Multiple External Radius Servers Behavior

[cforrest]

HI I am wondering, when you add multiple RADIUS external servers for AAA, what is the default method (or behavior), when for example the first server in the list fails to respond. Also what indicates a failure, is it simply the server being offline (i.e it is dead completely or not returning RADIUS requests).

So for example in scenario 1, if the server goes off line, or in scenario 2 if the server radius service stops responding.

[cforrest]

Also when the primary comes back , I am assuming new connections would connect here without intervention, ie it appears valid again

[cforrest]

Ah thanks , I have hunted around with no specifics timeouts, I have proved it works, so basically it tries a number of times before failing , is this a specific timeout or basically several failures push to the second and so on, and hence when the second responds the connection maybe noticeable ie it takes 4-5 seconds longer to connect, is that a fair assumption.

[samantha_lynn]

The Radius SSID will use the main Radius server until it fails to respond several times in a row. In that case, it would switch to the backup and remain on the backup until forced to switch back to the main Radius server. The Radius server doesn't necessarily need to be down completely for this to trigger the backup Radius server, it just has to fail to respond several times in a row.