Specifications

Contents
vii
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
SECTION

4
Verifying Modem Performance
4-1
In this Section
4-1
Background on Asynchronous Data Communications
4-1
Async DataComm Model
4-2
Logical Packet and Circuit Components of a NAS
4-3
RS-232 in Cisco IOS
4-4
Cisco IOS Line-Side Inspection
4-6
Understanding Modem Modulation Standards
4-8
V.34 Basic Rules
4-8
V.90 Basic Rules
4-9
Task 1. Initiating a Modem Loopback Test Call
4-10
Task 2. Initiating and Inspecting a V.90 Test Call
4-18
What to do Next
4-26
SECTION
5
Configuring PPP and Authentication
5-1
In this Section
5-1
Task 1. Configuring PPP Authentication for Local AAA
5-1
Task 2. Configuring IPCP Options
5-2
Task 3. Configuring LCP Options
5-3
Task 4. Enabling PPP Autoselect
5-4
Task 5. Testing Asynchronous PPP Connections
5-5
5.1 Successful PPP Negotiation Debug
5-5
5.2 Failed PPP Negotiation Debug and Troubleshooting
5-7
5.3 Troubleshooting Flow Diagrams
5-7
Task 6. Inspecting Active Call States
5-10
6.1 Show Caller Statistics
5-10
6.2 Fast Switching and Route Caching Statistics
5-12
Task 7. Confirming the Final Running-Config
5-13
What to do Next
5-13