Dear friend,
If the EA5821 is not the H825XCWA control board, you can also create a VLAN bridge to implement Layer 2 communication between ports.
The command is the same as that configured on the OLT.
If the EA5821 is an H825XCWA control board, you need to configure the ports that need to communicate with each other.
For example, eth1 and eth3 must be able to communicate with each other.
huawei(config)#undo isolate port 0/0/1
huawei(config)#undo isolate port 0/0/3
thanks