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1231AG - RM21A - Wireless A Transceiver not Broadcasting

All,

A Cisco 1231AG AP has been used for quite awhile with, 802.11b/g only for a few years. The RM21A module was purchased and installed. The module is recognized and the radio interface is visible in the config. The goal was to have the same SSID on the 802.11b/g antenna as the 802.11a antenna. I used a wireless tool "Wifi Analyzer" on my phone to verify that it doesn't see the channel.

Below is my current config, with extraneous pieces removed. Any help would be greatly appreciated. Thanks you all in advance.

 

!
!
no aaa new-model
!
dot11 ssid NULL
   authentication open
   authentication key-management wpa optional
   infrastructure-ssid
   wpa-psk ascii 7 ABC123!@#
!
!
bridge irb
!
!
interface Dot11Radio0
 no ip address
 no ip route-cache
 !
 encryption mode ciphers aes-ccm
 !
 ssid NULL
 !
 speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
 station-role root
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 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 NULL
 !
 speed 18.0 basic-24.0 36.0 48.0 54.0
 station-role root
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
 bridge-group 1 spanning-disabled
!
interface FastEthernet0
 no ip address
 no ip route-cache
 duplex auto
 speed auto
 bridge-group 1
 no bridge-group 1 source-learning
 bridge-group 1 spanning-disabled
 hold-queue 160 in
!
interface BVI1
 ip address 192.168.1.253 255.255.255.0
 no ip route-cache
!
ip default-gateway 192.168.1.254
!
bridge 1 route ip
!

6 REPLIES
Gold

Hi,Check the output of "show

Hi,

Check the output of "show ip int brief" to verify if both interfaces are up.

Does your mobile phone has a 802.11a radio to detect 5ghz channel?

Regards

Najaf

 

New Member

Najaf,Thank you for

Najaf,

Thank you for responding. My phone does have an 802.11a receiver. I can see SSIDs from other APs on it.

Below is the output from: show ip int br.

 

show ip int br
Interface                  IP-Address      OK? Method Status                Protocol
BVI1                       192.168.1.253   YES NVRAM  up                    up
Dot11Radio0                unassigned      YES NVRAM  up                    up
Dot11Radio1                unassigned      YES NVRAM  up                    up
FastEthernet0              unassigned      YES NVRAM  up                    up

 

Gold

Ok..Does your wifi analyser

Ok..

Does your wifi analyser display the channels even if the SSID is broadcasted?

Also run a carrier buzy test to confirm some activity is taking place on radio with below command.

dot11 dot11Radio 1 carrier busy

Regards

Najaf

New Member

Najaf,Below is the output of

Najaf,

Below is the output of the command:

 

show dot11 carrier busy

Frequency  Carrier Busy %
---------  --------------
   5180          0
   5200          0
   5220          0
   5240          0
   5260          0
   5280          0
   5300          0
   5320          0
   5745          0
   5765          0
   5785          0
   5805          0
NetTechAP#
Frequency  Carrier Busy %
---------  --------------
   5180          0
   5200          0
   5220          0
   5240          0
   5260          0
   5280          0
   5300          0
   5320          0
   5745          0
   5765          0
   5785          0
   5805          0

Also, the tool looks like if an SSID is broadcasting it will pick it up. In addition, if the SSID is already programmed into the phone it will pick it up. Please see the photo below for what it looks like. From what I see (look at the top for a view of the work 802.11a spectrum) it is clean.

Gold

Hi,You can broadcast the SSID

Hi,

You can broadcast the SSID with below command.

config terminal

dot11 ssid NULL

guest-mode

But looking at carrier busy test your 802.11a radio is not looking healthy. May be it is broken and you need to replace it.

Hope that helps.

Regards

Najaf

Cisco Employee

Might need to broadcast the

Might need to broadcast the ssid.. or upgrade the software on card or the AP and try

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