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CHAPTER
Configuring the PA-4T+ Interfaces 8-1
8
Configuring the PA-4T+ Interfaces
To continue your PA-4T+ port adapter installation, you must install the port adapter cables and
configure thePA-4T+ interfaces.The instructionsthat follow applyto allsupported platforms.Minor
differences between the platforms are noted. This chapter contains the following sections:
• Using the EXEC Command Interpreter, page 8-1
• Identifying Port Adapter Slot and PA-4T+ Interface Port Numbers, page 8-2
• Shutting Down an Interface, page 8-5
• Performing a Basic Configuration, page 8-8
• Configuring Timing (Clock) Signals, page 8-9
• Configuring Half-Duplex and Binary Synchronous Communications, page 8-12
• Checking the Configuration, page 8-14
If you installed a new PA-4T+ or if you want to change the configuration of an existing interface,
you must enter configuration mode using the configure command. If you replaced a PA-4T+ that
was previously configured, the system will recognize the new PA-4T+ interfaces and bring each of
them up in their existing configuration.
After you verify that the new PA-4T+ is installed correctly (the enabled LED goes on), use the
privileged-level configure command to configure the new interfaces. Be prepared with the
information you will need, such as the following:
• Protocols you plan to route on each new interface
• IP addresses if you will configure the interfaces for IP routing
• Whether or not the new interfaces will use bridging
• Timing source for each new interface and clock speeds for external timing
For a summary of the configuration options available and instructions for configuring interfaces on
the PA-4T+, refer to the appropriate configuration publications listed in the “Related
Documentation” section on page vi.
Using the EXEC Command Interpreter
You modify the configuration of your router through the software command interpreter called the
EXEC (also called enable mode). You must enter the privileged level of the EXEC command
interpreter with the enable command before youcan use the configure command to configure anew
interface or to change the existing configuration of an interface. The system prompts you for a
password if one is set.