Monnat is correct. I believe that what you are having is a simple problem, but a common one. During the upgrade, you likely went from a ZD firmware of 9.x to a SmartZone firmware of 3.x. When your AP rebooted, it likely lost the configuration of your controller. Your DHCP server is likely set with subcode 3 which allows the AP to obtain DHCP Option 43 and join the controller. You can do two things here. In your DHCP server, change your subcode option from 03 to 06 and reboot the AP so that it get the updated dhcp lease, this time pointing him to the vSZ.
Option two is for you to ssh to the AP and issue the aforementioned command: set scg ip x.x.x.x where x is replace with the IP of your vSZ.
That should fix your problem. Let us know if this gets your APs online..
Good Luck..
Guy, for an MPLS system to work correctly, you need to ensure that all routers in the network can pass MPLS traffic. You mentioned that you have configured MPLS VPN on PE1, 2, 3 and 4; however did you configure the interfaces connecting these 4 routers to the core router in your topology (P) to pass MPLS traffic on each of the respective interfaces? By this I mean, did you go into the interfaces of this router and configure the "ip mpls" command? The same may need to be done in the Camtel router.
I would start there. You can also do an MPLS ping end to end to ensure that the MPLS tunnel is working as expected.
Case in point, the gateway needs to be able to pass the dhcp request frame to the dhcp server successfully end to end.
This is a bit out of the realms of the controller, but hope it helps.