Configuring An Interface As The Source For All Radius; Packets; Displaying Radius Configuration Information - Dell PowerConnect B-RX Configuration Manual

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Configuring RADIUS security

Configuring an interface as the source for all RADIUS

packets

You can designate the lowest-numbered IP address configured an Ethernet port, loopback
interface, or virtual interface as the source IP address for all RADIUS packets from the device.
Identifying a single source IP address for RADIUS packets provides the following benefits:
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The software contains separate CLI commands for specifying the source interface for Telnet,
TACACS and TACACS+, and RADIUS packets. You can configure a source interface for one or more
of these types of packets.
To specify an Ethernet or a loopback or virtual interface as the source for all RADIUS packets from
the device, use the following CLI method. The software uses the lowest-numbered IP address
configured on the port or interface as the source IP address for RADIUS packets originated by the
device.
To specify the lowest-numbered IP address configured on a virtual interface as the device's source
for all RADIUS packets, enter commands such as the following.
BigIron RX(config)# int ve 1
BigIron RX(config-vif-1)# ip address 10.0.0.3/24
BigIron RX(config-vif-1)# exit
BigIron RX(config)# ip radius source-interface ve 1
The commands in this example configure virtual interface 1, assign IP address 10.0.0.3/24 to the
interface, then designate the interface as the source for all RADIUS packets from the device.
Syntax: ip radius source-interface ethernet <portnum> | loopback <num> | ve <num>
The <num> parameter is a loopback interface or virtual interface number. If you specify an
Ethernet port, the <portnum> is the port's number (including the slot number, if you are
configuring a device).

Displaying RADIUS configuration information

The show aaa command displays information about all TACACS and TACACS+ and RADIUS servers
identified on the device.
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If your RADIUS server is configured to accept packets only from specific links or IP addresses,
you can use this feature to simplify configuration of the RADIUS server by configuring the
BigIron RX to always send the RADIUS packets from the same link or source address.
If you specify a loopback interface as the single source for RADIUS packets, RADIUS servers
can receive the packets regardless of the states of individual links. Thus, if a link to the RADIUS
server becomes unavailable but the client or server can be reached through another link, the
client or server still receives the packets, and the packets still have the source IP address of
the loopback interface.
BigIron RX Series Configuration Guide
53-1002253-01