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214 CHAPTER 9: AAA AND RADIUS OPERATION
All the supplicants belong to the default domain 3com163.net, which can contain
up to 30 users. RADIUS authentication is performed first. If there is no response
from the RADIUS server, local authentication will be performed. For accounting, if
the RADIUS server fails to account, the user will be disconnected. In addition,
when the user is connected, the domain name does not follow the user name.
Normally, if the user’s traffic is less than 2kbps, consistently, over a period of 20
minutes, they will be disconnected.
A server group, consisting of two RADIUS servers at 10.11.1.1 and 10.11.1.2, is
connected to the switch. The former one acts as the
primary-authentication/second-accounting server. The latter one acts as the
secondary-authentication/primary-accounting server. Set the encryption key as
“name” when the system exchanges packets with the authentication RADIUS
server, and “money” when the system exchanges packets with the accounting
RADIUS server. Configure the system to retransmit packets to the RADIUS server if
no response is received in 5 seconds. Retransmit the packet no more than 5 times
in all. Configure the system to transmit a real-time accounting packet to the
RADIUS server every 15 minutes. The system is instructed to transmit the user
name to the RADIUS server after removing the user domain name.
The user name of the local 802.1x access user is localuser and the password is
localpass (input in plain text). The idle cut function is enabled.
Figure 56 Enabling 802.1x and RADIUS to Perform AAA on the Requester
The following examples concern most of the AAA/RADIUS configuration
commands. The configurations for accessing user workstation and the RADIUS
server are omitted.
1 Enable the 802.1x performance on the specified port Ethernet 1/0/2.
[SW7750]dot1x interface ethernet 1/0/2
2 Set the access control mode. (This command could not be configured, when it is
configured as MAC-based by default.)
[SW7750]dot1x port-method macbased interface ethernet 1/0/2
3 Create the RADIUS group radius1 and enter its configuration mode.
[SW7750]radius scheme radius1
4 Set the IP address of the primary authentication/accounting RADIUS servers.
Internet
Authentication servers
(RADIUS server cluster
IP address: 10.11.1.1,
10.11.1.2)
Requestor
E1/0/2
Switch
Authenticator