Source address configuration for RADIUS packets

You can designate the lowest-numbered IP address configured on Ethernet port, loopback interface, or virtual interface as the source IP address for all RADIUS packets from the Layer 3 Switch.

When a source interface is configured, management applications use the lowest configured IP address of the specified interface as the source IP address in all the outgoing packets. If the configured interface is not part of the management VRF, the response packet does not reach the destination.

The RADIUS source interface configuration command ip radius source-interface should be compatible with the management VRF configuration.

Any change in the management VRF configuration takes effect immediately for the RADIUS client.

The following example configures an Ethernet interface as the source IP address for the RADIUS client.
device(config)# ip radius source-interface ethernet 1/1/1
The following example configures a loopback interface as the source IP address for the RADIUS client.
device(config)# ip radius source-interface loopback 1 

Refer to the RUCKUS FastIron Command Reference for details on the ip radius source-interface command.