Hi Jitendra,
I would suggest
opening up a case with GTAC for this. This can get fairly complicated (especially the redundancy part), so this will ensure that we are able to get this the attention that is needed.
When you open up the case, please
include a tech-support from the wireless controller, and be sure to specify the name of the WLAN that you want to configure this on.
-Brandon
PS: This is still open to the community as well, so if any one else has any input, feel free to chime in.