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NOTE: When you are

setting up privilege levels

on a RADIUS or

TACACS+ server, level 0

allows Normal Exec

access to the switch, and

level 15 allows Privileged

Exec access.

Addendum to the 32 48 and 5 224 User 's Guides

------- -------- ------- -------------- --------------

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admin

started

Console#

Authentication Settings

Similar to RADIUS, TACACS+ is a system that uses a central server to

control authentication for access to switches on the network. The RADIUS

Settings page was renamed "Authentication Settings" and updated to

include TACACS+.

The RADIUS system uses User Datagram Protocol (UDP) while TACACS+

uses Transmission Control Protocol (TCP). UDP only offers best-effort

delivery, while TCP offers a connection-oriented transport. Also, note that

RADIUS encrypts only the password in the access-request packet from the

client to the server, while TACACS+ encrypts the entire body of the packet.

Both RADIUS and TACACS+ authentication control management access

using the console port, Web browser, or Telnet. These access options must

be configured on the authentication server together with user names,

passwords, and specific privilege levels for each user name/password pair.

NOTICE: If you are using only a RADIUS server for authentication, you must

configure a special user name on the server for the CLI enable command that

allows access to the Privileged Exe level from the Normal Exe level. The user

name to configure on the RADIUS server for this command is $Enable.

The Switch/Security/Authentication Settings page contains the following

fields that can be edited:

•

Authentication Sequence— Select the authentication, or

authentication sequence, required: (Default: Local)

–

Local — The switch authenticates the user.

–

RADIUS — A RADIUS server authenticates the user.

–

TACACS — A TACACS+ server authenticates the user.

–

Local, RADIUS — The switch attempts to authenticate the user

first, and then a RADIUS server attempts to authenticate the user.

1.5

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