Hi,
we are having 5000 network devices in almost 50 sites. when all the devices are in default group iam able to access all the devices.now we are created a NDG's site wise and placed devices in the respective NDG's. I am having only one ACS server, but each n every NDG group is asking for AAA server when iam addding the AAA server to the NDG group it is giving something like host already exit.how can i assign single AAA server to all the NDG's.
please send me the configuration steps.