CHAPTER 34
Monitoring Redundant Control Boards
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Checklist for Monitoring Redundant Control Boards on page 665
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Redundant Control Boards Overview on page 666
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Display Redundant Control Board Hardware Information on page 669
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Display Redundant Control Board Mastership on page 670
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Switch Control Board Mastership on page 672
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Check the Control Board Alarms on page 672
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Replace a Control Board on page 672
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Return the Control Board on page 673
Checklist for Monitoring Redundant Control Boards
Purpose You monitor and maintain redundant Control Boards installed in the M320 router, T320
router, T640 router, T1600 router, TX Matrix router, or TX Matrix Plus 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 and Control Board mastership control
• Flexible PIC Concentrator (FPC) error detection and reset control
• SONET clock source generation and monitoring
• SONET reference clock monitoring (from the FPC and BIT interfaces)
• I2C controller monitoring
• Fan speed monitoring and control
For more information about monitoring a single Control Board, see
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