This section explains the procedure to replace network devices when it becomes necessary due to failure.
Figure 7.1 Image of Network Device Replacement
Use the following procedure, when performing replacement while continuing operations using the network devices of redundancy configurations to switch active or standby.
When there is no description, the following operations are performed by an infrastructure administrator.
Announcement of planned maintenance operations.
Log in the network device directly to check if the target network device of replacement is in active status or standby status.
When the target network device of replacement is in active status, switch over the device with the standby network device of redundancy configuration, and change the status of target network device for replacement from active status to standby status.
Change the target network device to the "maintenance mode".
Back up the current environment (such as definitions) from the network devices that are switched to "maintenance mode".
Replace the network devices. (Hardware maintenance person)
Restore the environment backed up in 4. to the network device after replacement.
Back up the current definitions from the network devices with operational status.
Check that there are no differences in the definitions in the redundancy configurations using environments backed up in 7. and environment definitions backed up in 4.
When there is difference that is a problem, log in to the network device directly after replacement, and resolve the difference.
Release the "maintenance mode" of network devices, when problems with network devices after replacement have been solved.
Notification that maintenance operations are complete.
See
For details on how to configure and release the maintenance mode, refer to "14.1 Switchover of Maintenance Mode" of the "User's Guide for Infrastructure Administrators (Resource Management) CE".
Note
Replacement using the same model is a prerequisite when replacing network devices.
Confirm the following items, using the manuals of network devices, in advance.
The replacement procedure when using redundancy configurations
The operations for network devices (status switchover, backup methods and restore methods)
Environmental differences which become problems when configuring redundancy configurations
When using the network devices of redundancy configurations, replace network devices in the following order.
Replace network devices with standby status
Set the status of the network device before replacement to standby, and replace the device
When replacing multiple network devices of redundancy configurations simultaneously, perform replacement operations in units of the same redundancy configurations.
When the network device to replace has failed, step 4. cannot be performed. It is recommended to back up environments regularly in preparation for failures of network devices.
When performing regular backup of environments, the load of restoration operations after replacement of network devices can be reduced, by using the latest backup environment.
