M:N Protection

M:N protection groups efficiently protect working cross-connect boards. In this user interface, you can query board protection groups and perform protection switching.

Navigation Path

In the NE Explorer, click an NE and choose Configuration > M:N Protection from the Function Tree.

NOTE:

M:N protection: protects cross-connect boards in a shared manner, that is, uses M protection boards to protect N working boards.
The OptiX OSN 9600/9800 U32 allows 7 cross-connect boards, and the OptiX OSN 9600/9800 U64 allows 14.

Button Description

Button		Description
Query	Query Protection Group	Queries the switching status and protocol status of protection groups from the NE.
Query	Query Protection Group Status	Queries the switching status of the protection group from the NE.
Function	Locked Switching	Locks switching. If you lock switching for the working board, services are locked to the working board and will not be switched to the protection board. If you lock switching for the protection board, the protection board does not provide protection. During this operation, you can select only one record.
	Manual Switching	Switches services manually between the working and protection boards. During this operation, you can select only one working board and one protection board.
	Forced Switching	Switches services forcibly between the working and protection boards. During this operation, you can select only one working board and one protection board.
	Clear Switching	Clears protection switching between the working and protection boards. During this operation, you can select only one record.

Shortcut Menu Description

Shortcut Menu	Description
Locked Switching	Locks switching. If you lock switching for the working board, services are locked to the working board and will not be switched to the protection board. If you lock switching for the protection board, the protection board does not provide protection. During this operation, you can select only one record.
Manual Switching	Switches services manually between the working and protection boards. During this operation, you can select only one working board and one protection board.
Forced Switching	Switches services forcibly between the working and protection boards. During this operation, you can select only one working board and one protection board.
Clear Switching	Clears protection switching between the working and protection boards. During this operation, you can select only one record.

Parameters

**Table 1** Protection Group
Field	Value	Description
Shelf ID	For example: 0	Indicates the subrack ID of a protection group.
Protection Group ID	For example: 1	Indicates the ID of a protection group.
Protection Type	For example: 2:12	Indicates the protection type.
Current Status	Completed, Uncompleted	Indicates the status of a protection group. If logical boards are installed in all the working and protection slots required by the cross-connect mode, the value is Completed. Otherwise, the value is Uncompleted.
WTR Time(s)	300 to 720 Default: 300	Indicates the wait to restore (WTR) time. M:N protection is a type of shared protection. Therefore, its reversion mode must be revertive. WTR time determines when to switch services back to the original working board after the board is detected normal. If the working board is restored, services will be switched back to it when the WTR time is due.

**Table 2** Slot Mapping Relationship
Field	Value	Description
Protection Unit	For example: 73-V1XCS	Indicates the slot ID and name of a working or protection board.
Type	Protection, Working	Indicates the board role.
Status	Normal, Faulty	Indicates the working status of a board. If the board is faulty, protection switching is needed.
Active Status	Actived, Unactived	Indicates the activation status of a board. Boards in the active state are being used.
Currently Responded Request	Switching Lockout, Forced Switching, Auto Switching, Manual Switching, WTR, None	Indicates the type of request that a board responds to.
Protected Unit	slot number-board name	Indicates the protected board. For an inactive working board, the value is the slot ID of the protection board. For an active protection board, the value is the slot ID of the working board.