Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 268

User Access Control In addition to authenticating an administrator, the CLI also assigns the administrator access to one of two security levels. Privilege level 1 has readonly access. This level allows the administrator to read information but not configure the switch. The access to this level cannot be modified. Level 15 is the special access level assigned to the superuser of the switch. This level has full access to all functions within the switch. If the account is created and maintained locally, each account is given an access level at the time of account creation. If the administrator is authenticated through remote authentication servers, the authentication server is configured to pass the access level to the CLI when the account is authenticated. When RADIUS is used, the Vendor-Specific Option field returns the access level. Two vendor specific options are supported. These are CISCO-AV-Pairs(Shell:priv-lvl=x) and Dell RADIUS VSA (user-group=x). TACACS+ provides the appropriate level of access. The following rules and specifications apply: • The administrator determines whether remote authentication servers or locally defined authentication accounts are used. • If authentication servers are used, the administrator can identify at least two remote servers (the user may choose to configure only one server) and what protocol to use with the server, TACACS+ or RADIUS. One of the servers is primary and the other is the secondary server (the user is not required to specify a secondary server). If the primary server fails to respond in a configurable time period, the CLI automatically attempts to authenticate the user with the secondary server. • The administrator is able to specify what happens when both primary and secondary servers fail to respond. In this case, the user is able to indicate that the CLI should either use the local user accounts or reject all requests. • Even if the administrator configures the CLI to fail login when the remote authentication servers are down, the CLI allows access via the serial interface authenticated by locally managed account data. The default for serial port access is no login or password required. Using the CLI 268