C9115AX passive client function is not working

[callawu]

I used to have a WLC controller. Recently, I bought a new C9115AX to replace the old WLC.

The new C9115AX is connected to another brand of Client device. I want to access my pc connected to the client through C9115AX. But cannot succeed. The connected client table only shows the client IP but no pc IP.

I enabled the passive client function and it works on my old WLC controller but not the new C9115AX. Is there anything I need to config on my new C9115AX?

[Mark Elsen]

  - If you are using EWC , check verify the configuration with the CLI command : show  tech   wireless , have the output analyzed by  https://cway.cisco.com/tools/WirelessAnalyzer/  , please note do not use classical show tech-support (short version) , use the command denoted in green for Wireless Analyzer.               Checkout all advisories!

 M.

[Rich R]

I think the notes in this bug https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy21664 will answer your question - not supported.

There's also a hidden bug https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr24428 which you can see in bug search results:

CSCvr24428 9800 WLC - Support for passive clients for Flexconnect LS traffic

Symptom: 9800 WLC - Support for passive clients for Flexconnect LS traffic Conditions: Passive client being used and AP is Flex mode and Locally switching traffic. Workaround: None Further Problem Description:
Severity: 6

Status: Other

Updated: Jul 10, 2021

Cases:6
This seems to be a feature enhancement bug for adding support for passive client (on flex local switching) but the fact that it hasn't been touched for more than a year suggests it's not high in Cisco's priorities.  If you have Cisco support then raise with TAC and/or your account team to register your interest in the feature.  If lots of customers ask for it Cisco are more likely to work on it.

PS:  I just noticed the EWC FAQ has been updated recently... EWC will not be supported on 6E and newer APs so EWC will be end of life when the WiFi 6 APs go end of life.  This means Cisco will also minimise or even stop any new developments on EWC so unlikely this will ever be supported in my opinion.
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9800-series-wireless-controllers/q-and-a-c67-743152.html

[callawu]

It is for 9800 WLC model, not C9115AX EWC. 

Are they the same?

[Mark Elsen]

 - Note that EWC only supports access points in flexconnect mode , in that case https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy21664 , would even be more applicable.

 M.

[Rich R]

Yes they are one and the same:
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9800-series-wireless-controllers/nb-o6-embded-wrls-cont-ds-cte-en.html
"With the 9800 Series wireless controller embedded on the Cisco Catalyst 9100 Access Points" - as far as Cisco is concerned EWC is a 9800 series WLC running on the AP.