3Com 4210G Series, Configuration Manual, Page: 542 / 1133

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[Switch-ui-vty0-4] quit
# Configure the RADIUS scheme.
[Switch] radius scheme rad
[Switch-radius-rad] primary authentication 10.1.1.1 1812
[Switch-radius-rad] primary accounting 10.1.1.1 1813
[Switch-radius-rad] key authentication expert
[Switch-radius-rad] key accounting expert
[Switch-radius-rad] user-name-format with-domain
[Switch-radius-rad] quit
# Configure the AAA methods for the domain.
[Switch] domain bbb
[Switch-isp-bbb] authentication login radius-scheme rad
[Switch-isp-bbb] authorization login radius-scheme rad
[Switch-isp-bbb] accounting login radius-scheme rad
[Switch-isp-bbb] quit
When using SSH to log in, a user enters a username in the form userid@bbb for authentication using
domain
bbb
.
3) Verify the configuration
After the above configuration, the SSH user should be able to use the configured account to access
the user interface of the switch. The commands that the user can access depend on the settings for
EXEC users on the iMC server.
Troubleshooting AAA
Troubleshooting RADIUS
Symptom 1:
User authentication/authorization always fails.
Analysis:
1) A communication failure exists between the NAS and the RADIUS server.
2) The username is not in the format of userid@isp-name or no default ISP domain is specified for
the NAS.
3) The user is not configured on the RADIUS server.
4) The password of the user is incorrect.
5) The RADIUS server and the NAS are configured with different shared key.
Solution:
Check that:
6) The NAS and the RADIUS server can ping each other.
7) The username is in the userid@isp-name format and a default ISP domain is specified on the
NAS.
8) The user is configured on the RADIUS server.
9) The correct password is entered.
10) The same shared key is configured on both the RADIUS server and the NAS.
Symptom 2:
RADIUS packets cannot reach the RADIUS server.
Analysis: