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To display the alarming information or fault detection parameters of a transceiver module:
Task Command
Remarks
Display the current alarm
information of the transceiver
module in a specified interface.
display transceiver alarm
interface
[
interface-type
interface-number
]
Available for all transceiver
modules.
For more information about the transceiver module displaying commands, see
HPE FlexNetwork
HSR6800 Routers Command References
.
Active and standby switchover for MPUs
CAUTION:
Do not execute any command on the standby MPU.
A router can be configured with two MPUs of the same model, one acting as the active MPU and the
other as the standby MPU. The standby MPU uses the synchronization function to keep its
configuration consistent with the current configuration of the active MPU. When the active MPU fails,
the standby MPU immediately takes over using the same configuration as the previous active MPU,
and guarantees that the router operates correctly. The process is called an active and standby
switchover.
An active and standby switchover is triggered in the following conditions:
•
The active MPU fails.
•
The active MPU is unplugged.
•
Remotely performing an active and standby switchover through SNMP.
•
Manually executing the command for active and standby switchover.
Active/standby switchover is implemented in the following workflow:
1.
The standby MPU automatically connects to and controls the system bus, and at the same time,
the former active MPU disconnects from the system bus.
2.
The standby MPU becomes an active MPU, and the former active MPU automatically reboots
and becomes a standby MPU.
You can use the
slave switchover
command to trigger an active and standby switchover. For more
information about the command, see
HPE FlexNetwork HSR6800 Routers High Availability
Command Reference
.
When the standby MPU is started, the active MPU performs initial synchronization for the standby
MPU. During the synchronization process, if you press
Enter
on the configuration terminal, the
system prompts that you cannot execute any command on the active MPU or standby MPU. After
the initial synchronization process is complete, you can execute configuration commands on the
active MPU, and the configurations of the active MPU are real-time synchronized (copied) to the
standby MPU, so that the active MPU and the standby MPU can have the same configurations.
Troubleshooting system exceptions
Configuring the exception handling methods
When the system detects faults (such as system instruction faults, invalid addresses, data overflow,
null pointers, and division by zero operations) during the operation of the active MPU or standby
MPU, you can solve the problem in one of the following methods:
•
reboot
—Rebooting the failed MPU so that the MPU restores to normal operating status.
