User guide

A-52 Cisco 2500 Series Access Server User Guide

Asynchronous Protocols

Modem Conﬁguration

See the section “Modems” earlier in this appendix for assistance in conﬁguring your access

server and modem for proper operation. This section will involve conﬁguring the line for

EIA/TIA-232 options, and EXEC security.

Testing the Line for EXEC Functionality

Testing for access to EXEC functionality is a critical step in the conﬁguration of the

Cisco 2500 series access server ports. The successful access to an EXEC session can help

ensure that the cabling, modem, and lines have correct conﬁgurations. A client should be

able to connect to the line and receive a hostname> prompt. Further testing might include

stress testing ﬂow control and testing error correction.

Conﬁguring PPP, SLIP, and ARA

The following sections discuss conﬁguration options for PPP, SLIP and ARA

Point-to-Point Protocol

PPP allows a remote device to connect to the access server for multiple network (Layer 3)

protocols simultaneously. For example, a PPP user could request IP, IPX, or Appletalk.

You conﬁgure PPP by conﬁguring the asynchronous interface associated with the line.

In the following example, asynchronous port 1 is being conﬁgured for PPP. These steps are

performed in conﬁguration mode, as follows:

Step 1 Enter the following commands to create and conﬁgure the asynchronous interface

for the line:

Router(config)#interface async 1