I am currently setting up a wireless controller which is to service several SSIDs which are mapped to physically separated LANs.
So far there has been no problem in doing the config.
However I discovered later that for each SSID a separate RADIUS server has to be queried, which are also in physically separated networks and where no routing exists/will exist.
Now my question is, if there is any possibility to somehow tell the WLC to use a different source interface in order to enable the usage of
RADIUS Server 1 on Network A for SSID A and to use
RADIUS Server 2 on Network B for SSID B.
I just stumbled upon what might be the solution in this case.
Under WLAN Edit page for a SSID under Security -> AAA Servers there is a checkbox called
"Radius Server Overwrite interface".
All RADIUS requests are sent out on the dynamic-interface this SSID is mapped to.
I'll test this and will get back with the results.