Prerequisites

Operating Procedures

1. Select the spare part.
   • Select a spare board whose veneer parameters are identical to those of the veneer being replaced.
   • If the veneer supports the compatible replacement function, you can confirm the replaceable veneer according to the compatible replacement relationship.
2. Query the current alarms of the veneer.
3. Replace the board.
   Description:

   • Unplugging the veneer will report BD_STATUS and COMMUN_FAIL alarms, and the alarms will be released automatically after the new veneer comes online.
   • The main board is the working board on the network management, the standby board is the protection board on the network management, and the current board refers to the single board that is currently working.
   • Replace only the standby board. Remove and replace the faulty single board.
   • Replace only the primary board.
     1. Determine whether a primary and backup reversal has occurred.
        1. Right-click on the network element icon and select "Network Element Manager".
        2. In the "Function Tree", select "Configuration > Single Board 1+1 Protection".
        3. In the "1+1 Protection Relationship List", if the parameter values of the "current board" and "working board" are the same, no master-standby reversal occurs; if the parameter values are different, reversal occurs and the master board is directly replaced. Replace the main board directly.
     2. Judge whether the current backup board is working normally. If it is working normally, the indicator of the backup board (STAT) is green. If the current spare board does not work properly, see "Replacing the Primary and Spare Boards".
     3. Reverse the master and standby for this cross-clock board in the network management.
        1. Right-click on the network element icon and select "Network Element Manager".
        2. In the "Function Tree", select "Configuration > Single Board 1+1 Protection".
        3. In the "1+1 Protection Relationship List", select "Cross-Protection Pair" of the network element, and then select "Work Protection Inversion" in the right-click menu. Click "Confirm" in the pop-up dialog box. The dialog box of "Operation Result" pops up, click "Close".
     4. Remove and replace the veneer to be replaced.
        Description

        Unplugging the veneer will report BD_STATUS and COMMUN_FAIL alarms, and the alarms will be lifted when the new board comes online.

     5. Check and confirm that the current spare board is working properly.
     6. Use the webmaster to undo the inversion.
        1. Right-click on the network element icon and select "Network Element Manager".
        2. In the "Function Tree", select "Configuration > Single Board 1+1 Protection".
        3. In the "1+1 Protection Relationship List", select "Cross-Protection Pair" of the network element, and then select "Restore Working Protection" in the right-click menu. Click "Confirm" in the pop-up dialog box. The "Result" dialog box pops up, and then click "Close".
        4. Click Query. The "Result" dialog box pops up, and you can click "Close". If the current board displays the working board position, it means that the inversion has been successfully lifted.
     7. Verify that the board is working normally. Observe the indicator light (STAT) of the single board, which is green and long, indicating that the single board is working normally. Query the single-board alarms, no new abnormal alarms.
   • Replace the primary and backup boards.
     1. Replace the spare board.
     2. Query the current alarm of the network element, when the HSC_UNAVAIL alarm disappears, it means that the standby cross-clock board is working normally. Reverse the master and standby again.
     3. Perform a master-standby reversal for this cross-clock board in the network management.
        1. Right-click on the network element icon and select "Network Element Manager".
        2. In the "Function Tree", select "Configuration > Single Board 1+1 Protection".
        3. In the "1+1 Protection Relationship List", select "Cross-Protection Pair" of the network element, and then select "Work Protection Inversion" in the right-click menu. Click "Confirm" in the pop-up dialog box. The dialog box of "Operation Result" pops up, click "Close".
     4. Remove and replace the veneer to be replaced.
     5. Restore the primary and backup status of the single board.
        1. Right-click on the network element icon and select "Network Element Manager".
        2. In the Function Tree, select Configuration > Single Board 1+1 Protection.
        3. In the "1+1 Protection Relationship List", select "Cross-Protection Pair" of the network element, and then select "Restore Working Protection" in the right-click menu. Click "Confirm" in the pop-up dialog box. The "Result" dialog box pops up, and then click "Close".
        4. Wait at least five minutes and click Query. The Operation Result dialog box pops up, and you can click Close. If the current board displays the working board position, it means that the inversion has been successfully lifted.
        Explanation:

        If you get an error when restoring the master and backup status of the single board, it may be that the master and backup single boards are still being backed up, so wait for at least five minutes before performing the restoration operation.

     6. Verify that the single board is working properly. Observe the indicator light (STAT) of the single board, which is green and long, indicating that the single board is working normally. Query the single-board alarms, no new abnormal alarms.