Cisco Systems PA-4T manual

Replacing PA-4T+ Port Adapter Cables

For a Cisco 7100 series, Cisco 7200 series, or Cisco uBR7200 series router, use the following commands:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface serial 1/0

Router(config-if)# no shutdown

Ctrl-Z

Router#

Router# copy running-config startup-config

For a VIP2, use the following commands:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface serial 3/1/0

Router(config-if)# no shutdown

Ctrl-Z

Router#

Router# copy running-config startup-config

These steps will prompt the system to poll the interface and recognize new interface immediately.

When you configure a port for a DCE interface for the first time, or when you set up a loopback test, you must set the clock rate for the port. When you connect a DCE cable to a port, the interface will remain down, the clock LEDs will remain off, and the interface will not function until you set a clock rate (regardless of the DCE mode default).

If you are changing the mode of the interface from DCE to DTE, you do not need to change the clock rate for the port. After you replace the DCE cable with a DTE cable and the system recognizes the interface as a DTE, it will use the external clock signal from the remote DCE device and ignore the internal clock signal that the DCE interface normally uses. Therefore, after you configure the clock rate on a port for either a DCE interface or loopback, you can leave the clock rate configured and still use that port as a DTE interface.

This completes the procedure for replacing a port adapter cable on the PA-4T+. Proceed to Chapter 8, “Configuring the PA-4T+ Interfaces,” to configure the interfaces on your PA-4T+.

7-4PA-4T+ Synchronous Serial Port Adapter Installation and Configuration