User Manual

Troubleshoot the Packet Forwarding Engine Components
201
Chapter 18
Troubleshoot the Packet Forwarding Engine Components
This chapter discusses the following topics related to troubleshooting components of the
Packet Forwarding Engine:
 Troubleshoot FPCs on page 201
 Troubleshoot PICs on page 202
 Troubleshoot the SCB on page 202
Troubleshoot FPCs
As soon as an FPC is seated on an operating router, the Routing Engine downloads the FPC
software to it. The FPC then runs diagnostics and enables the PICs that it houses. During this
time, the green FPC LED labeled
OK on the craft interface is blinking. When the FPC is online
and functioning normally, the
OK LED lights steadily.
To troubleshoot FPCs, follow these guidelines:
 If the red FPC LED labeled
FAIL lights steadily, make sure the FPC is properly seated in
the backplane—use a Phillips screwdriver to check that the screws at the top and bottom
of the card carrier are tight.
 Issue the CLI
show chassis fpc command to check the status of installed FPCs. As shown
in the sample output, the value
Online in the column labeled State indicates that the FPC
is functioning normally:
user@host> show chassis fpc
Temp CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt DRAM (MB) Heap Buffer
0 Online 28 1 0 8 9 15
1 Online 27 1 0 8 9 15
2 Online 29 1 0 8 12 14
3 Empty
4 Empty
5 Online 25 0 0 8 8 14
6 Online 29 1 0 8 9 14
7 Online 26 1 0 8 8 13