How to back up NE data for Huawei WDM & OTN device replacement?

During Huawei WDM & OTN network maintenance and construction, boards or devices may be replaced. Before performing these risky operations, you must back up the data of the NE to be operated to ensure that the rollback can be performed successfully if the operation fails. In this way, services on the live network are not affected. 

The following describes several common methods of backing up and restoring NE data (Using the OptiX OSN 8800 as an example) 

 

Backing Up the NE Database to the SCC Board

You need to back up the NE database during daily maintenance, to ensure that the SCC board of the NE automatically restores to normal operation after a data loss or equipment power failure. When you back up the NE database to the SCC board, you actually back up the NE data in the DRDB database of the SCC board to the Flash database. When the NE is restarted after a power failure, the SCC board automatically reads the configuration from the FLASH and issues the configuration to the boards.

 

Manually Backing Up the NE Database to a CF Card

You need to back up the NE database during the daily maintenance. You can back up the NE data in the DRDB database of the system control board to a CF card manually, to ensure the automatic restoration of the operation after the data in the DRDB database is lost on the system control board or a power failure occurs on the equipment.

Backing Up Device Data to the NMS Server or the NMS Client

This section describes how to back up the latest NE (configuration) data to the NMS server or NMS client as required in case of NE maintenance or upgrade/downgrade.

Restoring the NE Database from the SCC Board

When the database file is lost due to the NE maintenance or NE fault, you can restore the NE data from the DRDB database file that is already backed up to the Flash database on the SCC board.

Restoring the NE Database from the CF Card

When the database file is lost due to the NE maintenance or NE fault, you can restore the NE data from the DRDB database file that is already backed up on the CF card.

Recovering Device Data from the NMS Server or the NMS Client

This operation describes how to recover the device data from the NMS Server or the NMS Client.

Comparison of NE Data Backup and Restoration Methods

Backup and Restoration Method

Storage

Application Scenario

Back up/Restore the NE database to/from  an SCC board

Flash database on the SCC board

NE fault recovery scenarios such as data loss for an NE control board, NE power-off, or replacement of an NE control board

Backs up the NE configuration data in the control board (no CF card is configured) to the flash database.

During the restoration, after a warm or cold reset on the control board, the control board reads the configuration from the flash database and issues the configuration to other boards.

The backup procedure is the same as that in the scenario of backing up NE data to the CF card. If a CF card is installed, NE data is backed up to the CF card because the CF card has a larger capacity than the control board. If no CF card is available, NE data is backed up to the control board.

NE data can also be backed up to the flash memory of the control board to ensure data security in case of NE power-off within half an hour after NE configuration modification.

Back up/Restore the NE database to/from a CF card

CF card

NE fault recovery scenarios such as data loss for an NE control board, NE power-off, or replacement of an NE control board

Backs up the NE configuration data in the SCC board (a CF card is configured) to the CF card.

During the restoration, the database is restored from the CF card to the SCC board. After a warm or cold reset on the SCC board, the memory database on the SCC board is updated. Then, after the warm resets on other boards, the NE memory data is issued to the boards.

Frequent manual data backup on the CF card is not recommended, for example, do not perform manual data backup after each configuration data modification. This is because the NE automatically backs up data every 24 hours, which meet deployment and maintenance requirements, while frequent backup operations make CF cards wear and shorten their lifecycle.

Back up the NE configuration data to a U2000 server or client/Restore the NE configuration data from the U2000 server or client

U2000 server or client

Fault recovery or NE upgrade/downgrade scenario

This method applies to quick NE configuration data restoration when both the control board and CF card are faulty.

Backs up data before an upgrade/downgrade operation. The data can be used to restore the NE to the original state when an upgrade/downgrade operation fails.

Stores the data in the computer where the U2000 server or client resides.

Note: 

The SCC boards of the OptiX OSN 8800 support CF cards.

The SCC boards of the OptiX OSN 6800 support CF cards.

The SCC board of the OptiX OSN 3800 does not support CF cards.

The SCC boards of the OptiX OSN UPS support CF cards.

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