Channelized T1 Port Adapter Installation and Configuration 47
Configuring 2CT1 Interfaces
In the following example, unused timeslots 2, 6, and 8 through 23 are mapped to unused
channel group 2, and channel group 2 is shut down:
Router(config)# controller t1 1/1
Router(config-controller)# channel-group 2 timeslots 2,6,8-23
Router(config-controller)#
Router(config-controller)# interface serial 1/1:2
Router(config-if)# shutdown
Router(config-if)# exit
Router(config)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1:2,
changed state to down
%LINEPROTO-5-UPDOWN: Interface Serial1/1:2, changed state to
administratively down
Step 12
After including all of the configuration commands, to complete the configuration, press
Ctrl-Z (hold down the Control key while you press Z) or enter end to exit configuration
mode and return to the EXEC command interpreter prompt as follows:
Router(config)#
Ctrl-Z
Router#
Step 13
Write the new configuration to memory as follows:
Router# copy running-config startup-config
[OK]
Router#
The system displays an OK message when the configuration is stored.
Step 14
Exit the privileged level and return to the user level by entering disable at the prompt as
follows:
Router# disable
Router>
This completes the procedure for creating a basic channelized T1 ISDN PRI configuration. Proceed
to the section “Checking the Configuration” to check the interface configuration using show
commands. For dialer interface configuration and additional channelized T1 ISDN PRI interface
configuration information, refer to the publications Wide-Area Networking Configuration Guide and
Wide-Area Networking Command Reference.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new
interface or all interfaces, and use the ping and loopback commands to check connectivity.
Using show Commands to Verify the New Interface Status
The following steps use show commands to verify that the new interfaces are configured and
operating correctly:
Step 1
Display the system hardware configuration with the show version command. Ensure that
the list includes the new serial interfaces.
Step 2
Display all the current interfaces with the show controllers command.
