Cisco Systems OC-12/STM-14 Manual De Usuario

(Remainder of displayed text omitted from example)

 shows the default OC-12 controller configuration of a 1-port channelized OC-12/STM-4 (DS3) 

line card in a Cisco 12000 Series Router. In controller configuration mode, select an OC-12 controller 
for configuration using the controller oc12 slot/port command. 

The following steps make up a basic controller configuration for the 1-port channelized OC-12/STM-4 
(DS3) line card on a router.

Enter global configuration mode by entering configure terminal at the privileged EXEC prompt:

Router# configure terminal

Router(config)#

Enter controller configuration mode by entering the controller OC-12 slot/port global configuration 
command and specify the router slot number and port number: 

Router(config)# controller OC12 1/0

Router(config-controller)#

Set the clock source by entering the clock source controller configuration command and specify line or 
internal:

Router(config-controller)# [no] clock source {line | internal}

Use the no form of this command to restore the default value, line.

To change the OC-12 controller payload scrambling:

Router(config-controller)# [no] scramble

Use the no form of this command to remove scrambling. The default value is scrambling.

To change the OC-12 controller loopback mode:

Router(config-controller)# [no] loopback {line | internal}

Use the no form of this command to remove the loop.

To change the shutdown state to up and enable the controller, enter the no shutdown controller 
configuration command: 

Router(config-controller)# [no] shutdown

The no shutdown command passes an enable command to the 1-port channelized OC-12/STM-4 (DS3) 
line card. It also causes the line card to configure itself based on the previous configuration commands 
sent.

Clock source

line

Loop internal

no loopback

Shutdown

no shutdown