Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
146
3.20 Problems due to the redundant configuration of the BCU, CSU, or MSU
3.20.1 Active-standby switchover is not possible
If switching between the active and standby systems is not possible, check the problem and take
action according to the following table.
Table 3-77: Problems occurring during switchover of the active system and action to take
No. Cause of the problem in
switching
Items to check
1 The standby system is not
running.
Red A fault has occurred on the standby system. Replace the board
of the standby BCU, standby CSU, or standby MSU.
Check the STATUS LED on
the standby system.
Off or orange The board is not working. Execute the
inactivate standby
and activate standby commands from the active system to
start the standby system.
Blinking green The standby system is starting. Wait a while until the STAUTS
LED is green.
Green The standby system has started. The problem in switching
seems to have occurred due to another cause. See the other
check items.
2 The standby system is not
ready for switching.
Log in to the active system.
Execute the
show system
command, and check the
status of the standby system.
fault One of the following applies:
• The standby system has failed to start.
• A prohibited combination of boards is used between the
active and standby systems. Remove the cause of the
problem, and restart the system.
• The configuration contains a setting that cannot be used.
Check the configuration.
For other cases, see No. 1.
inactive Startup of the standby system has been suppressed. Execute the
activate standby command to start up the standby system.
notconnect The standby system has not been implemented. Implement the
standby system, and then execute the
activate standby
command to start up the standby system.
initialize Startup of the standby system has not been completed. Wait a
while until the startup is complete.
active or
standby
The problem in switching seems to have occurred due to
another cause. See the other check items.
3 Any configuration operation
is being performed.
If an operation command is
executed to switch the
system, the command fails.
System switching by an operation command is not allowed during configuration
operations. Execute the
status configuration command from the active system.
Log out all the users who are operating the configuration, and then execute an
operation command to switch the system.