IF 1+1 Protection

In this user interface, you can query the board protection group, create an IF 1+1 protection group, delete an IF protection group and modify its attributes.

Navigation Path

In the NE Explorer, choose Configuration > Link Configuration from the navigation tree. Click IF 1+1 Protection.

Shortcut Menu Description

Menu Item	Description
Browse Performance	Displays the performance browse window and you can query the current performance date and historical performance data.
Clear	Clears switching for the selected board.
Force to Protection	Forces the service to switch from the working board to the protection board. This switching is performed regardless of the protection board state, unless the protection board is satisfying a higher priority bridging request.
Force to Working	Forces services to switch from the protection board to the working board. This switching is performed regardless of the working board state, unless the working board is satisfying a higher priority bridging request.
Manual to Protection	Performs manual switching from the working board to the protection board. If the protection board is normal, the switching takes place. If the protection board fails or must satisfy a switching request of higher priority, the switching does not take place.
Manual to Working	Performs manual switching from the protection board to the working board. If the working board is normal, the switching takes place. If the working board fails or must satisfy a switching request of higher priority, the switching does not take place.
Lockout of Protection	The switching request for the board is denied, but the reversion of switching is allowed.
Query Switch Status	Queries the current protection switching status from the NE.

Parameter Description

**Table 1** Parameters for RTN 310, RTN 380 and RTN 905 (subrack type: III)
Parameter	Value	Description
Protection Group ID	1	Indicates the protection group ID. NOTE: Only one protection group can be created.
Service Protection Type	LAG Mode, Split Mode	Indicates the service protection mode of the NE. If this parameter is set to LAG Mode, a link aggregation group (LAG) is required, and one or two GE services can be protected. If this parameter is set to Split Mode, no LAG is required, and only one service can be protected.
Working Mode	HSB, SD, FD	Selects the working mode for the IF 1+1 protection group. In the 1+1 HSB protection mode, the equipment provides a 1+1 hot standby configuration for the IF board and ODU at the two ends of each hop of a microwave link to realize the protection. In the 1+1 FD protection mode, the system uses two channels that have a frequency spacing between them, to transmit and receive the same signal. The opposite end selects signals from the two received signals. With the 1+1 FD protection, the impact of the fading on signal transmission is reduced. In the 1+1 SD protection mode, the system uses two antennas that have a space distance between them, to receive the same signal. The equipment selects signals from the two received signals. With the 1+1 SD protection, the impact of the fading on signal transmission is reduced. The 1+1 FD protection mode and 1+1 SD protection mode are compatible with the 1+1 HSB switching function. Set this parameter according to the planning information.
Revertive Mode	Revertive, Non-Revertive Default: Revertive	Specifies whether to switch back to the original working service after removing the fault. Select Revertive to switch back to the working service, or select Non-Revertive not to switch back to the working service any longer. When this parameter is set to Revertive, the NE that is in the switching state releases the switching and enables the former working channel to return to the normal state some time after the former working channel is restored to normal. When this parameter is set to Non-Revertive, the NE that is in the switching state keeps the current state unchanged unless another switching occurs even though the former working channel is restored to normal.
WTR Time (s)	300 to 720 Default: 600	Sets the wait-to-restore time. Refer to the period of time starting when it is detected the working board returns to normal and ending when the working board is switched back after the protection switching. This parameter is valid only when Revertive Mode is set to Revertive. When the time after the former working channel is restored to normal reaches the set wait-to-restore (WTR) time, a revertive switching occurs. It is recommended that you use the default value.
Fiber Length(m)	1 to 300	Sets the fiber length. NOTE: In 1+1 protection, the delay varies with the fiber length. NEs in 1+1 protection can determine an appropriate offset based on the fiber length between them.
Enable Reverse Switching	Enabled, Disabled Default: Enabled	When both the main IF board and the standby IF board at the sink end report service alarms, they send the alarms to the source end by using the MWRDI overhead in the microwave frame. When this parameter at the source end is set to Enable and the reverse switching conditions are met, the IF 1+1 protection switching occurs at the source end. This parameter is valid only when Working Mode is set to HSB or SD. In 1+1 FD mode, this parameter is read-only and its default value is Disabled. It is recommended that you use the default value.
Device Active Ne	For example: NE(9-48)	Displays the active NE of a device.
Device Active Port	Slot-Board Name-Port	Queries the active port of a device.
NE Switching Status	Normal, Automatic Switching, Manual Switching, Forced Switching, Switching Lockout, Wait to Restore, RDI Switching, Unknown	Queries the switching status of an NE.
Channel Active Ne	For example: NE(9-48)	Displays active NE of a channel.
Channel Active Port	Slot-Board Name-Port, Unknown	Queries the active port of a channel.
Channel Switching Status	Normal, Forced Switching, Automatic Switching, Unknown	Queries the switching status of a channel.
Enable Switching upon ETH_LOS Alarm	Enabled, Disabled	Specifies whether to enable switching upon ETH_LOS alarms.
Unit	Working Board, Protection Board	Displays the working board and the protection board.
IF Port	Slot-Board Name-Port Name(Port Name)	Sets the port mapping relationships of channel protection group unit.
Service Port	Slot-Board Name-Port Name(Port Name)	Displays the service port of the working board or the protection board.
Working Status of Device	For example: Normal	Queries the working status of an NE.
Signal Status of Channel	For example: Normal	Queries the working status of a channel.

**Table 2** Parameters for other RTN NEs
Field	Value	Description
Protection Group ID	1, 2, 3	Displays the protection group ID.
Working Mode	HSB, SD, FD	Selects the working mode for the IF 1+1 protection group. In the 1+1 HSB protection mode, the equipment provides a 1+1 hot standby configuration for the IF board and ODU at the two ends of each hop of a microwave link to realize the protection. In the 1+1 FD protection mode, the system uses two channels that have a frequency spacing between them, to transmit and receive the same signal. The opposite end selects signals from the two received signals. With the 1+1 FD protection, the impact of the fading on signal transmission is reduced. In the 1+1 SD protection mode, the system uses two antennas that have a space distance between them, to receive the same signal. The equipment selects signals from the two received signals. With the 1+1 SD protection, the impact of the fading on signal transmission is reduced. The 1+1 FD protection mode and 1+1 SD protection mode are compatible with the 1+1 HSB switching function. Set this parameter according to the planning information.
Revertive Mode	Revertive, Non-Revertive Default: Revertive	Specifies whether to switch back to the original working service after removing the fault. Select Revertive to switch back to the working service, or select Non-Revertive not to switch back to the working service any longer. When this parameter is set to Revertive, the NE that is in the switching state releases the switching and enables the former working channel to return to the normal state some time after the former working channel is restored to normal. When this parameter is set to Non-Revertive, the NE that is in the switching state keeps the current state unchanged unless another switching occurs even though the former working channel is restored to normal.
WTR Time (s)	300 to 720 Default: 600	Sets the wait-to-restore time. Refer to the period of time starting when it is detected the working board returns to normal and ending when the working board is switched back after the protection switching. This parameter is valid only when Revertive Mode is set to Revertive. When the time after the former working channel is restored to normal reaches the set wait-to-restore (WTR) time, a revertive switching occurs. It is recommended that you use the default value.
Enable Reverse Switching	Enabled, Disabled Default: Enabled	When both the main IF board and the standby IF board at the sink end report service alarms, they send the alarms to the source end by using the MWRDI overhead in the microwave frame. When this parameter at the source end is set to Enable and the reverse switching conditions are met, the IF 1+1 protection switching occurs at the source end. This parameter is valid only when Working Mode is set to HSB or SD. In 1+1 FD mode, this parameter is read-only and its default value is Disabled. It is recommended that you use the default value.
NE Switching Status	Normal, Automatic Switching, Manual Switching, Forced Switching, Switching Lockout, Wait to Restore, RDI Switching, Unknown	Queries the switching status of an NE.
Channel Switching Status	Normal, Forced Switching, Automatic Switching, Unknown	Queries the switching status of a channel.
Device Active Port	Slot-Board Name-Port, Unknown	Queries the active port of an NE.
Channel Active Port	Slot-Board Name-Port, Unknown	Queries the active port of a channel.
Enable Switching upon ETH_LOS Alarm	Enabled, Disabled	Specifies whether to enable switching upon ETH_LOS alarms.
Unit	Working Board, Protection Board	Displays the working board and the protection board.
IF Port	Slot-Board Name-Port Name(Port Name)	Sets the port mapping relationships of channel protection group unit.
Service Port	Slot-Board Name-Port Name(Port Name)	Displays the service port of the working board or the protection board.
Slot Mapping Settings	Slot-Board Name-Port Name(Port Name)	Sets the port mapping relationships of board protection group unit.
Working Status of Device	For example: Normal	Queries the working status of an NE.
Signal Status of Channel	For example: Normal	Queries the working status of a channel.
Working Board	Slot-Board Name	Set the working board for a protection group.
Protection Board	Slot-Board Name	Set the protection board for a protection group.
Alarm Report Mode	Only board alarms, Only protection group alarms, Protection group and board alarms	Sets the alarm report mode.
Anti-Jitter Time	0 to 600	Sets the anti-jitter time. NOTE: For RTN 620 NEs, when Anti-Jitter Time is modified to smaller than 5s, Anti-Jitter Time automatically changes to be 5s.