WLC 2504 - Ap join fails with "Unknown AP type. Using Controller Version!!!"

Question

Hi,
I haven't encountered this problem before. On my WLC 2504 I've tried now software versions 8.0.100.0, 7.6.130.0 and 7.4.121.0 (as per recommendation from other supportforum-posts), but still get this debug error when I'm trying to join ap models 1142 and 2602:
(Cisco Controller) >debug capwap errors enable 
(Cisco Controller) >*spamApTask5: Jan 02 02:11:46.549: Unknown AP type. Using Controller Version!!!
*spamApTask0: Jan 02 02:11:46.550: 88:43:e1:78:10:08 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrads = 5,joined Aps =0
*spamApTask5: Jan 02 02:11:56.670: f8:66:f2:14:4e:c1 Deleting AP 10.68.254.101 which has not been plumbed
*spamApTask5: Jan 02 02:11:56.673: f8:66:f2:14:4e:c1 DTLS connection was closed
(Cisco Controller) >
Does anyone know what is failing here? Surely the ap's should be "known" in these software versions? 
Best
Bent Eskil

Answer 1

Hi I have the same issue, today i rebooted the controller after that no Access Point is joining the controller.  While debug i can see same logs as given above. I have configured option 43 and 60 as well on cisco switch. Pool commands are:
ip dhcp pool Room-1
 host 192.168.30.113 255.255.255.0
 client-identifier 0188.1dfc.f7cb.30
 default-router 192.168.30.3
 domain-name mina.local
 option 43 hex f108.aca8.1e68
 dns-server 192.168.30.1 4.2.2.2
 option 60 ascii "Cisco AP c3702
I have checked the time and country code all fine but still Access point are not joining. Can you help me out to figure out the issue.
Thanks