Administrator Guide

EXEC Privilege mode
disable level-number
• level-number: The level-number you wish to set.
If you enter disable without a level-number, your security level is 1.
Resetting a Password
To reset a password on the switch, follow the procedure in Recovering from a Forgotten Password on the switch.
RADIUS
Remote authentication dial-in user service (RADIUS) is a distributed client/server protocol.
This protocol transmits authentication, authorization, and configuration information between a central RADIUS server and a RADIUS client
(the Dell Networking system). The system sends user information to the RADIUS server and requests authentication of the user and
password. The RADIUS server returns one of the following responses:
• Access-Accept — the RADIUS server authenticates the user.
• Access-Reject — the RADIUS server does not authenticate the user.
If an error occurs in the transmission or reception of RADIUS packets, you can view the error by enabling the debug radius command.
Transactions between the RADIUS server and the client are encrypted (the users’ passwords are not sent in plain text). RADIUS uses
UDP as the transport protocol between the RADIUS server host and the client.
For more information about RADIUS, refer to RFC 2865, Remote Authentication Dial-in User Service.
RADIUS Authentication and Authorization
The system supports RADIUS for user authentication (text password) at login and can be specified as one of the login authentication
methods in the aaa authentication login command.
When configuring AAA authorization, you can configure to limit the attributes of services available to a user. When you enable
authorization, the network access server uses configuration information from the user profile to issue the user's session. The user’s access
is limited based on the configuration attributes.
RADIUS exec-authorization stores a user-shell profile and that is applied during user login. You may name the relevant named-lists with
either a unique name or the default name. When you enable authorization by the RADIUS server, the server returns the following
information to the client:
• Idle Time
• ACL Configuration Information
• Auto-Command
• Privilege Levels
After gaining authorization for the first time, you may configure these attributes.
NOTE:
RADIUS authentication/authorization is done for every login. There is no difference between first-time login and
subsequent logins.
Idle Time
Every session line has its own idle-time. If the idle-time value is not changed, the default value of 30 minutes is used.
RADIUS specifies idle-time allow for a user during a session before timeout. When a user logs in, the lower of the two idle-time values
(configured or default) is used. The idle-time value is updated if both of the following happens:
• The administrator changes the idle-time of the line on which the user has logged in.
• The idle-time is lower than the RADIUS-returned idle-time.
ACL Configuration Information
The RADIUS server can specify an ACL. If an ACL is configured on the RADIUS server, and if that ACL is present, the user may be allowed
access based on that ACL.
If the ACL is absent, authorization fails, and a message is logged indicating this.
Security
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