5-2
PA-8T-232 Synchronous Serial Port Adapter Installation and Configuration
OL-3562-03
Chapter 5 Configuring the PA-8T-232 Interfaces
Configuring the EIA/TIA-232 Interfaces
Configuring the EIA/TIA-232 Interfaces
After you verify that the new PA-8T-232 is installed correctly (the enabled LED goes on), use the
privileged-level configure command to configure the new interfaces. Have the following information
available:
•
Protocols you plan to route on each new interface
•
IP addresses, if you plan to configure the interfaces for IP routing
•
Bridging protocols you plan to use
•
Clock timing source you plan to use for each new interface and clock speeds for external timing
If you installed a new PA-8T-232 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 a PA-8T-232 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 interfaces on a
PA-8T-232, refer to the appropriate configuration publications listed in the
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
“Using the EXEC Command Interpreter” section on page 5-1
for an
explanation of the privileged level of the EXEC.)
This section contains the following subsections:
•
Shutting Down an Interface, page 5-2
•
Performing a Basic Configuration, page 5-8
•
Configuring Timing (Clock) Signals, page 5-10
•
Configuring NRZI Format, page 5-13
•
Configuring Cyclic Redundancy Checks, page 5-14
Shutting Down an Interface
Before you remove an interface that you will not replace, replace a compact serial cable, or replace port
adapters, use the shutdown command to shut down (disable) the interfaces to prevent anomalies when
you reinstall the new or reconfigured interface processor. When you shut down an interface, it is
designated administratively down in the show command displays.
Follow these steps to shut down an interface:
Step 1
Enter the privileged level of the EXEC command interpreter (also called enable mode). (See the
the EXEC Command Interpreter” section on page 5-1
for instructions.)
Step 2
At the privileged-level prompt, enter configuration mode and specify that the console terminal is the
source of the configuration subcommands, as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3
Shut down interfaces by entering the interface serial subcommand (followed by the interface address
of the interface) and then enter the shutdown command.
shows the command syntax.
