At the moment we have a freeradius 1.1.3 server on CentOS which is functioning fine, but due to circumstances, and the devices we are using as NASes, the ip pools are located on the NAS instead of being centralized on the RADIUS server as we'd like it. We'd now like to make things a bit more robust, including a clustered MySQL backend for AAA, and, if possible, load balanced freeradius servers on the front end. We'd also like to use SQL ip pools. I am only unsure about one thing though. If we have a shared pool available via DB, what prevents the two load balanced radius instances from giving out the same ip address? I've been doing a fair bit of googling, but without a whole lot of luck in this respect. Thanks for any info, Nick Warr.