Specifications

45
Channelized and Electrical Interface Line Card Installation and Configuration
78-16417-02
Configuring and Troubleshooting Line Card Interfaces
Step 5 Set the clock source to line or internal:
Router(config-controller)# [no] clock source {line | internal}
Use the no form of this command to restore the default value, which is line.
Step 6 Change the OC-12/STM4 controller loopback mode:
Router(config-controller)# [no] loopback {line | internal}
Use the no form of this command to clear the loop setting.
Step 7 Change the S1S0 bit definition:
Router(config-controller)# [no] POS flag S1S0 <0-3>
Use the no form of this command to clear the loop setting.
The no shutdown command passes an enable command to the CHOC-12/STS3 IR-SC line card. It also
causes the line card to configure itself, based on the current configuration parameter values.
Step 8 Change the shutdown state to up and enable the controller:
Router(config-controller)# [no] shutdown
The no shutdown command passes an enable command to the CHOC-12/STS3 IR-SC line card. It also
causes the line card to configure itself based on the current configuration parameter values.
Table 26 shows default values for an OC-12/STM4 controller configuration of a 1-port channelized
OC-12/STM-4 (OC-3) line card in a Cisco 12000 Series Router.
Note Scrambling on the 1-port channelized OC-12/STM-4 (OC-3) line card controller is always
enabled; it is not user configurable.
Table 26 1-Port Channelized OC-12/STM-4 (OC-3) Line Card Controller Configuration Default
Value s
Parameter Configuration Command Default Value
Alarm reporting [no] POS report [b3-tca | pais | plop | prdi] b3-tca, plop
C2 byte [no] POS flag C2 <0-255> 0x00
clock source [no] clock source [internal | line] line
Cyclic redundancy check [no] crc [16 | 32] crc 16
keepalive [no] keepalive <n> 10 sec
loopback [no] loopback [internal | line] no loopback
Maximum transmission unit
(MTU)
[no] mtu bytes 4470 bytes
Payload scrambling [no] POS scramble-atm no scrambling