COA to multiple NAS

[Mike]

Hi

I've got a scenario where we have multiple NAS devices authenticating 
their clients via a freeradius server.

I want to originate COA requests to the NAS devices from the radius 
server and I have succeeded for one device by making an entry for a 
specific NAS in the home-server section of originate-coa. We add and 
remove NAS devices quite often and don't want to have to reconfigure 
originate-coa and restart freeradius every time. How we can enable 
dynamic addition of NAS to send COA requests OR can we send COA to 
servers without preconfiguring?

Currently using & testing Freeradius 2.2.6  but in the process of 
migrating to 3, latest.