winbox
09:53:01 wireless,info 00:26:C7:XX:XX:XX@wlan1: disconnected, extensive data loss
09:58:07 wireless,info 8C:70:5A:XX:XX:XX@wlan1: disconnected, request to disconnect from registration table
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09:58:10 route,debug,event Interface change
09:58:11 route,debug,event interface=wlan1
09:58:11 route,debug,event status=UP
... snip ...
09:58:11 route,debug,calc End calculation
09:58:15 wireless,debug wlan1: 74:E5:0B:XX:XX:XX attempts to associate
09:58:15 wireless,debug wlan1: 74:E5:0B:XX:XX:XX not in local ACL, by default accept
09:58:15 wireless,info 74:E5:0B:XX:XX:XX@wlan1: connected
09:58:15 route,debug,event Interface change
09:58:15 route,debug,event interface=wlan1
09:58:15 route,debug,event status=UP,RUNNING
... snip ...
09:58:16 route,debug,calc End calculation
09:58:35 wireless,debug wlan1: 00:26:C7:XX:XX:XX attempts to associate
09:58:35 wireless,debug wlan1: 00:26:C7:XX:XX:XX not in local ACL, by default accept
09:58:35 wireless,info 00:26:C7:XX:XX:XX@wlan1: connected
09:59:00 wireless,debug wlan1: 8C:70:5A:XX:XX:XX attempts to associate
09:59:00 wireless,debug wlan1: 8C:70:5A:XX:XX:XX not in local ACL, by default accept
09:59:00 wireless,info 8C:70:5A:XX:XX:XX@wlan1: connected
Here's a typical registration table under normal circumstances:
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[admin@MikroTik] /interface wireless registration-table> pr d s
0 interface=wlan1 mac-address=00:26:C7:XX:XX:XX ap=no wds=no bridge=no rx-rate="72.2Mbps" tx-rate="65.0Mbps" packets=17209,16014 bytes=10017338,3166582
frames=17209,16016 frame-bytes=10051752,3070736 hw-frames=17828,16518 hw-frame-bytes=10762793,3726501 tx-frames-timed-out=0 uptime=53m9s last-activity=0ms
signal-strength=-56dBm@HT20-7 signal-to-noise=56dB signal-strength-ch0=-56dBm signal-strength-ch2=-74dBm
strength-at-rates=-54dBm@1Mbps 7s780ms,-51dBm@5.5Mbps 1m12s220ms,-56dBm@6Mbps 7s300ms,-55dBm@36Mbps 53m8s800ms,-56dBm@48Mbps 53m8s740ms,-56dBm@54Mbps
53m8s840ms,-57dBm@HT20-5 42m59s660ms,-57dBm@HT20-6 28m16s60ms,-56dBm@HT20-7 10ms
tx-ccq=99% p-throughput=56751 last-ip=10.1.0.108 802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm
management-protection=no wmm-enabled=yes
1 interface=wlan1 mac-address=8C:70:5A:XX:XX:XX ap=no wds=no bridge=no rx-rate="72.2Mbps" tx-rate="65.0Mbps" packets=3906,3835 bytes=1939148,1007014
frames=3906,3837 frame-bytes=1946986,984242 hw-frames=4421,6511 hw-frame-bytes=2215850,1202485 tx-frames-timed-out=0 uptime=53m9s last-activity=6s680ms
signal-strength=-60dBm@1Mbps signal-to-noise=52dB signal-strength-ch0=-60dBm signal-strength-ch2=-74dBm
strength-at-rates=-60dBm@1Mbps 49s730ms,-54dBm@5.5Mbps 33m58s690ms,-52dBm@6Mbps 6s680ms,-55dBm@24Mbps 53m8s730ms,-56dBm@36Mbps 53m8s190ms,-56dBm@48Mbps
52m51s170ms,-56dBm@54Mbps 52m54s350ms,-52dBm@HT20-6 12m39s390ms,-54dBm@HT20-7 16s920ms
tx-ccq=89% p-throughput=19016 last-ip=10.1.0.129 802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm
management-protection=no wmm-enabled=yes
2 interface=wlan1 mac-address=74:E5:0B:XX:XX:XX ap=no wds=no bridge=no rx-rate="72.2Mbps" tx-rate="72.2Mbps" packets=16789,13867 bytes=15483225,3684992
frames=16789,13869 frame-bytes=15516901,3602028 hw-frames=17208,14404 hw-frame-bytes=16429933,4174341 tx-frames-timed-out=0 uptime=53m9s last-activity=810ms
signal-strength=-56dBm@HT20-7 signal-to-noise=56dB signal-strength-ch0=-56dBm signal-strength-ch2=-74dBm
strength-at-rates=-51dBm@1Mbps 9s130ms,-55dBm@5.5Mbps 18m32s600ms,-57dBm@6Mbps 4s770ms,-52dBm@24Mbps 53m8s780ms,-53dBm@36Mbps 53m8s700ms,-54dBm@48Mbps
53m8s780ms,-53dBm@54Mbps 53m8s810ms,-52dBm@HT20-4 53m7s780ms,-52dBm@HT20-5 53m3s180ms,-55dBm@HT20-6 9m56s960ms,-56dBm@HT20-7 810ms
tx-ccq=99% p-throughput=61319 last-ip=10.1.0.105 802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm
management-protection=no wmm-enabled=yes
3 interface=wlan1 mac-address=10:40:F3:XX:XX:XX ap=no wds=no bridge=no rx-rate="65.0Mbps" tx-rate="65.0Mbps" packets=8924,9735 bytes=1768399,1538248
frames=8924,9737 frame-bytes=1786771,1480074 hw-frames=9327,10812 hw-frame-bytes=2095464,1895322 tx-frames-timed-out=0 uptime=45m54s last-activity=13s310ms
signal-strength=-57dBm@1Mbps signal-to-noise=55dB signal-strength-ch0=-57dBm signal-strength-ch2=-74dBm
strength-at-rates=-57dBm@1Mbps 45m33s230ms,-60dBm@HT20-4 14m10s190ms,-57dBm@HT20-7 13s310ms tx-ccq=100% p-throughput=56751 last-ip=10.1.0.100
802.1x-port-enabled=yes authentication-type=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm management-protection=no wmm-enabled=yes
Anyone got any ideas?