Configuring the Asynchronous Port
This section describes how to configure the Cisco 2500 series access server for use with a modem, and includes information on configuring the line and security commands.
Full configuration of an access server asynchronous port requires the configuration of two entities—the line and the asynchronous interface. The asynchronous interface is created and configured for support of Serial Line Internet Protocol (SLIP) and PPP. (See the section "Asynchronous Protocols" later in this appendix.)
Configuring the Line
The goal of line configuration is to prepare the line to test dial-in access to an EXEC session. In the following example, lines 1 through 8 are configured:
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Step 1 From a privileged EXEC session, enter the command configure terminal and access line configuration mode:
Router# conf terminal
Enter one configuration command per line. End with CNTL-Z.
Router(config)# line 1 8
Router(config-line)#
Step 2 Configure the lines to meet the EIA/TIA-232 requirements:
Router(config-line)# speed 57600
Router(config-line)# flowcontrol hardware
Router(config-line)# modem inout
Router(config-line)#
Setting the speed at 115200 may offer higher throughput depending on modem speed and compression achieved. Troubleshooting should include testing at lower speeds.
The command modem ri-is-cd can be used instead of the command modem inout to enhance security by not allow outgoing connections from the access server to the modem. Enter the command modem inout during setup to allow configuration of the modem from the access server, changing to the command modem ri-is-cd when testing is completed, if desired.
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