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Server Request Processing Limit

You can configure RADIUS authentication servers and accounting servers to use different UDP ports on the router. This enables the same IP address to be used for both an authentication server and an accounting server. However, you cannot use the same IP address for multiple authentication servers or for multiple accounting servers.rs.

Note: For information about the number of concurrent RADIUS requests that the router supports for authentication and accounting servers, see JUNOSe Release Notes, Appendix A, System Maximums.

The E-series router listens to a range of UDP source (or local) ports for RADIUS responses. Each UDP source port supports a maximum of 255 RADIUS requests. When the 255 per-port limit is reached, the router opens the next source port. When the max-sessions command limit is reached, the router submits the request to the next configured server.

Table 5 lists the range of UDP ports the router uses for each type of RADIUS request.

Table 5: Local UDP Port Ranges by RADIUS Request Type

RADIUS Request Type	ERX-310, ERX-710, ERX-1410, and E120 Routers	ERX-1440 and E320 Routers
RADIUS authentication	50000–50124	50000–50124
RADIUS accounting	50125–50249	50125–50499
RADIUS preauthentication	50250–50374	50500–50624
RADIUS route-download	50375–50500	50625–50749

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