EWC 9800 | embedded "own" AP does not JOIN (C9120AXE)

[Schmoebel]

I have reflashed a Cisco 9120AXE (I did it before to other APs aswell) with a Cisco EWC-AP Firmware.

Firmware Package: C9800-AP-universalk9.17.09.04a   which includes:
>> EWC-Image:  C9800-AP-iosxe-wlc.bin
>> AP Image: ap1g7  ( C9115, C9120 )
 

The "EWC" Part has the IP 172.17.48.8
The "AP" Part has the IP 172.17.50.32
Note: This is the same Hardware which has "2" firmwares - EWC and AP .
Note2: They are in the same subnet 172.17.48.0/20

If I set the TFTP Server to the EWC (172.17.48.8) itself, the Download for its own / embedded AP fails.
 

conf t

wireless profile image-download default

 description "default image download profile"

 image-download-mode tftp

  tftp-image-path /

  tftp-image-server 172.17.48.8
 do wr

Dec  8 08:36:08.649:
%INSTALL-5-INSTALL_START_INFO: Chassis 1 R0/0: install_engine: Started install add tftp://172.17.48.8//ap1g7

Dec  8 08:36:49.904:
%CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: APA488.7389.5438 Mac: a488.73be.a1c0 Session-IP: 172.17.50.32[5253] 172.17.48.8[5246] Disjoined Image Download Failed
 

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If I change the TFTP Server to my Test-Notebook (172.17.48.217) which holds the needed Images something very strange happens:
The Image for the "embedded" AP starts to download immediatly, as soon as the download finishes the whole AP Reboots with both "sides / parts" (the EWC part and the AP part)
 

conf t

wireless profile image-download default

 description "default image download profile"

 image-download-mode tftp

  tftp-image-path /

  tftp-image-server 172.17.48.217
 

Dec  8 08:52:23.171:
%INSTALL-5-INSTALL_START_INFO: Chassis 1 R0/0: install_engine: Started install add tftp://172.17.48.217//ap1g7

Dec  8 08:52:50.895:
%INSTALL-5-INSTALL_COMPLETED_INFO: Chassis 1 R0/0: install_engine: Completed install add tftp://172.17.48.217//ap1g7

Dec  8 08:54:13.969:
%CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: APA488.7389.5438 Mac: a488.73be.a1c0 Session-IP: 172.17.50.32[5253] 172.17.48.8[5246] Disjoined Image Download Success

And after  successful download  the EWC and the EWC-AP are rebooting but still cannot join the EWC-AP to the Controller.

This than happens in a endless loop.... until I make the tftp server unavailable again...

[Schmoebel]

Cable works for other APs. 

Yeah, i bought it 2020 already ... it was one of the first ones... **bleep**. 
Any idee how I can go into uboot? It does not take any ESC Keys etc.

[Rich R]

RMA Try different baud rates like 115200 as @Schmoebel found works.

[Schmoebel]

My colleague had to do with u-boot devices (not CISCO)  for years and he told me to try boud rate 115200. ...
It worked ... he said, sometimes it happens that the U-Boot  wants 115200 ...

I am currently reflashing it now.

[Rich R]

Aha good to know!

[yesehak-b]

Hey,

I have encountered the same problem; error on my C9115AXI-E access point, which prevented me from connecting to the device using PuTTY. After troubleshooting, I discovered that the issue was related to the console cable's baud rate.

By changing the baud rate in my PuTTY configuration to 115200, I was able to successfully establish a connection with the AP.

Here's a breakdown of the steps I took:

1. Open PuTTY: Launch PuTTY on your computer.
2. Enter the AP's IP Address or Serial Port: In the "Host Name (or IP address)" field, enter the IP address of your AP or the serial port connection.
3. Configure Baud Rate: Go to the "Connection" category and select "Serial." Set the "Baud Rate" to 115200.
4. Connect: Click the "Open" button to establish the connection.

If you're still unable to connect after changing the baud rate, try:

75, 110, 300, 1200, 2400, 4800, 9600 (this is the default), 19200, 38400, 57600 or 115200

I have tried all but the last one 115200 worked for me.

Hope this helps.

Cheers,

[Schmoebel]

I am happy that I told you something you not knew

I got my EWC AP working now ... even with Version 17.13.1 

Thank you for your help