User guide

Internetworking Primer A-41

Modems

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:

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.

Security Commands

Security allows you to control access to the access server and its services. Each line should

be conﬁgured with security. The following are some of the available security commands for

protection of the EXEC sessions:

Global commands

The command username name password password is used for local login (using the

command loginlocal), and protocol-speciﬁc (AppleTalk Remote Access (ARA), CHAP,

and so forth) security.