Specifications

SECTION
5-1
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
5
Configuring PPP and Authentication
In this Section
This section describes how to configure the Cisco AS5300 and AS5800 for PPP and local
authentication.
The following sections are provided:

Task 1. Configuring PPP Authentication for Local AAA

Task 2. Configuring IPCP Options

Task 3. Configuring LCP Options
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Task 4. Enabling PPP Autoselect

Task 5. Testing Asynchronous PPP Connections

Task 6. Inspecting Active Call States

Task 7. Confirming the Final Running-Config
In this case study, Maui Onions and THEnet perform these same tasks to configure their network access
servers (NAS). Maui Onions uses a Cisco AS5300; THEnet uses a Cisco AS5800. After local
authentication if verified, Maui Onions expects to use TACACS+ and a remote authentication server.
THEnet expects to use RADIUS.
Task 1. Configuring PPP Authentication for Local AAA
Configure AAA to perform login authentication by using the local username database. The
login
keyword authenticates EXEC terminal shell users. Additionally, configure PPP authentication to use the
local database if the session was not already authenticated by
login
.
Step 1
Create a local login username database in global configuration mode. In this example, admin is used for
the administrator. In this case study, the remote client’s login password is dude.
!
username admin password adminpasshere
username dude password dudepasshere
!
Warning
This step also prevents you from getting locked out of the NAS. If you get locked out, you
must reboot the device and perform password recovery.