A WLC 4402-25 running 188.8.131.52. Some LAP1131. Local DHCP Range configured on WLC for APs. Management and two ap-manager interfaces are in the same subnet. No LAG. Everything is working fine - APs gather DHCP from controller, join LWAPP, happy.
Now I have tried to upgrade to 184.108.40.206. Controller upgrade went fine. After reboot the APs connect with their old existing IP to the controller, get the new software successfully and reboot. After reboot the APs try to get DHCP addresses from WLC. But controller log says:
Tue Mar 23 10:22:13 2010: 00:18:ba:75:a3:78 DHCP received op BOOTREQUEST (1) (len 584, port 1, encap 0xec00)
Tue Mar 23 10:22:13 2010: 00:18:ba:75:a3:78 DHCP dropping packet from AP 00:18:ba:75:a3:78 received on port 1, vlan 16455
I can't find vlan 16455 in configuration, configured management vlan number is 71.
I have copied the original 220.127.116.11 config to another WLC in the Lab (4402-12) and used same AP as above. Have to change IP addresses in interface and DHCP configuration. No LAG but one active interface only. Upgrade to 18.104.22.168 went fine including APs getting DHCP after reboot:
Tue Mar 23 14:48:31 2010: 00:18:ba:75:a3:78 DHCP received op BOOTREQUEST (1) (len 584, port 1, encap 0xec00)
Tue Mar 23 14:48:31 2010: 00:18:ba:75:a3:78 DHCP received a REQUEST on 'management' interface from AP -- bouncing to local DHCP server.
Tue Mar 23 14:48:31 2010: 00:18:ba:75:a3:78 DHCP sending to local dhcp server (0.0.0.0:68 -> 10.1xx.x.xxx:1067, len 302)
I have compared both resulting 22.214.171.124 configs, but found differences in MACs, IPs and timestamps only.
Why is this controller dropping the DHCP packets in the life environment after upgrade? What is vlan 16455?
I have repeated the upgrade several times, with and without intermediary steps (4.1.xxx) - no change with the resulting 4.2 software.