Monitoring the SSB

You monitor the M20 router System and Switch Board (SSB) to ensure that it provides allocation of incoming data packets throughout shared memory on the Flexible PIC Concentrators (FPCs), transfers outgoing data cells to the FPCs for packet reassembly, performs route lookups using the forwarding table, monitors system components for failure and alarm conditions, and monitors FPC operation and reset. (See Table 94.)

Table 94: Checklist for Monitoring the SSB

Monitor SSB Tasks	Command or Action
Understanding the SSB
Monitoring the SSB Status
Display the SSB Environmental Status	show chassis environment
Display the SSB Detailed Status	show chassis ssb
Check the SSB LEDs	Check the LEDs on the SCB faceplate.
Checking for SSB Alarms
Display SSB Error Messages in the System Log File	show log messages
Display SSB Error Messages in the Chassis Daemon Log File	show log chassisd | match ssb
Verifying SSB Failure
Check the SSB Connection	Check the thumbscrews on the left and right sides of the SSB.
Perform a Swap Test on the SSB	Take the SSB offline. Remove the SSB. Replace the SSB with one that you know works.
Getting SSB Hardware Information
Display the SSB Hardware Information	show chassis hardware
Locate the SSB Serial Number ID Label	Look for the SSB serial number label located on the top of the SSB adjacent to the SDRAM memory bank.
Display the SSB Firmware Version	show chassis firmware
Replacing the SSB	See Return the Failed Component, or follow the procedure in the M20 Internet Router Hardware Guide.