How to configure GPON Type B Single-Homing Protection?

This section describes how to configure GPON type B single-homing protection on an OLT to implement GPON port 1+1 redundancy backup, which ensures that services are not interrupted if a fault occurs on the OLT's PON port or backbone fiber.

Precautions
After GPON type B single-homing protection is configured, the service configurations on an Huawei optical network unit (ONU) remain unchanged and data is transmitted or received over the primary GPON port.
The GPON type B protection function is incompatible with the GPON type C protection functions. Only one of the two functions can be enabled on a network.

Procedure
Step 1 Run the protect-group command to create a protection group for GPON access ports.
Step 2 Run the protect-group member command to add a protection member to the protection group.
Step 3 Run the protect-group enable command to enable the protection group.
A created protection group is disabled by default.
Step 4 Run the display protect-group command to query the information about the protection group and all the members in the protection group.

Result
After the configuration, the primary GPON port on Huawei OLT works in active mode and the secondary GPON port works in standby mode.
An automatic switching can be triggered by any of the following conditions:
OLT GPON port failureuyi
Fractures of optical fibers
Quality deterioration of lines
For a type-B inter-board protection group, if an the customer needs to change the board that houses the active PON port, trigger type-B protection switching to activate the standby PON port, and then migrate the to-be-migrated PON port to the target board.

Example
The following configurations are used as an example to configure GPON type B single-homing protection on the OLT:
Protection group members: 0/2/0 and 0/2/1 (on the same GPON service board)
Primary port: 0/2/0
Secondary port: 0/2/1

The following configurations are used as an example to configure type B single-homing protection on the OLT:
Protection group members: 0/3/1 and 0/4/1 (on different GPON service boards)
Primary port: 0/3/1
Secondary port: 0/4/1