Cisco WLC c9800lf and AP c9120i rejected see log from ap.

[jmf1982]

Nothing shows in WLC. How to get the CAPWAP tunnel up and running. Followed youtube video from Cisco to cofigure wlc. Thanks in advanced. They are connected to the same subnet which is 192.168.0.0 255.255.240.0 with gw on 192.168.0.1.

[*03/19/2024 12:45:51.1511] CAPWAP State: Discovery
[*03/19/2024 12:45:51.1521] IP DNS query for CISCO-CAPWAP-CONTROLLER.unet.aalborghus.dk
[*03/19/2024 12:45:51.1541] DNS resolved CISCO-CAPWAP-CONTROLLER.unet.aalborghus.dk
[*03/19/2024 12:45:51.1541] DNS discover IP addr: 192.168.0.65
[*03/19/2024 12:45:51.1671] Discovery Request sent to 192.168.0.65, discovery type DNS(3)
[*03/19/2024 12:45:51.1681] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*03/19/2024 12:45:51.1691] Discovery Response from 192.168.0.65
[*03/19/2024 12:45:51.1691] Discovery response from MWAR 'X1-WLC01' running version 17.3.4.40 is rejected.
[*03/19/2024 12:45:51.1691] Failed to decode discovery response(status = 4).
[*03/19/2024 12:45:51.1691] CAPWAP SM handler: Failed to process message type 2 state 2.
[*03/19/2024 12:45:51.1691] Failed to handle capwap control message from controller - status 4
[*03/19/2024 12:45:51.1691] Failed to process unencrypted capwap packet 0x5595e16000 from 192.168.0.65
[*03/19/2024 12:45:51.1691] Failed to send capwap message 0 to the state machine. Packet already freed.

[klnnnnng]

Hello, 

please read the following document and verify the Software version.

https://www.cisco.com/c/en/us/support/docs/field-notices/724/fn72424.html

Regards,

[jagan.chowdam]

WLC c9800 AP compatibility matrix - https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html#c9800-ctr-ap_support

Cisco IOS XE Amsterdam 17.3.4c

17.3.4.40

15.3(3)JPJ7c

Cisco Catalyst APs: *9130 (I/E), 9124 (I/D), *9120 (I/E), 9120 (P), 9117, 9115, *9105 (I/W) *9130 (I/E): VID 02 or earlier *9120 (I/E): VID 06 or earlier *9105 (I): VID 03 or earlier *9105 (W): VID 01

You need to upgrade the WLC code. Cisco recommends 17.9.4 + SMU_CSCwh87343 + APSP (as needed) OR 17.9.4a + APSP(as needed) for all deployments.

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214749-tac-recommended-ios-xe-builds-for-wirele.html#toc-hId--449860532

Jagan Chowdam

/**Pls rate useful responses**/

[jmf1982]

We have a mix of c9800lf with ap9120i and 5500wlc with ap2700 can a SSID be even deployed between these devices. 

[Jerome BERTHIER]

It depends of WLC models and software version. You need to use an IRCM code on 550x WLC in order to setup a mobility tunnel with 9800 controller.

Can you share exact models and versions running on your setup ?

[jmf1982]

WLC 5508     8.5.182.7
                       7.6.101.1

WLC C9800LF

Cisco IOS XE-software, version 17.03.04c
Cisco IOS-software [Amsterdam], C9800-software (C9800_IOSXE-K9), version 17.3.4c, UDGIVELSESSOFTWARE (fc2)

[Jerome BERTHIER · Accepted solution]

Here an overview of mobility concept between platforms and release : https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/b_c9800_wireless_controller-aireos_ircm_dg.html#id_85243

Between IRCM code 8.5.182.7 and IOS-XE 17.03.04c, you may be able to build mobility. Between 8.5.182.7 and 7.6.101.1, I'm really not sure.

In anyway, these releases are not the suggested one. You may upgrade to 8.5.182.108 :https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html#toc-hId--68356249

You'll loose support of old "New Mobility" ("Converged Acess") but as you don't mention 3850 controlers , it should not be an issue.

About 9800, as suggested by others, you may also upgrade to 17.9.4a (suggested TAC release or even 17.9.5). Check compatbility with others services here : https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html#cisco-catalyst-9800-series-wireless-controller-matrix

and upgrade path (intermediate release needed depending of AP models) : https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/release-notes/rn-17-9-9800.html#Cisco_Concept.dita_59a2987f-2633-4630-8c7b-a8e8aecdeaf7

Reading the whole release notes is really mandatory.