Hi,
Retry Count is the maximum number of times that the router retransmits a RADIUS packet to the RADIUS server. In this case, this has been increased from 3 times to 10 times.
Timeout is the interval (in seconds) before the router retransmits a RADIUS packet to the RADIUS server. In this case, this has been increased from 3 seconds to 10 seconds.
..as I said
Basically, the number of subscribers increased. If we do a maintenance window where we swing back and forth the traffic to the router, all the subscribers will hit the router which eventually push all the RADIUS Requests to the RADIUS server in one shot and on which the MySQL backend is choked during that time.
are you doing authentication and accounting via MySQL? did you perform a benchmark of the RADIUS server + MySQL (eg with dumb temp accounts) to check what the loading could be? in my experience, authentication can be done quickly - its usually the accounting that gives the big hit - I would advise FR 2.1.x with buffered accounting to get such packets out of the way of the live authentication service. alan