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
Monitoring the SCB Status
Display the SCB Environmental Status	show chassis environment
Display the SCB Detailed Status	show chassis scb
Check the SCB LED Status	Check the LEDs on the SCB faceplate.
Checking for SCB Alarms
Display SCB Error Messages in the System Log File	show log messages
Display SCB Error Messages in the Chassis Daemon Log File	show log chassisd
Verifying SCB Failure
Check the SCB Connection	Ensure that the SCB is securely seated. Tighten the captive screws at the top and bottom of the SCB card carrier.
Perform an SCB Swap Test	Remove the failed SCB and replace it with one that you know works.
Getting SCB Hardware Information
Display the SCB Hardware Information	show chassis hardware
Locate the SCB Serial Number ID Label	Look on the front of the SCB board near the faceplate.
Display the SCB Firmware Version	show chassis firmware
Returning the SCB	See Return the Failed Component, or follow the return procedure in the M40 Internet Router Hardware Guide.