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Configuring the Interfaces
Configuring the Interfaces
After you verify that the new OC12 POS line card is installed correctly (the STATUS LED goes on), use
the privileged-level configure command to configure the new interface. Have the following information
available:
•
•
•
•
•
If you installed a new OC12 POS line card or if you want to change the configuration of an existing
interface, you must enter configuration mode to configure the new interfaces. If you replaced an OC12
POS line card that was previously configured, the system recognizes the new interfaces and brings each
of them up in their existing configuration.
For a summary of the configuration options available and instructions for configuring the interface on
an OC12 POS line card, refer to the appropriate configuration publications listed in the
Documentation" section on page
You execute configuration commands from the privileged level of the EXEC command interpreter, which
usually requires password access. Contact your system administrator, if necessary, to obtain password
access. (See the
privileged level of the EXEC.)
On power up, the POS interface on a new OC12 POS line card is shut down. To enable the interface, you
must enter the no shutdown command in configuration mode.
When the POS interface is enabled (taken out of shutdown) with no additional arguments, the interface
configuration file parameters use the default values. (See
Table 4-1
Parameter
MTU
Framing
Loopback internal
Loopback line
Transmit clocking source
Cyclic redundancy checks crc 16
SONET payload
scrambling
OC12 Packet Over SONET Line Card Installation and Configuration
4-2
IP address, if you plan to configure the interface for IP routing
MTU size
Framing mode
Transmit clock source
Loopback modes (if testing is required)
"Using the EXEC Command Interpreter" section on page 4-1
OC12 POS Line Card Configuration Default Values
Configuration Commands
mtu bytes (no mtu bytes)
pos framing-sdh (no pos framing-sdh)
loop internal (no loop internal)
loop line (no loop line)
clock source internal
clock source line
crc 32
pos scramble-atm (no pos
scramble-atm)
8.
Table 4-1
Chapter 4
Configuring the OC12 POS Line Card
"Related
for an explanation of the
for parameters and default values.)
Default Value
4470 bytes
SONET framing
No internal
loopback
No line loopback
Loop timing
16-bit CRC
No SONET payload
scrambling
OL-3437-01
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