Cisco AS5300 Configuration Guide - Page 33

Chapter 2 Configuring the Cisco AS5300 Network Access Server Task 3-Setting Up Asynchronous PPP Services Step 2 From the dial-up networking software running on the test PC, use the "Connect to" dialog box to enter the telephone number assigned to the Cisco AS5300. In this example, 5551234 is used: Figure 2-5 Dial Up Networking Dialog Box Step 3 Step 4 Press the Connect button to start the dial-in process. Interpret the debug messages that appear on your terminal screen as a result of Step 3. As the modem call comes into the Cisco AS5300 NAS, debug output is created. Note When examining PPP between two remote peers, first check to see if both sides get through LCP negotiation. If they do, move on to check authentication. After authentication is successful, check IPCP negotiation. The following comments apply to the debug output example that follows. Locate the time stamps in the debug output; then, interpret the call behavior. a. See 21:34:56.958. A modem call comes into the access server on TTY line 4. b. See 21:34:59.722 through 21:34:59.734. An incoming PPP frame is recognized, so PPP is sent on TTY line 4. c. See 21:34:59.790. The test PC gets assigned an IP address from the address pool set up on the NAS. The address is 10.1.2.2. d. See 21:35:01.798. Interface async 4 comes up. After PPP is sent, TTY line 4 becomes async interface 4. e. See 21:35:02.718. Incoming config request (I CONFREQ). The remote test PC requests a set of options to be negotiated. The PC asks the Cisco AS5300 to support the callback option. f. See 21:35:02.738. Outgoing config reject (O CONFREJ). The Cisco AS5300 rejects this option because the NAS is not configured to support Microsoft Callback in this case study. Cisco IOS Dial Services Quick Configuration Guide 2-33