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Installing the PA-4T+ Interface Cables 7-3
Replacing PA-4T+ Port Adapter Cables
Following is an example of the show controllers cbus command for a VIP2 that shows an interface
port (3/1/0) that has an EIA/TIA-232 DTE cable attached:
Router# show controllers cbus 3/1/0
slot3: VIP2, hw 2.3, sw 21.40, ccb 5800FF30, cmdq 48000088, vps 8192
software loaded from system
IOS (tm) VIP Software (SVIP-DW-M), Version 11.1(8)CA, RELEASED SOFTWARE
ROM Monitor version 17.0
Mx Serial(4), HW Revision 0x2, FW Revision 1.25
Serial3/1/0, applique is RS-232 DTE
gfreeq 48000140, lfreeq 480001D0 (1536 bytes), throttled 0
rxlo 4, rxhi 81, rxcurr 1, maxrxcurr 2
txq 48001A00, txacc 48001A02 (value 6), txlimit 6
To change the mode of a port online, use software commands to shut down the interface, replace the
compact serialcable, restart the interface and,if necessary,reconfigure the portfor the new interface.
At system startup or restart, the system polls the interfaces and determines the electrical interface
type of each port (according to the type of compact serial cable attached). However, the system does
not necessarily repoll an interface when you change the adapter cable online. To ensure that the
system recognizes the new interface type, shut down and reenable the interface after changing the
cable.
If you are replacing a cable with a cable that has the same mode, these steps are not necessary
(simply replace the cable without interrupting operation).
Step 1 Enter configuration mode and at the privileged level of the EXEC (also called enable
mode), specify the port address, shut down the interface, and write the configuration to
nonvolatile random-access memory (NVRAM). (See the “Using the EXEC Command
Interpreter” section on page 8-1 for an explanation of the privileged level of the EXEC.)
Add additional configuration commands, as needed, before you exit from configuration
mode (before you press Ctrl-Z or enter end).
For a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router, use the
following commands:
Router> enable
Password:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#
For a VIP2, use the following commands:
Router> enable
Password:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# shutdown
Ctrl-Z
Router#
Step 2 Locate and remove the adapter cable to be replaced.
Step 3 Connect the new cable between the PA-4T+ and the network connection. Tighten the
thumbscrews at both ends of the cable to secure it in the ports.
Step 4 Enter configuration mode again, bring the port back up, and save the running
configuration to NVRAM.