Active And Standby Switchover For Mpus - H3C SR6604 Installation Manual

To do...
Display the current alarm
information of the transceiver
module in a specified
interface
NOTE:
For more information about the transceiver module displaying commands, see the
Fundamentals Command Reference

Active and standby switchover for MPUs

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. When RPE-X1 MPUs are used, the MPU in slot 0 is the active MPU by default.
When RSE-X1 MPUs are used, the MPU in slot 1 is the active MPU by default. 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 properly. 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:
The standby MPU automatically connects to and controls the system bus, and at the same time, the
1.
former active MPU disconnects from the system bus.
The standby MPU becomes an active MPU, and the former active MPU automatically reboots and
2.
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 the H3C SR6600 Routers High Availability Command Reference.
CAUTION:
Do not execute any command on the standby MPU.
•
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.
Do not use the H3C SR6602-specific software to upgrade the H3C SR6604/6608 routers. Otherwise,
•
the system will fail.
Use the command...
display transceiver alarm interface [ interface-type
interface-number ]
.
62
Remarks
Available for all
transceiver modules
H3C SR6600 Router