I have a mac client which is running a windows client parallely. Unfortunately this client experiences regular and frequent disconnections from teh vlan. I did an "auth-tracebuf" and got the results below. What is the meaning of the "station down" and most importantly what can be the cause? Thanks very much in advance.
(Master) #show auth-tracebuf count 50
Warning: user-debug is enabled on one or more specific MAC addresses;
only those MAC addresses appear in the trace buffer.
Auth Trace Buffer
-----------------
Jan 27 18:28:59 wpa2-key1 <- 9c:f3:87:ab:22:bc 24:de:c6:1f:03:41 - 117
Jan 27 18:28:59 wpa2-key2 -> 9c:f3:87:ab:22:bc 24:de:c6:1f:03:41 - 117
Jan 27 18:28:59 wpa2-key3 <- 9c:f3:87:ab:22:bc 24:de:c6:1f:03:41 - 151
Jan 27 18:28:59 wpa2-key4 -> 9c:f3:87:ab:22:bc 24:de:c6:1f:03:41 - 95
Jan 27 18:30:48 station-down * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - -
Jan 27 18:30:59 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:30:59 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:30:59 wpa2-key2 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 119
Jan 27 18:30:59 wpa2-key3 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 151
Jan 27 18:30:59 wpa2-key4 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 95
Jan 27 18:32:58 station-down * f8:e0:79:af:ff:2e 9c:1c:12:c1:9c:21 - -
Jan 27 18:32:58 station-up * f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - - wpa2 psk aes
Jan 27 18:32:58 wpa2-key1 <- f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - 117
Jan 27 18:32:58 wpa2-key2 -> f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - 117
Jan 27 18:32:58 wpa2-key3 <- f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - 151
Jan 27 18:32:58 wpa2-key4 -> f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - 95
Jan 27 18:33:47 station-down * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - -
Jan 27 18:33:57 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:33:57 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:33:57 wpa2-key2 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 119
Jan 27 18:33:57 wpa2-key3 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 151
Jan 27 18:33:57 wpa2-key4 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 95
Jan 27 18:40:56 station-down * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - -
Jan 27 18:40:57 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:40:57 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:40:58 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:40:59 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:41:00 station-down * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - -
Jan 27 18:41:07 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:41:07 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:41:07 wpa2-key2 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 119
Jan 27 18:41:07 wpa2-key3 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 151
Jan 27 18:41:07 wpa2-key4 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 95
Jan 27 18:41:40 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:41:40 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:41:40 wpa2-key2 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 119
Jan 27 18:41:40 wpa2-key3 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 151
Jan 27 18:41:40 wpa2-key4 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 95
Jan 27 18:44:44 station-down * f8:e0:79:af:ff:2e 9c:1c:12:c1:b4:01 - -
Jan 27 18:44:44 station-up * f8:e0:79:af:ff:2e 9c:1c:12:c1:74:21 - - wpa2 psk aes
Jan 27 18:44:44 wpa2-key1 <- f8:e0:79:af:ff:2e 9c:1c:12:c1:74:21 - 117
Jan 27 18:44:44 wpa2-key2 -> f8:e0:79:af:ff:2e 9c:1c:12:c1:74:21 - 117
Jan 27 18:44:44 wpa2-key3 <- f8:e0:79:af:ff:2e 9c:1c:12:c1:74:21 - 151
Jan 27 18:44:44 wpa2-key4 -> f8:e0:79:af:ff:2e 9c:1c:12:c1:74:21 - 95
Jan 27 18:47:19 station-down * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - -
Jan 27 18:47:30 station-up * 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - - wpa2 psk aes
Jan 27 18:47:30 wpa2-key1 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 117
Jan 27 18:47:30 wpa2-key2 -> 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 119
Jan 27 18:47:30 wpa2-key3 <- 4c:80:93:16:40:90 9c:1c:12:c1:76:c1 - 151