Specifications

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Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide
DOC-7810814=
Chapter 3 Operations
Configuring PPP and Authentication
Testing Asynchronous PPP Connections
Before you troubleshoot PPP negotiation or AAA authentication, you need to understand what a
successful PPP and AAA debug sequence looks like. In this way, you can save time and effort when
comparing a successful debug session against a faulty completed debug sequence.
Successful PPP Negotiation Debug
The following steps describe how to initiate a PPP test call and interpret a successful debug sequence.
Step 1 Enter the appropriate debug commands:
5800-NAS# debug ppp authentication
PPP authentication debugging is on
5800-NAS# debug aaa authentication
AAA Authentication debugging is on
5800-NAS# show debug
General OS:
AAA Authentication debugging is on
PPP:
PPP authentication debugging is on
Step 2 Make sure that your EXEC session receives logging and debug output:
5800-NAS# logging console
Step 3 From the client, send a test call into the NAS by using dialup networking. Figure 3-9 shows an example
Windows dialup networking display.
Figure 3-9 Windows Dialup Networking
Step 4
Go to the NAS terminal screen to observe and interpret the debug output messages. As the call enters
the NAS, debug output is created.
When examining PPP between two remote peers:
a. First check to see if DSR came up.
b. Verify that both sides get through LCP negotiation. If they do, check authentication.
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