I have problems with a deploiement. I installed a WLC 4404. There are 57 AP-1131 used too.
So I configured the controller to use LAG Mode. On my 3560 swtich, I tried to configure a Port-Channel, as in the documentation. But it doesn't works. I had to configure like that:
interface GigabitEthernet <interface id>
switchport trunk encapsulation dot1q
switchport trunk native vlan <native vlan id>
switchport mode trunk
channel-group 1 mode on
interface port-channel 1
This configuration doesn't works very well because 7920 phones are sometimes disconnect of the call manager and never find him again. The quality of the voice is bad too.
So I turn the LAG mode OFF and I configured 2 AP-Manager. The 57 AP works, but I always have the bad quality voice and sometimes some 7920 which are looking for the CCM.
I have my WLAN Voice with QoS Platinium , and WPA PSK security.
I activated the CoS tag to 6 with Platinium QoS. All the other parameters are in default.
All my other phones (7961) works perfectly.
Maybe I have to use the CAC?
Please help me,