This section explains the procedure to replace network devices when it becomes necessary due to failure.
Figure 9.4 Image of Network Device Replacement
It is premised that you perform replacement while continuing operations using the network devices of redundancy configurations of active and standby switch structure.
When there is no description, the operations are performed by an infrastructure administrator.
This section explains replacement procedure when device that is targeted to replace is a breakdown
When the Management Function for Network Device Configuration Files is not Used
Announcement of planned maintenance operations.
Change the target network device to the "maintenance mode".
Replace the network devices. (Hardware maintenance person)
Restore configuration of replaced network device along by maintenance procedure of network device.
Release the "maintenance mode" of network devices, when problems with network devices after replacement have been solved.
Notification that maintenance operations are complete.
When the Management Function for Network Device Configuration Files is Used
Announcement of planned maintenance operations.
Change the target network device to the "maintenance mode".
Replace the network devices. (Hardware maintenance person)
Restore configuration of replaced network device using network device file which was backed up beforehand along by maintaining procedure of the network device
When operating restoration to log in to replaced network device directly.
Export network device file which was backed up beforehand with rcxadm netdevice cfexport command.
Restore exported network device file along by maintenance procedure of the network device.
When operating restoration to use the restoration function of the management function for network device file
Configure replaced network device definition that are needed in operation management.
Restore network device file.
Information
When replaced network device is "Cisco ASA 5500 series", operating restoration by rcxadm netdevice cfrestore command is not required.
By function of "Cisco ASA 5500 series", same configuration as device of active state is reflected automatically.
For detail, please refer to manual of "Cisco ASA 5500 series".
For restoration of network device file, please refer to "10.2.3 Restoration of Network Devices".
For maintenance procedure of network device, please refer to manual of network device.
Back up the current network device files from the network devices with operational status.
If the content of the backed up device configuration file is up to date, this step is not required.
If the content is not the up to date, take a backup of the network device configuration file using the rcxadm netdevice cfbackup command.
The date and time of backup can be checked using the rcxadm netdevice cflist command.
Check that there are no differences in the definitions that become a problem in the redundancy configurations using the network device files used in 4. and the network device configuration file in the network device file backed up in 5.
Export each network device configuration file with rcxadm netdevice cfexport command and check the difference.
When there is difference that becomes a problem, please resolve difference following maintenance procedure of network devices.
For maintenance procedure of network device, please refer to manual of network devices.
Release the "maintenance mode" of network devices, when problems with network devices after replacement have been solved.
Notification that maintenance operations are complete.
This section explains replacement procedure when network device that is target of restoration is undamaged.
When the management function for network device configuration files is not used
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 configuration of replaced network device using environment backed up in procedure 4.along by maintenance procedure of network device.
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.
When the management function for network device configuration files is used
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 network device files from the network devices that are switched to "maintenance mode".
If the content of the backed up device configuration file is up to date, this step is not required.
If the content is not the up to date, take a backup of the network device configuration file using the rcxadm netdevice cfbackup command.
The date and time of backup can be checked using the rcxadm netdevice cflist command.
Replace the network devices. (Hardware maintenance person)
Information
When registering "Nexus 5000 series" as network device using the management function for network device file, please confirm the note of "9.4.8.2 When using management function of file for configuration of network device" in the "Design Guide CE" before executing restoration in the procedure 6..
Restore configuration of replaced network device using network device file which was backed up in procedure 4.along by maintenance procedure of the network device.
When operating restoration to log in to replaced network device directly.
Export network device file which was backed up in procedure 4. with rcxadm netdevice cfexport command.
Restore exported network device file along by maintenance procedure of the network device.
When operating restoration to use the restoration function of the management function for network device file
Configure replaced network device definition that are needed in operation management.
Restore network device file.
Information
When replaced network device is "Cisco ASA 5500 series", operating restoration by rcxadm netdevice cfrestore command is not required.
By function of "Cisco ASA 5500 series", same configuration as device of active state is reflected automatically.
For detail, please refer to manual of "Cisco ASA 5500 series".
For restoration of network device file, please refer to "10.2.3 Restoration of Network Devices".
For maintenance procedure of network device, please refer to manual of network device.
Back up the current network device files from the network devices with operational status.
If the content of the backed up device configuration file is up to date, this step is not required.
If the content is not the up to date, take a backup of the network device configuration file using the rcxadm netdevice cfbackup command.
The date and time of backup can be checked using the rcxadm netdevice cflist command.
Check that there are no differences in the definitions that become a problem in the redundancy configurations using the network device file used in 4. and the network device configuration file in the network device file backed up in 7.
Export each network device configuration file with rcxadm netdevice cfexport command and check the difference.
When there is difference that becomes a problem, please resolve difference following maintenance procedure of network devices.
For procedure maintenance of network device, please refer to manual of network devices.
Release the "maintenance mode" of network devices, when problems with network devices after replacement have been solved.
Notification that maintenance operations are complete.
See
When checking configuration of network device, you may not confirm it from network device environment file. Please confirm that it is possible to check configuration of network device from network device environment file by manual of network device in advance.
For details on how to configure and release the maintenance mode, refer to "22.1 Switchover of Maintenance Mode" in the "User's Guide for Infrastructure Administrators (Resource Management) CE".
For details on the rcxadm netdevice command, refer to "3.8 rcxadm netdevice" in the "Reference Guide (Command/XML) 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 check and switchover)
Environmental differences which become problems when configuring redundancy configurations
When the management function for Network device configuration file is not used, confirm the following item, using the manuals of network devices, in advance.
The operations for network devices (backup methods and restore methods)
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.
