topic Re: R500 "random" disassociations in Access Points - Indoor and Outdoor

R500 "random" disassociations

john_vestberg — Tue, 22 Mar 2016 21:41:04 GMT

Hi, I have two Ruckus R500 installed with the latest unleashed firmware. I'm experiencing a behavior where one of my laptops with Windows 10 frequently gets disassociated from the AP:s.

The system log during the time of disassociation:

Mar 22 22:21:21 ArnasPrastgard kernel: ath_get_radio_stats:Add counters, tx_errors=3431 rx_errors=1 tx_dropped=0 rx_dropped=0
Mar 22 22:21:04 ArnasPrastgard kernel: ol_rc_update_handler: WARNING: handler called without transmit attempts
Mar 22 22:21:04 ArnasPrastgard kernel: Keydata=0x1d 0xb9 0x35 0x92 0x11 0x89 0xaa 0xad 0x17 0x9c 0x8e 0x78 0x79 0x6c 0xf8 0xc4
Mar 22 22:21:04 ArnasPrastgard kernel: Keyix=0 Keylen=16 Keyflags=0 Cipher=4
Mar 22 22:21:04 ArnasPrastgard kernel: wmi_unified_vdev_install_key_send Setting Key for Macaddress:0x5ff2ae815670
Mar 22 22:21:04 ArnasPrastgard kernel: net80211_tac_cfg_sta_set_param(): set station 70:56:81:ae:f2:5f vlan_id = 1
Mar 22 22:21:04 ArnasPrastgard kernel: ol_ath_mute_dfs;1907: Muting DFS
Mar 22 22:21:02 ArnasPrastgard Eved: STA-DISASSOC-REASON [ieee80211_input(),2024,received IEEE80211_FC0_SUBTYPE_DISASSOC] 70:56:81:ae:f2:5f rx_rssi=34,ack_rssi=0,reason=8,freq=2437,chan=6,rx pkt,byte;tx pkt,byte=(21296,1827092,42248,56107480)
Mar 22 22:20:56 ArnasPrastgard clusterD[859]: clusterd_threadForTacmon:2101 clusterD reply the tacmon message.
Mar 22 22:20:56 ArnasPrastgard ZD-APMgr: IPC_thread rcv ping from TACMON
Mar 22 22:20:52 ArnasPrastgard kernel: ath_get_radio_stats:Add counters, tx_errors=3431 rx_errors=1 tx_dropped=0 rx_dropped=0
Mar 22 22:20:26 ArnasPrastgard clusterD[859]: clusterd_threadForTacmon:2101 clusterD reply the tacmon message.

The frequency and the interval of the disassociations seem almost random to me. In some cases several hours can pass before a disassociation, while sometimes I get disassociated every few minutes.

I'm not seeing this behavior on other clients connected to the same AP:s which could suggest an issue with the actual client machine. However, that specific machine does not show these symptoms at all when connecting to other AP:s.

Has anyone experienced something similar?

/John

Re: R500 "random" disassociations

michael_brado — Tue, 22 Mar 2016 23:59:18 GMT

Hello John,

The message says the AP received a STA disassociation, for reason=8, or Client has Roamed away.

Is this Win10 perhaps equidistant between two APs, that it keeps deciding to bounce between? All roaming

behavior is controlled by the client radio/drivers, who have some algorithm that looks at signal strength,

interference, and other factors. Ruckus Unleashed APs do not have Load Balancing or Band Balancing

enabled by default. Check Admin&Services, Services, Radio Control, where each service has a tab.

Re: R500 "random" disassociations

john_vestberg — Wed, 23 Mar 2016 16:31:25 GMT

Hi Michael,
I had the same problem before I upgraded to unleashed, and to rule out that it would bounce to the second AP, I disabled one of the AP:s. However, the problem was still there, so I doubt it has something to do with bouncing...

Re: R500 "random" disassociations

michael_brado — Wed, 23 Mar 2016 17:01:34 GMT

Hm, then that would lead us to look at the Client. You say only this Win10 device appears to have frequent disconnects?

Does the device have the ability to load latest radio drivers/supplicant from your manufacturer? (ie PC vs Chromebook)

Re: R500 "random" disassociations

john_vestberg — Wed, 23 Mar 2016 22:05:37 GMT

Yes, I'm only seeing this on the Win 10 laptop. Other devices (a mix of Androids, iOS, etc) are not having this issue.

I have upgraded to the latest WiFI driver from Broadcom just to see if that solves it, but no...

Also, I'm using the very same Win 10 machine in my company office where we have Ubiquity APs and there I don't see this issue.