Networking overview: The terminal ONU
MA5821 is connected to two different OLTs through an optical splitter, and the
OLTs are connected to two AC6605s through one 1*10GE optical port on each OLT.
The AC6605s are configured with VRRP hot standby networking. Type B protection
groups are configured on the two OLTs. The split ratio of the optical splitter
The following figure shows the networking
1: Run the display ont-auto-find command on the PON port of the OLT. The ONU cannot be automatically discovered.
1: Use a hand-held optical power meter to
test the receive optical power on the MA5821. The receive optical power is
about –8.0 dBm.
2: Query the protection group status of the
PON port on the OLT. The handshake status of the protection group is fault.
3: Remove the pigtail of the corresponding
PON port on the OLT, and run the display ont-auto-find command on the
PON port of the OLT. The ONU can be discovered. After the ONU is discovered,
configure the ONU to go online on the host. The standby device is not
When the ONU goes online, the VRRP hot
backup status between the two AC6605s is not configured. As a result, the OLT
protection group fails to be set up.
The two OLTs transmit optical signals at
the same time. As a result, the receive optical power of the ONU is too large
and the ONU cannot be automatically detected on the OLT.
Disconnect the link of the standby OLT and
configure the ONU on the active OLT.
After the configuration of the upper-layer
device is complete, check the status of the protection group on the active and
standby OLTs. Then connect the link of the standby device and configure the