Troubleshooting the T640 SIBs

Problem

• The green OK LED on the SIB faceplate is lit.
• The yellow FAIL LED on the SIB faceplate is not lit.

• The yellow FAIL LED on the SIB faceplate is lit.
• The green OK LED on the SIB faceplate is not lit.
• A red alarm indicates that the SIB failed or has been removed.
• A yellow alarm indicates that a spare SIB has failed or has been removed.

Solution

1. Check the LEDs on the faceplate of each SIB.
2. Check the LEDs on the craft interface.
3. Use the CLI to check for alarms.
   • Standalone T640 router—Issue the show chassis alarms command to view the alarms.
   • T640 router in a routing matrix—Issue the show chassis alarms lcc lcc-number command to view the alarms.

In Table 1, the text in the column labeled ”LCD Message” appears in the display of the craft interface. The text in the column labeled “CLI Message” appears in the output from the show chassis alarms command.