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New Member

Decrypt errors occurred for client

some computers on the network are having wifi problems even connected loses communication with the network 

Log appears in 

Decrypt errors occurred for client 8c: 00: 6d: 0b: 3a: 77 using WPA key on 802.11b / g interface of AP 08: d0: 9f: ec: d7: e0

 

Version controllers 7.6.130.0

Model 2504

 

AP Model AIR-LAP1142N-T-K9

4 REPLIES
VIP Purple

Hi,Normally it happens when

Hi,

Normally it happens when you have enabled both :wpa/wpa2 with tkip/aes.

Can you paste the output of this:

 

sh wlan <wlan id>

 

Regards

Dont forget to rate helpful posts

New Member

  Hello Sandeep, thanks for

 

 

Hello Sandeep, thanks for answering

 


(Cisco Controller) >show wlan 10


WLAN Identifier.................................. 10
Profile Name..................................... INFORMATICA
Network Name (SSID).............................. INFORMATICA
Status........................................... Enabled
MAC Filtering.................................... Disabled
Broadcast SSID................................... Enabled
AAA Policy Override.............................. Disabled
Network Admission Control
Client Profiling Status
    Radius Profiling ............................ Disabled
     DHCP ....................................... Disabled
     HTTP ....................................... Disabled
    Local Profiling ............................. Disabled
     DHCP ....................................... Disabled
     HTTP ....................................... Disabled
  Radius-NAC State............................... Disabled
  SNMP-NAC State................................. Disabled
  Quarantine VLAN................................ 0
Maximum number of Associated Clients............. 0
Maximum number of Clients per AP Radio........... 200

--More-- or (q)uit
Number of Active Clients......................... 10
Exclusionlist Timeout............................ 60 seconds
Session Timeout.................................. 1800 seconds
User Idle Timeout................................ Disabled
Sleep Client..................................... disable
Sleep Client Timeout............................. 12 hours
User Idle Threshold.............................. 0 Bytes
NAS-identifier................................... CONTROLLER_PRINCESA_01
CHD per WLAN..................................... Enabled
Webauth DHCP exclusion........................... Disabled
Interface........................................ management
Multicast Interface.............................. Not Configured
WLAN IPv4 ACL.................................... unconfigured
WLAN IPv6 ACL.................................... unconfigured
WLAN Layer2 ACL.................................. unconfigured
mDNS Status...................................... Enabled
mDNS Profile Name................................ default-mdns-profile
DHCP Server...................................... Default
DHCP Address Assignment Required................. Disabled
Static IP client tunneling....................... Disabled
Quality of Service............................... Gold
Per-SSID Rate Limits............................. Upstream      Downstream
Average Data Rate................................   0             0

--More-- or (q)uit
Average Realtime Data Rate.......................   0             0
Burst Data Rate..................................   0             0
Burst Realtime Data Rate.........................   0             0
Per-Client Rate Limits........................... Upstream      Downstream
Average Data Rate................................   0             0
Average Realtime Data Rate.......................   0             0
Burst Data Rate..................................   0             0
Burst Realtime Data Rate.........................   0             0
Scan Defer Priority.............................. 4,5,6
Scan Defer Time.................................. 100 milliseconds
WMM.............................................. Allowed
WMM UAPSD Compliant Client Support............... Disabled
Media Stream Multicast-direct.................... Disabled
CCX - AironetIe Support.......................... Enabled
CCX - Gratuitous ProbeResponse (GPR)............. Disabled
CCX - Diagnostics Channel Capability............. Disabled
Dot11-Phone Mode (7920).......................... Disabled
Wired Protocol................................... None
Passive Client Feature........................... Disabled
Peer-to-Peer Blocking Action..................... Disabled
Radio Policy..................................... All
DTIM period for 802.11a radio.................... 1
DTIM period for 802.11b radio.................... 1

--More-- or (q)uit
Radius Servers
   Authentication................................ Disabled
   Accounting.................................... Disabled
   Dynamic Interface............................. Disabled
   Dynamic Interface Priority.................... wlan
Local EAP Authentication......................... Disabled
Security

   802.11 Authentication:........................ Open System
   FT Support.................................... Disabled
   Static WEP Keys............................... Disabled
   802.1X........................................ Disabled
   Wi-Fi Protected Access (WPA/WPA2)............. Enabled
      WPA (SSN IE)............................... Disabled
      WPA2 (RSN IE).............................. Enabled
         TKIP Cipher............................. Disabled
         AES Cipher.............................. Enabled
      Auth Key Management
         802.1x.................................. Disabled
         PSK..................................... Enabled
         CCKM.................................... Disabled
         FT-1X(802.11r).......................... Disabled
         FT-PSK(802.11r)......................... Disabled

--More-- or (q)uit
         PMF-1X(802.11w)......................... Disabled
         PMF-PSK(802.11w)........................ Disabled
      FT Reassociation Timeout................... 20
      FT Over-The-DS mode........................ Disabled
      GTK Randomization.......................... Disabled
      SKC Cache Support.......................... Disabled
      CCKM TSF Tolerance......................... 1000
   WAPI.......................................... Disabled
   Wi-Fi Direct policy configured................ Disabled
   EAP-Passthrough............................... Disabled
   CKIP ......................................... Disabled
   Web Based Authentication...................... Disabled
   Web-Passthrough............................... Disabled
   Conditional Web Redirect...................... Disabled
   Splash-Page Web Redirect...................... Disabled
   Auto Anchor................................... Disabled
   FlexConnect Local Switching................... Disabled
   flexconnect Central Dhcp Flag................. Disabled
   flexconnect nat-pat Flag...................... Disabled
   flexconnect Dns Override Flag................. Disabled
   flexconnect PPPoE pass-through................ Disabled
   flexconnect local-switching IP-source-guar.... Disabled
   FlexConnect Vlan based Central Switching ..... Disabled

--More-- or (q)uit
   FlexConnect Local Authentication.............. Disabled
   FlexConnect Learn IP Address.................. Enabled
   Client MFP.................................... Disabled
   PMF........................................... Disabled
   PMF Association Comeback Time................. 1
   PMF SA Query RetryTimeout..................... 200
   Tkip MIC Countermeasure Hold-down Timer....... 60
   Eap-params.................................... Disabled
AVC Visibilty.................................... Enabled
AVC Profile Name................................. avc
Flow Monitor Name................................ flow
Split Tunnel (Printers).......................... Disabled
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
KTS based CAC Policy............................. Disabled
Assisted Roaming Prediction Optimization......... Disabled
802.11k Neighbor List............................ Disabled
802.11k Neighbor List Dual Band.................. Disabled
Band Select...................................... Disabled
Load Balancing................................... Disabled
Multicast Buffer................................. Disabled

--More-- or (q)uit

 Mobility Anchor List
 WLAN ID     IP Address            Status
 -------     ---------------       ------

802.11u........................................ Disabled

MSAP Services.................................. Disabled

Local Policy
----------------
Priority  Policy Name
--------  ---------------


(Cisco Controller) >

VIP Purple

HI,Encyption setting is ok.

HI,

Encyption setting is ok.

 

Now can you try these 2 settings:

1. Modify the DTIM interval. Good performance has been seen with the DTIM setting of 6.

2. Radio Preambles— radio preamble is a section of data at the head of a packet that contains information that the wireless device and client devices need to send and receive packets. Long Preamble increases interoperability between the WLC and the client. Click on the Wireless tab > Navigate to 802.11 b/g/n > Network option, then uncheck Short Preamble.

 

Hope it helps.

 

Regards

Dont forget to rate helpful posts

 

New Member

thanks for this tip, i modify

thanks for this tip, i modify the DTIM interval for good performance

 

Some computers disconnects of the network Wifi, and when i see the log appears this messanger:

 

Decrypt errors occurred for client 8c: 00: 6d: 0b: 3a: 77 using WPA key on 802.11b / g interface of AP 08: d0: 9f: ec: d7: e0

 

 

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