Monitoring Redundant MCSs

You monitor and maintain redundant Miscellaneous Control Subsystems (MCSs) installed in the M40e or M160 router to ensure that there is no interruption of functions such as the following:

• Router component monitoring and control for failure and alarm conditions
• Component power-up and power-down control
• Redundant Routing Engine, MCS, and PFE Clock Generator (PCG) mastership control
• Flexible PIC Concentrator (FPC) error detection and reset control
• SONET clock source generation and monitoring
• SONET reference clock (from the FPC and BIT interfaces) monitoring
• System clocks (from the PCG) monitoring

For more information about monitoring a single MCS, see Monitoring the MCS.

Table 121 provides a checklist of tasks you perform to monitor redundant MCSs.

Table 121: Checklist for Monitoring Redundant MCSs

Monitor Redundant MCS Tasks	Command or Action
Understanding Redundant MCSs
Displaying Redundant MCS Hardware Information	show chassis hardware
Monitoring Redundant MCS Status
Check the Redundant MCS Environmental Status	show chassis environment mcs
Check the Redundant MCS Status from the Craft Interface	show chassis craft-interface
Check the Redundant MCS LED Status	Check the LEDs on the MCS faceplate.
Displaying Redundant MCS Mastership
Check the Redundant MCS Environmental Status	show chassis environment mcs
Check the Redundant MCS Status from the Craft Interface	show chassis craft-interface
Check the Redundant MCS LED Status	Check the LEDs on the MCS faceplate.
Switching MCS Mastership	Manually take the MCS offline by pressing the offline button on the component faceplate.
Performing a Swap Test on a Redundant MCS	Take the host module offline. Take the MCS offline. Remove the MCS and replace it with one that you know works.
Returning an MCS	See Return the Failed Component, or follow the procedure in the M40e or M160 router hardware guide.