System information

User Authentication.
3-25
• Access Level* – Specifies the user level.
(Options: Normal and Privileged)
• Password – Specifies the user password.
(Range: 0-8 characters plain text, case sensitive)
* CLI only.
Web – Click System, Passwords. Enter the old password, enter the new password,
confirm it by entering it again, then click Apply.
CLI – Assign a user name to access-level 15 (i.e., administrator), then specify the
password.
Configuring Local/Remote Logon Authentication
Use the Authentication Settings menu to restrict management access based on
specified user names and passwords. You can manually configure access rights on
the switch, or you can use a remote access authentication server based on RADIUS
or TACACS+ protocols.
Remote Authentication Dial-in
User Service (RADIUS) and
Terminal Access Controller Access
Control System Plus (TACACS+)
are logon authentication protocols
that use software running on a
central server to control access to
RADIUS-aware or TACACS
-aware devices on the network. An
authentication server contains a
database of multiple user name/
password pairs with associated
privilege levels for each user that requires management access to the switch.
RADIUS uses UDP while TACACS+ uses 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.
Console(config)#username bob access-level 15 4-24
Console(config)#username bob password 0 smith
Console(config)#
Web
Telnet
RADIUS/
TACACS+
server
console
1. Client attempts management access.
2. Switch contacts authentication server.
3. Authentication server challenges client.
4. Client responds with proper password or key.
5. Authentication server approves access.
6. Switch grants management access.