Migration 1240 APs from a controller to a new controller

Hi guys,.

I want to install a new controller 4404 and I just want to move the access points that are associated with my current controller to the new controller once installed.

The plan is to change the DHCP server once my new WLC is ready and change address IP 43 option of the old controller to the new controller. This seems simple enough for me.

BUT,

I know that flash LWAPP on the AP sometimes gets stuck, and all access points are drilling above the ceiling and would be a nighmare to lower the ceiling and console in each of them.

If at the initial plan of simply by changing the option of server DHCP 41 in the new work of WLC IP address OK, or do a big risk for getting low ceiling tiles and all that jazz?

Please can someone advise me?

Thx a lot indeed.

Ken

Hi Ken,

First of all, if both controllers to run the same code, there is no program flash. Yet, the APs tend to remember the previous controller, that they were connected, so you might see APs taking time Looong to join the new controller, but they are expected to join later in any case.

Some other ways to do it:

-my favorite: Add the new controller to the same group of mobility than the first and let them know each other (add each IP and MAC controller to another). Then define this new controller the PDC on all points of access, restart them.

-Variant: If you use WCS, use a model to push the APs for the new controller.

-If you change the controller, set up a new one with the same IP addresses as the old (and of course to remove the old before you plug in the other).

-You can also put one of the APs in the same subnet as the other and use OTAP for others to join.

Don't forget that option 43 is just one means, among others, for the AP to the discovery of controllers as much as she possibly can before choosing which is best to join. Change option 43 will not remove the info on the former Comptroller of the memory of the AP, then it might be more effective to push toward the new more gently... but the technique 43 option should work even when...

HTH

J

Tags: Cisco Wireless

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