Lab 2.3.3: Configure an Asynchronous Connection from a workstation to a router with automatic modem configuration using the AUX port

Objective:

  • Make a successful asynchronous connection from a workstation to a router with a modem attached to the AUX port.

Scenario:

Your colleagues also working for the Atlanta Bread Company would like to dialin to your router. You will properly configure an asynchronous connection on your router using the AUX port and dialin from a remote location.

Notes: 

Lab Tasks:

  1. Cable the equipment as shown in the diagram.
  2. Log into the Atlanta Bread Company router and enter global configuration mode.
  3. The commands to configure the aux port for async operation are :

Atlanta(config)#line aux 0
Atlanta(config-line)#password cisco
Atlanta(config-line)#login

  1. Specify the RTS/CTS for flow control and set the line speed with the following commands:

Atlanta(config-line)#flowcontrol hardware
Atlanta(config-line)#speed 115200

  1. Set the modem for both incoming and outgoing calls with the following command:

Atlanta(config-line)#modem inout

  1. Set the stopbits and allow all protocols to be passed to the router through this line with the following commands:

Atlanta(config-line)#stopbits 1
Atlanta(config-line)#transport input all

  1. To configure the modem to answer incoming calls on the AUX port you do not have to reverse telnet. Just simply issue the following command

Atlanta(config-line)#modem autoconfigure discovery

  1. The final step to configure the router is to configure a host to IP mapping. This host to IP mapping must also include the port number for the reverse telnet session. The command to do this is:

Atlanta(config)# ip host auxmodem 2065 172.16.0.1

Note: The AUX port is line 65.

  1. Write the configuration to memory.
  2. From your desktop computer dialin to the Atlanta router's AUX port modem. Once the modems connect you should see a password prompt like the one below:

CONNECT 33600 V42bis

User Access Verification

Password:

  1. Login to the router and issue a few commands. Issue the commands "who" and "show line". Record your findings below:


  2. To disconnect from the router issue the following command:

Atlanta#exit