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Issues with Aironet 1142

Hi all-

Here we go....

Have an existing wireless network using 2 1140's.. (access point and repeater)....using WPA for encryption.  This setup has worked well for years now.  No VLANS setup on the access points.  1140's are autonomous.

Just purchased an 1142 to add to the network to give us N capability...set it up in autonomous mode.  Access point works fine....sort of.  I do not wish to associate the 1140's with the 1142.  No VLANS setup on this access point, either

I have both radios enabled on the 1142...both with same SSID, and using WPA2 encryption.  SSID and key is different from the existing 1140 access points that I have.

Here is my issue.  IF the 2.4 radio is enabled, then my iPad will connect, then drop the IP address....over and over.  Same with the desktops and laptops we have.  I never lose my association to the 1142, I just lose the IP address.

IF the 2.4 radio is disabled, then iPad or computers will connect to the 1142 just fine...and keep the IP address (from a DHCP server on the network).

The existing 1140 network is on Channel 6.  I manually set the 1142 to Channel 1

Clientlink is enabled on both radios.  System software is  c1140-k9w7-tar.124-21a.JA1

So....where have I screwed up?  I'm new to the N thing...but I'm trying to understand it all.

And here is my running config (with the 2.4 radio shut off):

!
! Last configuration change at 21:43:37 -0500 Wed Nov 3 2010 by admin
! NVRAM config last updated at 21:43:37 -0500 Wed Nov 3 2010 by admin
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname Cisco_1142_Access_Point
!
enable secret 5 $1$l7hm$Nv8WHj20tAl8bzhF.rF9L1
!
no aaa new-model
clock timezone -0600 -6
clock summer-time -0500 recurring
!
!
dot11 syslog
!
dot11 ssid HatXXXX N
   authentication open
   authentication key-management wpa version 2
   guest-mode
   wpa-psk ascii 7 1316001D19080223382C
!
dot11 network-map
!
!
username Cisco password 7 01300F175804
username admin privilege 15 password 7 104A000A04011D1C0900
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
shutdown
!
encryption mode ciphers aes-ccm
!
ssid HatXXXX N
!
antenna gain 0
beamform ofdm
channel 2412
station-role root
bridge-group 1
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface Dot11Radio1
no ip address
no ip route-cache
!
encryption mode ciphers aes-ccm
!
ssid HatXXXX N
!
antenna gain 0
dfs band 3 block
beamform ofdm
channel dfs
station-role root
bridge-group 1
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface GigabitEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
no keepalive
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface BVI1
ip address 172.16.1.15 255.255.0.0
no ip route-cache
!
ip default-gateway 172.16.1.1
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
!
sntp server 172.16.1.2
sntp broadcast client
end

Thanks to all who reply....

Everyone's tags (4)
2 REPLIES
Cisco Employee

Re: Issues with Aironet 1142

No obvious reply.

I would check the AP console output. You will see if indeed your client is constantly reconnecting or if it is indeed "just losing ip address". If you only trust what the ipad or windows show, they might show you it's the ip you're losing but most likely they're also disconnecting all the time.

Then you can check with a "show dot11 assoc all" a few details. Type it several times in a row and see the evolution of the signal strength (rssi).

If you remove the beamform command, does it work better ? (should not cause this problem but you never know ...)

Nicolas

===

Please rate answers that you find useful

New Member

Re: Issues with Aironet 1142

I'll try your suggestions later today; thank you for replying.

As for beamform....I didn't have it enabled, but saw it suggested in another forum for an issue similar to mine, so I enabled it on the chance it might take care of the issue.  Alas, nothing changed.....

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