Troubleshooting Radius Server Load Balancing - Cisco Catalyst 2960 series Configuration Manual

How to Configure RADIUS Server Load Balancing
Command or Action
Step 3
radius-server host {hostname | ip-address} [test username
name] [auth-port number] [ignore-auth-port] [acct-port
number] [ignore-acct-port] [idle-time seconds]
Example:
Device(config)# radius-server host 192.0.2.1 test
username test1 idle-time 1
Step 4 radius-server load-balance method
[batch-size number] [ignore-preferred-server]
Example:
Device(config)# radius-server load-balance method
least-outstanding
Step 5
load-balance method
number] [ignore-preferred-server]
Example:
Device(config-sg)# load-balance method
least-outstanding batch-size 5
Step 6
end
Example:
Device(config-sg)# end

Troubleshooting RADIUS Server Load Balancing

After configuring the RADIUS Server Load Balancing feature, you can monitor the idle timer, dead timer,
and load balancing server selection or verify the server status by using a manual test command.
SUMMARY STEPS
1. Use the debug aaa test command to determine when an idle timer or dead timer has expired, when test
packets are sent, the status of the server, or to verify the server state.
2. Use the debug aaa sg-server selection command to determine the server that is selected for load balancing.
3. Use the test aaa group command to manually verify the RADIUS load-balanced server status.
DETAILED STEPS
Step 1 Use the debug aaa test command to determine when an idle timer or dead timer has expired, when test packets are sent,
the status of the server, or to verify the server state.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
950
least-outstanding
[batch-size
least-outstanding
Purpose
Enables RADIUS automated testing.
Enables the least-outstanding load balancing for the
global RADIUS server group and enters server group
configuration mode.
• The default batch size is 25. The batch size
range is from 1 to 2147483647.
Enables least-outstanding load balancing for a global
named server group.
Exits server group configuration mode and enters
privileged EXEC mode.