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display board 0/slot check all the ONUs that belong toone service card
display ont info portid all check all the ONUs that belong toone PON interface
display ont info portid ontid check the detailed information ofone specified ONU
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The ONT status falls into three types: ONT running status, ONT configuration status and ONT matching
status.
The ONT running status refers to the ONT service condition. It indicates whether the ONT is
online and whether the ONT carries the service.
If the ONT running status is DOWN, the ONT does not support the ONT version
query, ONT FE statistics query or GEM port statistics query. The ONT cannot carry
service either.
If the ONT running status is UP, the ONT is online and the three yellow LEDs on the
ONT are on. In this case, whether the service can be forwarded is decided by the
ONT configuration status.
The ONT configuration status indicates whether the configuration restoration is enabled and
whether the configuration restoration is complete. The ONT configuration status has these
states: initial state (initial), normal state (normal), no configuration restoration (no resume),
configuring (config) and configuration failure (failed).
When the actual ONT capability is the same as the configuration of the capability set profile,
the ONT is in the configuration restoration stage.
The first status is "initial". Soon the "initial" ends and the ONT enters the "config" state.
The "config" stage mainly restores the ONT capability data and configuration data. The
duration of the "config" state is decided by the data volume configured on the ONT.
If the configuration restoration succeeds, the ONT transits from the "config" state
to the "normal" state.
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If the configuration restoration fails, the ONT transits from the "config" state to the
"failed" state and the service cannot be forwarded.
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When the actual ONT capability is different from the configuration of the
capability set profile, the ONT is processed based on the ONT
configuration restoration policy that is configured by the ont resume
resource command.
If the restoration policy is enabled, only the configuration allowedby the ONT actual capability is delivered.
If the restoration policy is disabled, the ONT configuration status
is "no resume" and the service cannot be forwarded.
The ONT matching status indicates whether the ONT actual capability is
the same as the capability set profile bound to the ONT. The status
include: initial, mismatch and match. To some extent, the matching status
is decided by the ONT running status and configuration status.
Only when the ONT running status is up, the configuration status
is normal, and the hardware capability is the same as the ONT
capability set profile bound with the ONT, the matching status is
match.
Otherwise, the status is mismatch. In all other configuration states,
the matching status is initial.
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The ONT matching status does not affect the normal forwarding of the
service flow, and only indicates whether the ONT actual capability is the
same as the capability set profile bound to the ONT.
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Failure to Automatically Find an ONU
The ONU auto-find failure is a fault in which an OLT fails to automatically find an ONU after
the ONU is powered on.
ONU Registration Failure
The ONU registration failure is a fault in which the values of Run state, Config state, andMatch state of an ONU are abnormal as queried by running the display ont info command on
the OLT.
ONU Frequently Goes Online and Offline
ONUs connected to a GPON port frequently goes online and offline and thus the OLT reports
a large number of ONU LOS alarms and relevant recovery alarms.
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1.When the ONU fails to register, check whether the following alarms are generated:
0x2e314021 There are illegal incursionary rogue ONTs under the port
0x2e314022 The ONT is rogue ONT
0x2e11a00b The dying-gasp of ONTi DGi) is generated
0x2e112007 The distribute fiber is broken or OLT can not receive expected optical signals from GPON
ONT LOSi)
0x2e11a001 The feed fiber is broken or OLT can not receive any expected optical signals LOS)
0x2e21a102 The GPON ONT configuration recovery fails
2.Check whether the ONU is configured.
3.In the GPON mode of the OLT, run the display ont info command to query the ONU status.
If the Control flag of the ONU is deactivated, run the ont activate command to activate the ONU
4.Run the display ont capability command to query the actual capability of the ONU. Bind the
capability set profile matching the ONU capability according to the data plan or modify the ONU
capability set profile
5.Check whether 0x2e305015 The authentication information of the ONTs conflicts is generated on theOLT。
6.Check whether there are a lot of ONUs are connected to a splitter.
7.Run the display port info command to query the maximum registered distance of the ONU
connected to a GPON port.
If the actual distance from the OLT to the ONU is beyond the maximum registered distance
preset on the OLT, run the port range command to adjust the maximum distance. This makes
the actual distance shorter than the maximum registered distance.
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1.Check whether the following alarm is generated in the system.
0x2e11a001 The feed fiber is broken or OLT can not receive any expected optical
signals LOS)
2.Run the display port info command to query the port status.
If the "Laser switch" is "Off", run the undo shutdown command to enable the optical
transceiver. After the optical transceiver is enabled, if the "Laser switch" is still in the
"Off" state, replace the optical transceiver.
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OLT:
1. The ONU auto-find function is disabled on the PON port.
Run the port ont-auto-find command to enable the auto-find function of the PON port.
2. The actual distance between the ONU and OLT exceeds the ranging compensation distanceconfigured on the OLT.
Run the port range command to adjust the minimum logical reach and maximum logical reach sothat the actual distance between the ONU and OLT is within the ranging compensation distance.
3. The laser on the PON port is disabled.
Replace the optical transceiver of the PON port or replace the board.
4. The board is faulty.
Replace the board.
ODN:
1. The optical fiber connector is not clean.
Clean the optical fiber connector.
2. The optical fiber is bent excessively.
Route and bundle the optical fiber in a proper manner.
3. The optical fiber is not firmly connected or different types of optical fiber connectors areinterconnected.
If the optical fiber is not firmly connected, reconnect the optical fiber firmly.
If different types of optical fiber connectors are interconnected, replace the incompatible connectorwith a compatible one or replace
relevant devices, such as the optical splitter.
4. The multi-mode optical fiber is used as the backbone or branch optical fiber.
Replace the multi-mode optical fiber with the single-mode optical fiber.
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5. The optical attenuation of the optical path is excessively small.
Add an optical attenuator on the optical path between the OLT and ONU.
6. The ODN is not properly planned.
Optimize the ODN to meet Huawei's ODN planning requirements and protocol
requirements.
7. The optical splitter is faulty or the connectors on the optical splitter are not clean.
Replace the faulty optical splitter or clean the connectors on the optical splitter.
8. A backbone fiber break occurs.
Reconnect the backbone optical fiber.
9. A branch fiber break occurs.
Reconnect the branch optical fiber.
ONU:
1. The ONU is not powered on. Restore the power supply of the ONU.
2. The ONU hardware is faulty.
Replace the faulty ONU or the optical transceiver of the ONU.
3. The optical transceiver of the ONU is abnormal. For example, the transmit optical power of
the optical transceiver is excessively small or its receiver sensitivity is low.
Replace the faulty ONU or the optical transceiver of the ONU.
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OLT:
1. The PON port is faulty.
Replace the optical transceiver of the PON port or replace the board.
2. The board is faulty.
Replace the board.
ODN:
1. The optical fiber connector is not clean.
Clean the optical fiber connector.
2. The optical fiber is bent excessively.
Route and bundle the optical fiber in a proper manner.
3. The optical fiber is not firmly connected or different types of optical fiber connectors are
interconnected. If the optical fiber is not firmly connected, reconnect the optical fiber firmly.
If different types of optical fiber connectors are interconnected, replace the incompatible
connector with a compatible one or replace relevant devices, such as the optical splitter.
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4. The multi-mode optical fiber is used as the backbone or branch optical fiber.
Replace the multi-mode optical fiber with the single-mode optical fiber.
5. The optical splitter is faulty or the connectors on the optical splitter are not clean.
Replace the faulty optical splitter or clean the connectors on the optical splitter.
6. The ODN is not properly planned.
Optimize the ODN to meet Huawei's ODN planning requirements and protocol
requirements.
ONU:
1. A rogue ONU (such as a continuous-mode ONU) exists on the network and affects other
ONUs.
Replace the rogue ONU with a normal one.
2.The ONU is restarted repeatedly.
Replace the ONU or ensure that the power supply of the ONU is normal.
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A1:“Match status” indicate the matching condition of NOT’s real hardware capabilityand the configuration in service profile that bound to ONT. When the statusis“mismatch”, we can run command “display ont capability”to check the realcapability, and then modify the service profile to make it identical with real capability.
A2. Optical module fault
Feed fiber or the splitter fault
PON interface disable the auto-find function
The permission accessing distance configuration incorrect
Other causes
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