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New Member

iOS devices losing connectivity on WLC 5508

Hello,

I'm currently having an issue with a few clients with iOS devices (iPad and iPhone) that are losing connectivity periodically throughout the day. Android devices are not impacted. It seems to be only under one AP, but I can't confirm that currently. The users say they can be in any app (even native apps) and they will randomly disconnect (the wifi connection stays connected) but they are not able to load anything. It will eventually reconnect and they can start loading data again. During these events, I see nothing reported on the debug event log.

 

So to clarify, the debug shows nothing but normal DHCP requests, no deauths, or timeouts. User idle and session timeouts are set to 24 hours, so I'm not seeing that being any issue.

 

Here's some debug and WLAN information:

MAC address ................................ 84:8e:0c:a8:b6:6a

Debug Flags Enabled:
  dhcp packet enabled.
  dot11 mobile enabled.
  dot11 state enabled
  dot1x events enabled.
  dot1x states enabled.
  pem events enabled.
  pem state enabled.
  CCKM client debug enabled.

-----------------------------------------------------------------------------------------

 

WLAN Identifier.................................. 19
Profile Name..................................... BYOD
Network Name (SSID).............................. BYOD
Status........................................... Enabled
MAC Filtering.................................... Disabled
Broadcast SSID................................... Enabled
AAA Policy Override.............................. Disabled
Network Admission Control

  Radius-NAC State............................... Disabled
  SNMP-NAC State................................. Disabled
  Quarantine VLAN................................ 0
Maximum number of Associated Clients............. 0
Number of Active Clients......................... 2260
Exclusionlist.................................... Disabled
Session Timeout.................................. 43200 seconds
CHD per WLAN..................................... Disabled
Webauth DHCP exclusion........................... Disabled
Interface........................................ blackhole
Multicast Interface.............................. Not Configured
WLAN ACL......................................... unconfigured
DHCP Server...................................... Default
DHCP Address Assignment Required................. Disabled
Static IP client tunneling....................... Disabled
Quality of Service............................... Silver (best effort)
Scan Defer Priority.............................. 
Scan Defer Time.................................. 100 milliseconds
WMM.............................................. Allowed
WMM UAPSD Compliant Client Support............... Disabled
Media Stream Multicast-direct.................... Disabled
CCX - AironetIe Support.......................... Disabled
CCX - Gratuitous ProbeResponse (GPR)............. Disabled
CCX - Diagnostics Channel Capability............. Disabled
Dot11-Phone Mode (7920).......................... Disabled
Wired Protocol................................... 802.1P (Tag=3)
IPv6 Support..................................... Disabled
Passive Client Feature........................... Disabled
Peer-to-Peer Blocking Action..................... Drop
Radio Policy..................................... 802.11a and 802.11g only
DTIM period for 802.11a radio.................... 2
DTIM period for 802.11b radio.................... 2
Radius Servers
   Authentication................................ Global Servers
   Accounting.................................... Global Servers
   Dynamic Interface............................. Disabled
Local EAP Authentication......................... Disabled
Security

   802.11 Authentication:........................ Open System
   Static WEP Keys............................... Disabled
   802.1X........................................ Disabled
   Wi-Fi Protected Access (WPA/WPA2)............. Disabled
   CKIP ......................................... Disabled
   Web Based Authentication...................... Disabled
   Web-Passthrough............................... Disabled
   Conditional Web Redirect...................... Disabled
   Splash-Page Web Redirect...................... Disabled
   Auto Anchor................................... Enabled
   H-REAP Local Switching........................ Disabled
   H-REAP Local Authentication................... Disabled
   H-REAP Learn IP Address....................... Enabled
   Client MFP.................................... Optional but inactive (WPA2 not configured)
   Tkip MIC Countermeasure Hold-down Timer....... 60
Call Snooping.................................... Disabled
Roamed Call Re-Anchor Policy..................... Disabled
SIP CAC Fail Send-486-Busy Policy................ Enabled
SIP CAC Fail Send Dis-Association Policy......... Disabled
Band Select...................................... Disabled
Load Balancing................................... Disabled

 

-----------------------------------------------------------------------------------------------

show client detail 84:8e:0c:a8:b6:6a
Client MAC Address............................... 84:8e:0c:a8:b6:6a
Client Username ................................. N/A
AP MAC Address................................... 00:1a:30:33:c0:40
AP Name.......................................... APUS-003  
Client State..................................... Associated     
Client NAC OOB State............................. Access
Wireless LAN Id.................................. 19 
BSSID............................................ 00:1a:30:33:c0:4f  
Connected For ................................... 2577 secs
Channel.......................................... 132
IP Address....................................... 10.4.4.2
Association Id................................... 4  
Authentication Algorithm......................... Open System
Reason Code...................................... 1  
Status Code...................................... 0  
Session Timeout.................................. 43200
Client CCX version............................... No CCX support
QoS Level........................................ Silver
802.1P Priority Tag.............................. 3
WMM Support...................................... Enabled
Power Save....................................... ON
Current Rate..................................... 54.0
Supported Rates.................................. 12.0,18.0,24.0,36.0,48.0,
    ............................................. 54.0
Mobility State................................... Export Foreign
Mobility Move Count.............................. 1
Security Policy Completed........................ Yes
Policy Manager State............................. RUN
Policy Manager Rule Created...................... Yes
ACL Name......................................... none
ACL Applied Status............................... Unavailable
Policy Type...................................... N/A
Encryption Cipher................................ None
Management Frame Protection...................... No
EAP Type......................................... Unknown
Interface........................................ byod
VLAN............................................. 1299
Quarantine VLAN.................................. 0
Access VLAN...................................... 1299
Client Capabilities:
      CF Pollable................................ Not implemented
      CF Poll Request............................ Not implemented
      Short Preamble............................. Not implemented
      PBCC....................................... Not implemented
      Channel Agility............................ Not implemented
      Listen Interval............................ 20
      Fast BSS Transition........................ Not implemented
Fast BSS Transition Details:
Client Statistics:
      Number of Bytes Received................... 262380
      Number of Bytes Sent....................... 810021
      Number of Packets Received................. 2100
      Number of Packets Sent..................... 1069
      Number of EAP Id Request Msg Timeouts...... 0
      Number of EAP Request Msg Timeouts......... 0
      Number of EAP Key Msg Timeouts............. 0
      Number of Data Retries..................... 99
      Number of RTS Retries...................... 0
      Number of Duplicate Received Packets....... 76
      Number of Decrypt Failed Packets........... 0
      Number of Mic Failured Packets............. 0
      Number of Mic Missing Packets.............. 0
      Number of Policy Errors.................... 0
      Radio Signal Strength Indicator............ -51 dBm
      Signal to Noise Ratio...................... 40 dB
Nearby AP Statistics:
      APUS-002(slot 0) ................... 
antenna0: 3638109 seconds ago -128 dBm........... antenna1: 12116 seconds ago -98 dBm
      APUS-001(slot 0) ................... 
antenna0: 2214 seconds ago -73 dBm............... antenna1: 2515 seconds ago -128 dBm
      APUS-010(slot 0) ................... 
antenna0: 3638109 seconds ago -128 dBm........... antenna1: 12164 seconds ago -95 dBm
      APUS-006(slot 0) ................... 
antenna0: 2214 seconds ago -75 dBm............... antenna1: 2214 seconds ago -95 dBm
      APUS-006(slot 1) ................... 
antenna0: 2211 seconds ago -76 dBm............... antenna1: 2512 seconds ago -128 dBm
      APUS-007(slot 0) ................... 
antenna0: 2214 seconds ago -75 dBm............... antenna1: 2214 seconds ago -82 dBm
      APUS-007(slot 1) ................... 
antenna0: 2212 seconds ago -72 dBm............... antenna1: 2514 seconds ago -128 dBm
      APUS-003(slot 0) ................... 
antenna0: 2515 seconds ago -128 dBm.............. antenna1: 2214 seconds ago -55 dBm
      APUS-003(slot 1) ................... 
antenna0: 2211 seconds ago -55 dBm............... antenna1: 2577 seconds ago -128 dBm
      APUS-004(slot 0) ................... 
antenna0: 2214 seconds ago -71 dBm............... antenna1: 2214 seconds ago -74 dBm
      APUS-004(slot 1) ................... 
antenna0: 2212 seconds ago -70 dBm............... antenna1: 3275 seconds ago -128 dBm
      APUS-005(slot 0) ................... 
antenna0: 2214 seconds ago -69 dBm............... antenna1: 2214 seconds ago -69 dBm
      APUS-005(slot 1) ................... 
antenna0: 2580 seconds ago -128 dBm.............. antenna1: 2212 seconds ago -70 dBm
      APUS-008(slot 0) ................... 
antenna0: 12116 seconds ago -91 dBm.............. antenna1: 12119 seconds ago -108 dBm

 

Please let me know what other information you may need, I'd be glad to provide it.

 

Thanks,

Matt

5 REPLIES
New Member

Any thoughts on this from

Any thoughts on this from anyone by chance?

New Member

Hi Matt,Could you please

Hi Matt,

Could you please share "Show wlan wlanid" from controller for WLAN in question.

Under Controller > Fast SSID change > Is enabled.

 

 

New Member

Fast SSID is disabled. The

Fast SSID is disabled. The WLAN information is located above.

New Member

Could you please enable the

Could you please enable the Fast SSID change.

Also can you make the mandatory rate as 6Mbps instead of 12Mbps.

 

And whats the version of code you're running on controller ?

Why you have disabled N rates ? any specific reasons.

New Member

Exactly same issue. I have

Exactly same issue. I have fought against it for years. I am running WLC 4404. iOS devices lost connection periodically, without anything unusual. The Wi-Fi remain connected, but no traffic went through. iOS automatically disconnected from the Wi-Fi in a few seconds (because it detected no traffic went through), and it took another few seconds to reconnect. Also, it seems multiple devices connected to the same Wi-Fi lost connections in the same time.

I tried 802.1x and Open authentication methods, no help. I also tried to extend ARP timeout, Idle timeout and session timeout, no help.

Regards, Lingfeng Xiong
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