! 393
Chapter 30
Monitoring the SCB
You monitor and maintain the M40 router System Control Board (SCB), the control
board for the Packet Forwarding Engine, to ensure that it provides route lookups,
system component monitoring, exception and control packet transfer, and Flexible
PIC Concentrator (FPC) operation and reset control. (See Table 92.)
Table 92: Checklist for Monitoring the SCB
Monitor SCB Tasks Command or Action
Understanding the SCB on page 394
Monitoring the SCB Status on page 395
1. Display the SCB Environmental Status on page 396 show chassis environment
2. Display the SCB Detailed Status on page 396 show chassis scb
3. Check the SCB LED Status on page 397 Check the LEDs on the SCB faceplate.
Checking for SCB Alarms on page 398
1. Display SCB Error Messages in the System Log File on
page 398
show log messages
2. Display SCB Error Messages in the Chassis Daemon Log File
on page 399
show log chassisd
Verifying SCB Failure on page 400
1. Check the SCB Connection on page 400 Ensure that the SCB is securely seated. Tighten the captive
screws at the top and bottom of the SCB card carrier.
2. Perform an SCB Swap Test on page 400 Remove the failed SCB and replace it with one that you know
works.
Getting SCB Hardware Information on page 401
1. Display the SCB Hardware Information on page 401 show chassis hardware
2. Locate the SCB Serial Number ID Label on page 402 Look on the front of the SCB board near the faceplate.
3. Display the SCB Firmware Version on page 402
show chassis firmware
Returning the SCB on page 402
See “Return the Failed Component” on page 86, or follow the
return procedure in the M40 Internet Router Hardware Guide.
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