Cisco 2620 User Manual

3-15
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring T1 and E1 Interfaces
Configuring T1 Interfaces
Use the following procedure to configure a new T1, CT1/PRI or CT1/PRI-CSU interface or to change
the configuration of an existing interface.
Command Purpose
Step1
Router> enable
Password: password
Router#
Enter enable mode. Enter the password.
You have entered enable mode when the prompt
changes to Router#.
Step2
Router# configure terminal
Enter configuration commands, one per line.
End with CNTL/Z.
Router(config)#
Enter global configuration mode. You have
entered global configuration mode when the
prompt changes to Router(config)#.
Step3
Router# ip routing
Router# appletalk routing
Router# ipx routing
Enable routing protocols as required for your
global configuration. This example uses IP
routing, AppleTalk routing, and Internetwork
Packet Exchange (IPX) routing.
Step4
Router(config)# controller t1 1/0
Select the CT1/PRI interface to configure. This
example configures a T1 interface in slot 1 and
unit 0.
Step5
Router(config-controller)# clock source
line
Specify which end of the circuit provides
clocking. The clock source should be set to use
internal clocking only for testing the network or if
the full T1 line is used as the channel group. Only
one end of the T1 line should be set to internal.
Step6
Router(config-controller)# framing esf
Specify the framing type.
Step7
Router(config-controller)# linecode b8zs
Specify the line code format.
Step8
Router(config-controller)# channel-group 0
timeslots 1,3-5,7
Specify the channel group and time slots to be
mapped. For multiflex trunk interfaces, only
channel 0 can be configured.
Step9
Router(config-controller)# interface serial
1/0:0
Configure each channel group as a virtual serial
interface. Specify the T1 interface, unit number,
and channel group to modify.
Step10
Router(config-if)# ip address 10.1.15.1
255.255.255.0
Assign an IP address and subnet mask to the
interface.
Step11
Router(config-if)# appletalk static
cable-range 3-3
Router(config-if)# appletalk zone ZZEth
Router(config-if)# ipx network B005
Configure routing protocols on the interface. You
must have previously enabled these protocols as
part of global configuration. In this example,
AppleTalk and IPX are being configured on the
interface.
Step12
Router(config-if)# exit
Exit back to global configuration mode.
Return to Step 4 if your router has more than one
CT1/PRI interface that you need to configure.
Step13
Router(config)# Ctrl-z
Router#
When you finish configuring interfaces, return to
enable mode.

Cisco 2620 Specifications

General

Brand	Cisco
Model	2620
Category	Network Router
Language	English