Cisco Cisco IOS Software Release 12.2(27)SBC
RADIUS Server Load Balancing
How to Configure RADIUS Server Load Balancing
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Cisco IOS Security Configuration Guide
When using the RADIUS automated tester, verify that the test packets being sent by the network access
server (NAS) to the AAA servers are being responded to. If the servers are not configured correctly, the
packets may be dropped and the server erroneously marked dead.
server (NAS) to the AAA servers are being responded to. If the servers are not configured correctly, the
packets may be dropped and the server erroneously marked dead.
Caution
It is recommended that a test user, one that is not defined on the RADIUS server, be used for RADIUS
server automated testing to protect against security issues that may arise if the test user is not correctly
configured.
server automated testing to protect against security issues that may arise if the test user is not correctly
configured.
Note
If you want to check load balancing transactions at a specific point in time, you can use the
test aaa group command.
test aaa group command.
How to Configure RADIUS Server Load Balancing
This section contains the following procedures that allow you to configure load balancing:
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Enabling Load Balancing for Named RADIUS Server Group
Use the following task to enable RADIUS server load balancing for a named server group.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
radius-server host {hostname | ip-address} [test username user-name] [auth-port port-number]
[ignore-auth-port] [acct-port port-number] [ignore-acct-port] [idle-time seconds]
[ignore-auth-port] [acct-port port-number] [ignore-acct-port] [idle-time seconds]
4.
aaa group server radius group-name
5.
load-balance method least-outstanding [batch-size number] [ignore-preferred-server]
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
•
Enter your password if prompted.
Step 2
configure
terminal
Example:
Router# configure terminal
Enters global configuration mode.