Configuring UDP Ports
The transaction-based RADIUS protocol uses two UDP ports: one for authentication packets and one for accounting packets. The ports must be configured on two sides: RAD-Series RADIUS Server and the RADIUS clients (SDX application and E-series router).
The officially assigned UDP port numbers are:
Early deployments of RADIUS used 1645/UDP for authentication packets and 1646/UDP for accounting packets.
Both RAD-Series RADIUS Server and the E-series router use the official ports by default. If you decide to use different ports for any reasons, you can change the port after you start RAD-Series RADIUS Server. This procedure is described in the next section.