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2702E 5 GHz network keeps dropping

I have set up an Aironet 2702E, but my clients keeps losing the connection after a while when using the 5 GHZ network. the 2.4 network works without problems.

The AP has been setup in autonomnus mode.

Any help appreciated.

The CLI gives me this error:

  EU stuck
Nov  6 13:58:31.390: %DOT11-6-GEN_ERROR: Error on Dot11Radio1 -
Encryption Engine STUCK BZ738 --
-Traceback= 11AECB8z 20780A4z 17FEE28z 18068C0z 1807D44z 133DDACz 1324B3Cz
Nov  6 13:58:31.410: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to resetPCI reset port 1
Nov  6 13:58:32.718: soap_pci_reconfig_radio: radio id 1
Nov  6 13:58:32.750: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to down
Nov  6 13:58:38.014: %LINK-6-UPDOWN: Interface Dot11Radio1, changed state to up
Nov  6 13:58:39.014: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to up
Nov  6 13:58:42.618: %DOT11-4-MAXRETRIES: Packet to client f816.54db.xxxx reached max retries, removing the client
Nov  6 13:58:45.718: %DOT11-4-MAXRETRIES: Packet to client f816.54db.xxxx reached max retries, removing the client
Nov  6 13:58:46.750: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station f816.54db.xxxx Reason: Sending station has left the BSS
Nov  6 13:58:46.826: %DOT11-6-ASSOC: Interface Dot11Radio1, Station ap f816.54db.xxxx Associated KEY_MGMT[WPAv2 PSK]

The network card on my PC's are Intel 7260-AC cards with the latest driver.

 

Config:

Current configuration : 2655 bytes
!
! Last configuration change at 14:05:45 UTC Thu Nov 6 2014
! NVRAM config last updated at 12:29:50 UTC Thu Nov 6 2014
! NVRAM config last updated at 12:29:50 UTC Thu Nov 6 2014
version 15.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ap
!
!
logging rate-limit console 9
enable secret 5 xxx
!
no aaa new-model
no ip source-route
no ip cef

 


dot11 ssid SSIDNAME-5G
   band-select
   authentication open
   authentication key-management wpa version 2
   wpa-psk ascii 7 xxxxx
!
dot11 ssid 2.4g
   band-select
   authentication open
   authentication key-management wpa version 2
   infrastructure-ssid optional
   wpa-psk ascii 7 xxxxx
!
username CISCO password 7 xxxxx

!
bridge irb
!
interface Dot11Radio0
 no ip address
 !
 encryption mode ciphers aes-ccm
 !
 ssid 2.4G
 !
 antenna gain 0
 stbc
 station-role root
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 spanning-disabled
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
!
interface Dot11Radio1

 no ip address
 !
 encryption mode ciphers aes-ccm
 !
 ssid SSIDNAME-5G
 !
 antenna gain 0
 peakdetect
 no dfs band block
 stbc
 speed  basic-6.0 basic-9.0 basic-12.0 basic-18.0 basic-24.0 basic-36.0 basic-48.0 basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15. m16. m17. m18. m19. m20. m21. m22. m23. a1ss7 a2ss7 a3ss7
 channel width 80
 channel dfs
 station-role root
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 spanning-disabled
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
 

interface GigabitEthernet0
 no ip address
 duplex auto
 speed 1000
 bridge-group 1
 bridge-group 1 spanning-disabled
 no bridge-group 1 source-learning
!
interface GigabitEthernet1
 no ip address
 shutdown
 duplex auto
 speed auto
 bridge-group 1
 bridge-group 1 spanning-disabled
 no bridge-group 1 source-learning
!
interface BVI1
 mac-address f07f.0692.93f4
 ip address 10.0.0.xxx 255.255.255.0
 ipv6 address dhcp
 ipv6 address autoconfig
 ipv6 enable

 

ip default-gateway 10.0.0.xxx
ip forward-protocol nd
ip http server
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
!
bridge 1 route ip
!
line con 0
line vty 0 4
 login local
 length 0
 transport input all
!
sntp server 10.0.0.xxx
sntp broadcast client
end

 

 

 

 

 

3 REPLIES
VIP Purple

Hi

Hi

May be it is specific to this code, try to use different IOS image (if available) & see. If problem pesist across different IOS codes, then I would reach TAC to see if it is HW related. 

EU stuck
Nov  6 13:58:31.390: %DOT11-6-GEN_ERROR: Error on Dot11Radio1 -
Encryption Engine STUCK BZ738 --
-Traceback= 11AECB8z 20780A4z 17FEE28z 18068C0z 1807D44z 133DDACz 1324B3Cz
Nov  6 13:58:31.410: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to resetPCI reset port 1
Nov  6 13:58:32.718: soap_pci_reconfig_radio: radio id 1

HTH

Rasika

**** Pls rate all useful responses ****

Community Member

We worked with Cisco TAC on a

We worked with Cisco TAC on a case regarding our 2702 on code 7.6.120.  What we needed to do was make sure only WPA2 + AES was enabled on the SSID, and remove the Session Timeout.  We found clients connected on the .11a radio would still retain an IP address and show up from the controller view, but traffic was no longer passing.

If you only have one AP you may want to look to set the channel manually and avoid any of the DFS bands.

VIP Purple

Thanks for the update..

Thanks for the update..

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