Convert AP to CAPWAP butt can't join WLC

[Ethan and Mia]

[*09/01/2018 00:16:27.1399] CAPWAP State: Discovery
[*09/01/2018 00:16:27.1499] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*09/01/2018 00:16:27.1499] Discovery Response from 10.122.242.10
[*09/01/2018 00:16:27.1799] Discovery response from MWAR 'WLC'running version 8.4.100.0 is rejected.
[*09/01/2018 00:16:27.1799] Failed to decode discovery response(status = 4).
[*09/01/2018 00:16:27.1799] CAPWAP SM handler: Failed to process message type 2 state 2.
[*09/01/2018 00:16:27.1799] Failed to handle capwap control message from controller - status 4
[*09/01/2018 00:16:27.1799] Failed to process unencrypted capwap packet 0x1235000 from 10.122.242.10
[*09/01/2018 00:16:27.1799] Failed to send message to CAPWAP state machine, msgId 0
[*09/01/2018 00:16:27.1799] Failed to send capwap message 0 to the state machine. Packet already freed.
[*09/01/2018 00:16:27.1799] IPv4 wtpProcessPacketFromSocket returned 4

I convert Ap to CAPWAP mode then AP reboot butt can;t join WLC

WLC ip is : 10.122.242.10

[Leo Laohoo · Accepted solution]

Post the complete output to the following commands:
1. WLC: sh sysinfo;
2. WLC: sh time; and
3. AP: sh version
Judging from the logs, I'd say the time and date of the WLC is incorrect. Cisco recommends the WLC to be configured with NTP.

[Ethan and Mia]

Hi Leo

Thanks for replay ,

Time still correct

your request as attached file

thank too much 

[Ethan and Mia]

(Cisco Controller) >show time

Time............................................. Wed Dec 26 21:25:32 2018

Timezone delta................................... 0:0
Timezone location................................ (GMT +7:00) Saigon, Hanoi, Bangkok, Jakatar

NTP Servers
NTP Polling Interval......................... 3600

Index NTP Key Index NTP Server Status NTP Msg Auth Status
------- ----------------------------------------------------------------------------------------------
1 0 172.16.0.1 In Progress AUTH DISABLED

WLC can ping to NTP server 

[balaji.bandi]

1 0 172.16.0.1 In Progress AUTH DISABLED   <-- this show not synched.

look at couple of examples to configure.;

https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/113334-ntp-wlc-config-00.html

https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/82471-ntp-wireless-equip.html#setup-wlc

[Ethan and Mia]

I have a question 

Why some APs can join WLC ?

[sudhir.gupta1]

Hi Shat,

Are all the Model is same or different?
Rgds/Sudhir

[Ethan and Mia]

Hi , Many model such as 1810 , 1815 , 1562

[Leo Laohoo]

If some APs can join and others can't, then I'd be looking at the Regulatory Domain of the APs.

[sudhir.gupta1]

Hi Shat,

if the version is 8.4, then this version will not work, as this is not recommended.
try upgrading ios to 8.5 and check

Rgds/Sudhir