Cisco Systems 3825 manual Configuring E1 Controllers, Enter the clocking source

Chapter 4 Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the Command-Line

Configuration Sequence

Note When you are using the card type command to change the configuration of an installed card, you must enter the no card type {e1 t1} slot subslot command first. Then enter the card type {e1 t1} slot subslot command for the new configuration information.

Configuring E1 Controllers

Use the following instructions to perform a basic E1 controller configuration: specifying the E1 controller, entering the clock source, specifying the channel-group, configuring the serial interface, configuring PPP encapsulation, and enabling keepalive packets. You might also need to enter other configuration commands, depending on the requirements for your system configuration and the protocols you plan to route on the interface.

Note In the following procedure, press the Return key after each step unless otherwise noted. At any time, you can exit the privileged level and return to the user level by entering disable at the Router# prompt.

To configure the E1 controllers, follow these steps, while in the global configuration mode:

Step 1 Specify the controller that you want to configure. Controller E1 0/0/0 maps to the first port of the Cisco 2-port T1/E1-RAN interface card in slot 0. Controller E1 0/0/1 maps to the second port of the Cisco 2-port T1/E1-RAN interface card in slot 0.

Router(config)# controller e1 slot/subslot/port

For example, the following command specifies the E1 controller as the first port of the

Cisco 2-port T1/E1-RAN interface card in slot 0:

Router(config)# controller e1 0/0/0

You have entered the controller configuration mode when the prompt changes to

Router(config-controller)#.

Step 2 Enter the clocking source.

Router(config-controller)#clock source {line [primary] internal}

Where:

•line—Specifies the E1 line from which the clocking is taken.

•internal—Specifies internal clocking.

•primary—Primary clock source.

For example, the following command configures the clock source for the E1 controller:

Router(config-controller)# clock source line

Note When you are using the clock source {line [primary] internal} command to change the configuration of an installed card, you must enter the no clock source {line [primary]

internal} command first. Then enter the clock source {line {primary] internal} command for

the new configuration information.

	Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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