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Replacing PA-4T+ Port Adapter Cables
PA-4T+ Synchronous Serial Port Adapter Installation and Configuration7-4
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, theclock LEDs will remainoff, and theinterface will notfunction until you seta clock
rate (regardless of the DCE mode default).
If you arechanging the mode of theinterface from DCE toDTE, you do not needto 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+.