Configuration Guide Configuring RADIUS
Run the ip radius source-interface command to specify the source interface for transmitting RADIUS packets. The device
uses the first IP address of the specified interface as the source address of RADIUS packets.
3.3.3 RADIUS Timeout Retransmission
Working Principle
After a RADIUS client transmits a packet to a RADIUS server, a timer is started to detect the response of the RADIUS server.
If the RADIUS server does not respond within a certain period of time, the RADIUS client retransmits the packet.
Related Configuration
 Configuring the RADIUS Server Timeout Time
The default timeout time is 5 seconds.
You can run the radius-server timeout command to configure the timeout time. The value ranges from 1 second to 1,000
seconds.
The response time of a RADIUS server is relevant to its performance and the network environment. Set an appropriate
timeout time according to actual conditions.
 Configuring the Retransmission Count
The default retransmission count is 3.
You can run the radius-server retransmit command to configure the retransmission count. The value ranges from 1 to 100.
 Configuring Whether to Retransmit Accounting Update Packets
Accounting update packets are not retransmitted by default.
You can run the radius-server account update retransmit command to configure retransmission of accounting update
packets for authenticated users.
3.3.4 RADIUS Server Accessibility Detection
Working Principle
A RADIUS client actively detects whether a RADIUS server is reachable and maintains the accessibility of each RADIUS
server. A reachable RADIUS server is selected preferentially to improve the handling performance of RADIUS services.
Related Configuration
 Configuring the Criteria for the Device to Judge That a RADIUS Server Is Unreachable
The default criteria configured for judging that a RADIUS server is unreachable meet the two conditions simultaneously: 1.
The device does not receive a correct response packet from the RADIUS security server within 60 seconds. 2. The device
transmits the request packet to the same RADIUS security server for consecutive 10 times.
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