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Laser Is Shut off After Deleting the Client Side 1+1 Protection Group, the Standby Channel of Which Is the Client Side Port of a Slot Whose Physical Board Is Inconsistent with Its Logical Board

Publication Date:  2012-07-25 Views:  111 Downloads:  0

Issue Description

A client-side port of a board is on the protection channel of a client-side 1+1 protection group (only the protection group where the SCS selectively receives services). The physical board, however, is consistent with the logical board. Delete the client-side 1+1 protection group and delete the logical board. Then, add the logical board that is consistent with the physical board. The laser of the port configured with client-side 1+1 protection is disabled (if the new logical board has the corresponding port).
For example, slot 2 of NE1 houses the LSX board and the IP3 port is on the protection channel of client-side 1+1 protection of the board housed in slot 1.Then, delete the client-side 1+1 protection group and delete the logical LSX of slot 2. Finally, add a logical LDGD board for slot 2. Query IP3 port of the LDGD. The query result shows that the laser is shut down. After the service is configured, the laser is still shut down. 

Alarm Information


Handling Process

1. In the actual application, do not insert the physical board inconsistent with the logical board in the slot where the protection channel of a client-side 1+1 protection group is located.
2. In the previous situation, if the client-side laser of the board is shut down, issue a command to turn on the laser. 

Root Cause

After the protection group is deleted, the client-side 1+1 protection group must be recovered to the working channel according to the specifications. In this case, a command should be issued to the protection channel to disable the laser through an emergency channel. As the board type is ignored when the command is issued, the board receives the command to disable the laser. When you delete the protection and delete the logical board, and add a new logical board, the board does not receive any other command for disabling the laser. Therefore, the laser of the port on the board keep shut down.