C9120AXI-S Cannot Join EWC

[sangtx92]

Hi everyone.

I currently have a WLC C9800L running IOS 17.8.1.

I just bought 3 x C9120AXI-S (VID 7) and want them to join this controller.

I know that with VID 7, it will need to upgrade to AP Version 17.9.2 or later but when I upgrade these APs
to that version, the APs still cannot Join WLC 17.8.1

***********Log***************

[*11/28/2024 13:16:35.7290] CAPWAP State: Discovery

[*11/28/2024 13:16:35.7320] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)

[*11/28/2024 13:16:35.7350] Discovery Response from 10.96.157.185

[*11/28/2024 13:16:35.7350] Discovery response from MWAR 'WLC2436.DA7F.26A0' running version 17.8.0.144 is rejected.

[*11/28/2024 13:16:35.7350] Failed to decode discovery response(status = 4).

[*11/28/2024 13:16:35.7350] CAPWAP SM handler: Failed to process message type 2 state 2.

[*11/28/2024 13:16:35.7350] Failed to handle capwap control message from controller - status 4

[*11/28/2024 13:16:35.7350] Failed to process unencrypted capwap packet 0x559399d000 from 10.96.157.185

[*11/28/2024 13:16:35.7350] Failed to send capwap message 0 to the state machine. Packet already freed.

So could you please have another idea for me ?

[MHM Cisco World]

CSCvf71074 <<- check this bug

MHM

[sangtx92]

Hi @MHM Cisco World ,

I already checked the CSCvf71074 but about workaround is none, so how can I find the solution?

Thanks!

[MHM Cisco World]

maybe change the domain ? is domain is ""T""

MHM

[marce1000]

 @sangtx92 wrote : I know that with VID 7, it will need to upgrade to AP Version 17.9.2 or later but when I upgrade these APs
to that version, the APs still cannot Join WLC 17.8.1
                 - That makes no sense  , the AP will sync the software version with the controller again ; so you need
  to upgrade the controller to 17.9.2 or later ; as explained in :
                 https://www.cisco.com/c/en/us/support/docs/field-notices/724/fn72424.html

 M.

[sangtx92]

Dear @marce1000 ,

Since the WLC 9800L (17.8.1) is currently managing 11 AIR-2801I-SK9 APs and is running at version 17.8.0.144, this means I cannot keep the WLC version at 17.8.1 if I want 3 C9120AXI-S to join this controller??

Thanks!

[marce1000]

 @sangtx92 wrote : Since the WLC 9800L (17.8.1) is currently managing 11 AIR-2801I-SK9 APs and is running at version 17.8.0.144, this means I cannot keep the WLC version at 17.8.1 if I want 3 C9120AXI-S to join this controller??

    Not sure what exact AP model you are referring to with AIR-2801I-SK9 , but the 2800 series are supported beyond 17.8.x the older IOS COS AP's such as 2700, 3700 model are supported up and to 17.12.x
                 But the indeed , for those C9120AXI-S with that hardware revision level the upgrade is always mandatory

 M.

[Leo Laohoo]

In other development, please keep the number of wireless client connected to a single 910x, 911x or 912x to <15.  If the wireless client >25, the 910x, 911x or 912x will quickly run out of memory and the affected AP will crash.  

Please refer to CSCvy08682. 

And one final thing:  Cisco will not be fixing this bug.