After I got everything setup right, four of my LWAPP stations stop working properly. Now, I see the green red amber blinking constantly.
I went to one of the ap and enable debug lwapp for any errors.
Well, out of 60 APs just these fours started doing this.
"could not discover any mwar"
This error keeps coming up and I don't know if they are related to the blinking error lights.
Another troubleshooting step, I notices the WLC reports only 25 access point supported.
Do you think this is related to LWAPP is the issue or something else is going with the APs?
Par, George is right. This is how it works:
1. Your 4402-25 will not take more than 25 APs at a time.
2. When your APs discover the network, they discover the 4402-25, that returns the number of slots it supports (25), and the number of APs it already has.
3. The first 25 APs find that there is still space and join the controller.
4. All the other APs return an error message "cannot find a controller" (they find one, but it is not usable as such, as it has no available slot, so they say that they cannot find (a usable) controller.
5. These "stranded" access points keep rebooting and trying... forever.
6. Whenever one of the 25 first APs reboots / disconnects from the controller for any reason, some of the other access points may find that there is an available slot and join the controller.
7. The rebooting access point suddenly discovers that the slot is taken and returns "cannot find a controller".
There is no solution, except get some more controller slots, by sending the extra APs to another controller...
The story about "no limitation with LAG" is as follows:
- without LAG, a controller cannot take more than 48 APs on a given port, regardless of its model (this might be the part thatw as not clear in the documentation you saw): so if your controller is a 4402-25, the limit if 25 anyway. If your controller is a 4402-50 or a 4404 (100), you might be limited because of this hardware limit.
- With LAG, this hard limit disappears, and the limitation is the controller AP support (still 25 in your case, so no difference, but 50 for a 4402-50 and 100 for a 4404). But using LAG does not by magic allow your controller to support an unlimited number of APs, each controller hardware and port number and speed is built with a max number of APs in mind...
Par, I know the feeling. I have been there myself. You are correct 4402-25 will only ever allow 25 access point, no more than 25 can live on a controller at any given time.
If your access points are bouncing on and off the control then something is wrong. Normally once the 25 join they are solid and they shouldnt bounce. That is an issue...
The access points that join will show up under the wireless tab. These access point will be a light green when know one is on them or a dark blue if they are....
The access points not joined to the controller will flash colors over and over again in an attempt to join a controller...
Here is a good read on the join process