%DEC21140-5-NOCARR: FastEthernet0/0 cable/connector problem?

Level: - Intermediate
Platform: - Cisco switches and routers running Cisco IOS
Keywords: - %DEC21140-5-NOCARR: FastEthernet0/0 cable/connector problem? %DEC21140-5-NOCARR: DSI-Fastethernet 0/2/0 Cable/Connector problem?
Reference: - cisco.com
Author: - Dinesh Aggarwal

The Problem:-
I am seeing this message pop-up whenever I boot a 7100 or 7200 router.
%DEC21140-5-NOCARR: FastEthernet0/0 cable/connector problem?
I'm able to boot even after this, but I couldn't find a way to stop this message popping up?

The solution:-

The connection to the switch is fine (the port LED comes up) and I'm able to ping to a TFTP server in the same network as that of FastEthernet0/0. So this should prove that there is no problem with the

%DEC21140-5-NOCARR: DSI-Fastethernet 0/2/0 Cable/Connector problem?

This error message indicates that the router-shelf has lost connectivity to the dial-shelf, through the Dial Shelf Interconnect (DSI) cable, connected to port 0/2/0 on the router-shelf. Issue the show dsi command to verify that the connection between the router-shelf and dial-shelf is up. Verify that both the interface and the line protocol are in an UP state. For example:

AS5800#show dsi
DSI-Fastethernet0/2/0 is up, line protocol is up 
!--- Interface is UP/UP
Hardware is DEC21140A, address is 00d0.d342.4c38 (bia 00d0.d342.4c38)
!--- Output suppressed

Perform these steps if the connection between the router-shelf and dial-shelf is not in the UP state:

  1. If the DSI-Fastethernet interface is not UP, perform a no shutdown on the interface.
  2. Check whether the dial-shelf interconnect port adapter-enabled LED is on.

If it is not, verify that the interconnect port adapter is seated properly and that the port adapter levers are in the locked position. You can also try to reseat the port adapter.
If power is supplied to the router-shelf, but the enabled LED remains off, the system has detected a hardware failure. You need to replace the interconnect port adapter.

  1. Verify that the link LED on the DSI Port Adapter is on.

2.The link LED indicates an active connection to the dial-shelf. This LED lights when the dial-shelf interconnect port adapter is receiving a carrier signal from the dial-shelf.
If the link LED remains off, check the Dial-Shelf Interconnect Cable (DSIC) connection and tighten the jack screws at both ends of the cable.

  1. Replace the DSI Cable (Part number CAB-DSIC-5= or CAB-DSIC-20=). Make sure that the new cable is properly secured.

The dial-shelf interconnect port adapter contains a single RJ-45 receptacle, which is used to connect the router-shelf to the dial-shelf. The cable used for this connection is a Cisco proprietary cable, customized with jackscrews to secure the connection. You must use this specially designed cable that shipped with your dial-shelf interconnect port adapter to connect the dial-shelf to the router-shelf.
For more detailed information refer to document below.


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