! 559
Chapter 42
Monitoring Redundant Control Boards
You monitor and maintain redundant Control Boards installed in the M320 router,
T320 router, or T640 routing node 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)
! I
2
C controller monitoring
! Fan speed monitoring and control
For more information about monitoring a single Control Board, see “Monitoring the
Control Board” on page 301.
Table 119 provides a checklist of tasks you perform to monitor redundant Control
Boards.
Table 119: Checklist for Monitoring Redundant Control Boards
Monitor Redundant Control Board Tasks Command or Action
Understanding Redundant Control Boards on page 561
Displaying Redundant Control Board Hardware
Information on page 563
show chassis hardware
Displaying Redundant Control Board Mastership on page 563
1. Check the Redundant Control Board Environmental Status
on page 564
show chassis environment cb
2. Check the Redundant Control Board Status from the Craft
Interface on page 565
show chassis craft-interface
3. Check the Redundant Control Board LED Status on
page 565
Examine the LEDs on the Control Board faceplate.
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