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Configuring an IP address range for the management network
Configure the management network IP address and mask from the System Menu in the CLI. For example:
>> Main# /cfg/sys/access/mgmt/add
Enter Management Network Address: 192.192.192.0
Enter Management Network Mask:
In this example, the management network is set to 192.192.192.0 and management mask is set to
255.255.255.128. This defines the following range of allowed IP addresses:
192.192.192.1 to 192.192.192.127
The following source IP addresses are granted or not granted access to the switch:
A host with a source IP address of 192.192.192.21 falls within the defined range and would be
allowed to access the switch.
A host with a source IP address of 192.192.192.192 falls outside the defined range and is not
granted access. To make this source IP address valid, you would need to shift the host to an IP
address within the valid range specified by the mnet and mmask or modify the mnet to be
192.192.192.128 and the mmask to be 255.255.255.128. This would put the 192.192.192.192
host within the valid range allowed by the mnet and mmask (192.192.192.128-255).
RADIUS authentication and authorization
The switch supports the Remote Authentication Dial-in User Service (RADIUS) method to authenticate and
authorize remote administrators for managing the switch. This method is based on a client/server model.
The Remote Access Server (RAS)—the switch—is a client to the back-end database server. A remote user
(the remote administrator) interacts only with the RAS, not the back-end server and database.
RADIUS authentication consists of the following components:
A protocol with a frame format that utilizes User Datagram Protocol (UDP) over IP, based on Request
For Comments (RFC) 2138 and 2866
A centralized server that stores all the user authorization information
A client, in this case, the switch
The switch, acting as the RADIUS client, communicates to the RADIUS server to authenticate and authorize
a remote administrator using the protocol definitions specified in RFC 2138 and 2866. Transactions
between the client and the RADIUS server are authenticated using a shared key that is not sent over the
network. In addition, the remote administrator passwords are sent encrypted between the RADIUS client
(the switch) and the back-end RADIUS server.
How RADIUS authentication works
RADIUS authentication works as follows:
1.
A remote administrator connects to the switch and provides the user name and password.
2.
Using Authentication/Authorization protocol, the switch sends the request to the authentication
server.
3.
The authentication server checks the request against the user ID database.
4.
Using RADIUS protocol, the authentication server instructs the switch to grant or deny administrative
access.
255.255.255.128
Accessing the switch
21
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