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WLC 9800 Some APs not broadcasting SSID

Captain_Price
Level 1
Level 1

Hello All;

We have a new WLC 9800. Transfered APs from old WLC to WLC 9800. 

Some of APs are broadcasting some of them are not broadcasting. 

mahirozturk_0-1720081114272.png

 

One of them seems not broadcasting but when i checked on the field it is actually broadcasting.

Some of them are still not broadcasting.

All configurations are same (Policy, tags vs.)

I tried;

-Reset AP.

-Reset to factory default APs.

-Changed policy and changed back.

 

 

 

 

12 Replies 12

marce1000
VIP
VIP

 

                    Issue the CLI command :
                   wireless config validate

M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

as I know lastly if the AP dont get PoE it will stop broadcast 
so try use direct AC instead of PoE and see if AP start broadcast 

MHM

Hi, We're using 9120 IE and 2802 IE model APs. I don't think there is a PoE issue because I didn't changed switch or port. When i transfer this APs to old WLC (Cisco 5520 Wireless Controller) everything running normal.

 

   - Did you have time already to execute my first reply :
                                      Issue the CLI command :
                   wireless config validate

 M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Hi @marce1000 ;
There is no output after execute this command.

 

      - Ok , also have a checkup the complete WLC 9800 configuration with the CLI
        command show tech wireless and feed the output into Wireless Config Analyzer

  M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

JPavonM
VIP
VIP

As @MHM Cisco World  said this could be due to insufficient power on the AP. Which AP model are you using? Have you checked which PoE capabilities has the switch? Is it the switch LLDP and/or CDP capable? HAve you tested with another patch cord? (maybe a faulty pair in the Ethenret cable may be impacting power budget or negotiation)

jagan.chowdam
Spotlight
Spotlight

What is the AP model and WLC code you are running on?

Are you sure these APs were broadcasting all SSIDs when they were connected to your old WLC?

If they were, it's unlikely to be a PoE issue. However, it’s still good to check and confirm they are receiving proper PoE.

Additionally, verify that the AP radio slots are enabled by issuing the following commands.

show ap dot11 5ghz summary
show ap name <ap-name> config slot <slot_number> | i Radio

 

Jagan Chowdam

/**Pls rate useful responses**/

Hello @jagan.chowdam ;

You can see clearly what i mean below.

All theese APs have same config. But one of them is not broadcasting WLAN 19. When i transfer this AP to old WLC  (Cisco 5520 Wireless Controller) every thing is normal.

WLC: cisco C9800-40-K9

APs:AIR-AP2802I-E-K9

Cisco IOS XE Software, Version 17.09.05

000002#show ap dot11 5ghz summary | i .*(032039|032040|032041|032047)
032039 5c5a.c727.9920 1 Enabled Up 40 *5/8 (11 dBm) (120,116)*# REAP
032041 5c5a.c746.9bc0 1 Enabled Up 40 *5/8 (11 dBm) (112,108)* REAP
032040 5c5a.c755.01a0 1 Enabled Up 40 *6/7 (3 dBm) (36,40)* REAP
032047 ccdb.9367.c240 1 Enabled Up 40 *1/8 (23 dBm) (128,124)*# REAP

 


000002#sh ap name 032039 wlan dot11 5ghz
Slot id : 1
WLAN ID BSSID
-------------------------
19 5c5a.c727.992f


000002#sh ap name 032041 wlan dot11 5ghz
Slot id : 1
WLAN ID BSSID
-------------------------
19 5c5a.c746.9bcf


000002#sh ap name 032040 wlan dot11 5ghz
Slot id : 1
WLAN ID BSSID
-------------------------
19 5c5a.c755.01af


000002#sh ap name 032047 wlan dot11 5ghz
Slot id : 1
WLAN ID BSSID
-------------------------

 

 


000002#show ap name 032047 config slot 0 | i Radio
Radio Type : 802.11n - 2.4/5 GHz
Radio Mode : REAP
Radio Role : Client Serving
Radio Role Op : Auto
Radio SubType : Tx-Rx
Radio Extended Configurations
000002#show ap name 032047 config slot 1 | i Radio
Radio Type : 802.11ac
Radio Subband : All
Radio Mode : REAP
Radio Role : Client Serving
Radio Role Op : Auto
Radio SubType : Main
Radio Extended Configurations

jagan.chowdam
Spotlight
Spotlight

Make sure proper TAGs applied to this AP "032047". 

Run "Show ap tag summary" and look for this AP.

If TAGs are same, then I would factory reset the AP and verify.

Jagan Chowdam

/**Pls rate useful responses**/

Also

 

Captain_Price
Level 1
Level 1

Hello All; 

Still i see blank when i type "sh ap name 032047 wlan dot11 5ghz".

After this i typed "show wireless client summary | i 032047" i saw there are connected clients to this AP on WLAN 19

MAC Address    AP Name Type     ID State Protocol  Method Role
------------------------------------------------------
38b4.xxxx.xxxx 032047    WLAN 19 Run    11ac      None Local
38b4.xxxx.xxxx 032047    WLAN 19 Run    11ac      None Local

 

After all tihs, i guess there is a problem with IOS. It says the AP is not broadcasting WLAN 19.

But there are two client associated  with "032047" on WLAN 19.

 

 

 - Please continue with this task :=> have a checkup the complete WLC 9800 configuration with the CLI
        command show tech wireless and feed the output into Wireless Config Analyzer

 M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
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