topic Issues With Cisco EWC version 17.15.2 in Wireless

Issues With Cisco EWC version 17.15.2

connor-smith — Mon, 09 Dec 2024 14:32:47 GMT

Good day,

I have been running into several issues after upgrading the software on my catalyst 9120 AP that came with ewc version 17.6.4.

I upgraded the version via the http option on the GUI, and after I did, I could not reach the management interface anymore or ping the gig0 interface.

I proceeded to do a day 0 reset but now cannot get to the management interface of the controller. I also noticed that air provision ssid is not showing up which is how i initially configured the ewc when I first set it up with the original software version.

I have tried ignoring the initial config script and configuring it manually as well as using the initial config script but I still cannot seem to get to the management interface. I also cannot see the wlan I set up with the initial configuration script after it is done building the configuration

Does anyone know what is going on.

Thank you

Re: Issues With Cisco EWC version 17.15.2

Mark Elsen — Mon, 09 Dec 2024 14:45:51 GMT

- Do you still have console access and set the baud rate to 115200 bps
ref : https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/technical-reference/c9800-best-practices.html#apconsolebaudrate

Re: Issues With Cisco EWC version 17.15.2

connor-smith — Mon, 09 Dec 2024 14:49:52 GMT

Yes I have console access through putty after setting the baud rate to 115200, but no configuration that I try will get me into the management web GUI after setting the ip and netmask through the console.

Re: Issues With Cisco EWC version 17.15.2

Mark Elsen — Mon, 09 Dec 2024 14:56:05 GMT

- What happens then ? Do you have a screenshot of the problem situation (e.g.) ?

Re: Issues With Cisco EWC version 17.15.2

Rich R — Thu, 12 Dec 2024 16:15:57 GMT

If it's in an unrecoverable state (and I have seen this happen a few times with EWC upgrades) then use https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9120axi-access-point/217537-repairing-c9120-c9115-access-points-from.html to completely re-flash the AP to 8.10.130.0 CAPWAP image then upgrade to 8.10.196.0 CAPWAP image 15.3(3)JK11 then upgrade to 17.6.8 CAPWAP image 15.3(3)JPK9 then convert to the 17.15.2 EWC.
It's a pain going through all the steps but seems to be more reliable.

Re: Issues With Cisco EWC version 17.15.2

connor-smith — Thu, 12 Dec 2024 16:36:30 GMT

Hey!

Thank you very much for the reply

I was able to factory reset the ewc to day 0, however no configuration that I do lets me get into the management UI. I t is also exhibiting strange behavior in that it does not broadcast a wireless network with the last portion of the MAC address when it boots to the day 0 cli, which is how i initially set up the ewc in the first place.

I will give that method I try. I opened a support ticket with cisco, but all the suggestions so far dont seem to be working and im getting annoyed lol.

Cheers

Re: Issues With Cisco EWC version 17.15.2

Gra Hrdwa — Sun, 07 Dec 2025 12:49:23 GMT

Were you able to figure out how to get the SSID to broadcast? We have 5 sites to deploy, but am at a loss. All AP's are factory reset. In ewc mode. CLI works. I see 115200 baud is required but works at 9600.

There are 2 methods to get to the webui described: https://www.cisco.com/c/en/us/support/docs/wireless/embedded-wireless-controller-on-catalyst-access-points/215303-embedded-wireless-controller-conversion.html , however steps for Option 1) doesn't seem to turn the SSID on, while Option 2) is not available since no SSID

I see the Get Started Guide explains how to set up with WLC controller, unfortunately it doesn't give instructions if in EWC.

There is also a EWC white paper, but it says "Wait for approximately 5 minutes and observe the access point LED until it turns solid green and the access point starts to broadcast the CiscoAirprovision-<XXXX> SSID."

Unfortunately, there is just no SSID broadcasting. Happening with every AP we power up.

Re: Issues With Cisco EWC version 17.15.2

Rich R — Mon, 08 Dec 2025 00:53:15 GMT

@Gra Hrdwa Feed the output of "show tech wireless" into the Config Analyzer (link below) to look for common config errors and best practice advice.