Huawei HG8245T Router Manual PDF (Setup & Configuration Guide)

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l

Delete the performance statistics of an ETH port.

In GPON mode, run the

clear statistics ont-eth

command to delete the performance

statistics of an ETH port.

----End

Example

To query the performance statistics of ETH port 1 on ONT 1 that is connected to GPON port

0/2/0, do as follows:

huawei(config-if-gpon-0/2)#

display statistics ont-eth 0 1 ont-port 1

-----------------------------------------------------------------------

Received frames

:

98 100%

Received unicast frames

:

0

0%

Received multicast frames

:

0

0%

Received broadcast frames

:

98 100%

Received 64-byte frames

:

0

0%

Received 65~127-byte frames

:

87

89%

Received 128~255-byte frames

:

6

6%

Received 256~511-byte frames

:

5

5%

Received 512~1023-byte frames

:

0

0%

Received 1024~1518-byte frames

:

0

0%

Received undersize frames

:

0

0%

Received oversize frames

:

0

0%

Received fragments

:

0

Received jabbers

:

0

Received FCS error frames

:

0

Discard frames

:

0

Received alignment error frames

:

0

MAC sub-layer received error frames :

0

PPPOE filtered frames

:

0

Buffer overflows on receive

:

0

Received PAUSE frames

:

0

Received right bytes

:

11119

Received bad bytes

:

0

Sent frames

:

0 100%

Sent unicast frames

:

0

0%

Sent multicast frames

:

0

0%

Sent broadcast frames

:

0

0%

Sent delay frames

:

0

Sent MTU exceeded discard frames

:

0

Carrier sense error frames

:

0

SQE test error messages

:

0

Sent single collision frames

:

0

Sent multiple collision frames

:

0

Sent excessive collision frames

:

0

Late collision frames

:

0

MAC sub-layer sent error frames

:

0

Buffer overflows on transmit

:

0

Sent PAUSE frames

:

0

Sent right bytes

:

0

Sent bad bytes

:

0

Up traffic (kbps)

:

0

Down traffic (kbps)

:

0

-----------------------------------------------------------------------

To delete the performance statistics of ETH port 1 on ONT 1 that is connected to GPON port

0/2/0, do as follows:

huawei(config-if-gpon-0/2)#

clear statistics ont-eth 0 1 ont-port 1

EchoLife HG8010/HG8240B/HG8245T/HG8247T GPON

Terminal

Service Manual

5 Maintenance and Troubleshooting

Issue 01 (2011-10-18)

Huawei Proprietary and Confidential

348

Page 357 / 429

5.7 Troubleshooting the FTTx GPON Service

This topic describes how to troubleshoot common faults in Internet access, multicast (IPTV),

and voice (VoIP) services in the GPON access mode in FTTx scenarios.

5.7.1 ONU Abnormal State

This topic describes how to troubleshoot common faults in ONU abnormal state, including fail

to register an ONU, fail to auto discover an ONU and ONU frequently get offline. ONU includes

ONT and MDU.

ONU Registration Failure

The ONU registration failure is a fault in which the values of

Run state

,

Config state

, and

Match state

of an ONU are abnormal as queried by running the

display ont info

command on

the OLT.

l

The ONU running status refers to the current running status of the ONU. It indicates whether

the ONU is online and whether the ONU can carry service. The ONU status is classified

into three types: ONU Run state, ONU Config state, and ONU Match state.

–

If the ONU running status is offline, the OLT cannot issue any command to the ONU.

–

If the ONU running status is online. In this case, whether the service can be forwarded

is determined by the ONU configuration status.

l

The ONU configuration status indicates whether the configuration restoration is enabled

and whether the configuration restoration is complete. The ONU configuration status has

the following states: initial, normal, configuring (config), and configuration failure (failed).

When an ONU goes online, the ONU is in the configuration restoration stage.

–

The first status is initial. Soon the initial is complete and the ONU enters the config

state.

–

In the config state, the ONU capability and configuration data are restored. The duration

of the config state is determined by the amount of the data configured on the ONU.

–

If the configuration restoration is successful, the ONU transitions from the config state

to the normal state.

–

If the configuration restoration fails, the ONU transits from the config state to the failed

state and the service cannot be carried forward.

l

The ONU matching status indicates whether the actual ONU capability is the same as the

service profile bound to the ONU. The status includes: initial, mismatch, and match. To

some extent, the matching status is determined by the ONU running status and configuration

status.

–

The matching status of the ONU can be queried only when the ONU running status is

online and the configuration status is normal. The matching status is match when the

hardware capability is the same as the ONU service profile bound with the ONU.

Otherwise, the status is mismatch.

–

In other configuration states, the matching status is initial.

–

The ONU matching status does not affect the normal forwarding of the service flow,

and only indicates whether the actual ONU capability is the same as the service profile

bound to the ONU.

EchoLife HG8010/HG8240B/HG8245T/HG8247T GPON

Terminal

Service Manual

5 Maintenance and Troubleshooting

Issue 01 (2011-10-18)

Huawei Proprietary and Confidential

349

Page 358 / 429

?.1. Failure to Go Online of an ONT

An ONU connected to a GPON port of an OLT fails to go online normally, but the queried

Run

state

of the ONU is displayed as

offline

by running the

display ont info

command on the OLT.

Location Method

NOTE

Going online refers to a process that after being powered on, an ONU registers with an OLT and sets up a

management channel with the OLT. An ONU can be managed by the OLT and be configured with services

only after going online.

When an ONU fails to go online, locate the fault based on the following fault symptoms and

possible causes.

Fault

Scope

Symptom

Possible Cause

OLT

A single ONU or some

ONUs connected to an

OLT fail to go online.

l

The SN or password configured on the OLT is

different from the actual SN or password of the

ONU; hence, the ONU fails to pass

authentication and go online.

l

The actual distance between the ONU and OLT

exceeds the ranging compensation distance

configured on the OLT.

l

The OLT deactivates the ONU.

All the ONUs connected to

a PON port of an OLT fail

to go online.

l

The laser on the PON port is disabled.

l

The PON port is faulty.

All the ONUs connected to

a board of an OLT fail to go

online.

l

The board or the slot is faulty.

ODN

NOTE

ODN

failures

are

generally

caused by

large

reflection

and

attenuatio

n caused

by

improper

optical

compone

nts,

design, or

constructi

on.

A single ONU or some

ONUs connected to an

OLT fail to go online.

l

The branch fiber is bent excessively.

l

The branch fiber connector is not clean.

l

Different types of branch fiber connectors are

interconnected.

l

The multi-mode optical fiber is used as the

branch fiber.

l

The ODN is not properly planned. For

example, the split ratio, network coverage and

attenuation difference are not planned within

the proper ranges.

l

The optical attenuation of the optical path is

excessively small.

l

A branch fiber break occurs.

l

The optical splitter is faulty or the connectors

on the optical splitter are not clean.

EchoLife HG8010/HG8240B/HG8245T/HG8247T GPON

Terminal

Service Manual

5 Maintenance and Troubleshooting

Issue 01 (2011-10-18)

Huawei Proprietary and Confidential

350

Page 359 / 429

Fault

Scope

Symptom

Possible Cause

All the ONUs connected to

a PON port of an OLT fail

to go online.

l

The backbone fiber is bent excessively.

l

The backbone fiber connector is not clean.

l

Different types of backbone fiber connectors

are interconnected.

l

The multi-mode optical fiber is used as the

backbone fiber.

l

A backbone fiber break occurs.

l

The optical splitter is faulty or the connectors

on the optical splitter are not clean.

ONU

A single ONU or some

ONUs connected to an

OLT fail to go online.

l

The ONU is not powered on.

l

The information (including SN and password)

for ONU authentication conflicts; hence, the

later power-on ONU fails to go online.

l

A rogue ONU (such as a continuous-mode

ONU) exists on the network and affects other

ONUs.

l

The ONU hardware is faulty.

l

The optical module of the ONU is faulty.

l

The Patch cord of the ONU is broken or bent

excessively.

CAUTION

To facilitate fault report, save the results of the following steps.

The parameters of the optical module in this topic comply with Class B+. Note that such

parameters are slightly different from the parameters in Class C.

Procedure

Step 1

When the queried

Run state

of the ONU is displayed as

offline

, check whether the OLT

generates the following alarms. If such alarms are generated, clear them and check whether the

fault is rectified. If the fault persists, proceed to

Step 2

.

The following alarms may be generated:

l

0x2e305015 The authentication information of the ONTs conflicts

l

0x2e314021 There are illegal incursionary rogue ONTs under the port

l

0x2e314022 The ONT is rogue ONT

l

0x2e11a00b The dying-gasp of GPON ONTi (DGi) is generated

l

0x2e11a001 The feed fiber is broken or OLT can not receive any expected optical signals

(LOS)

EchoLife HG8010/HG8240B/HG8245T/HG8247T GPON

Terminal

Service Manual

5 Maintenance and Troubleshooting

Issue 01 (2011-10-18)

Huawei Proprietary and Confidential

351

Page 360 / 429

l

0x2e112007 The distribute fiber is broken or OLT can not receive expected optical

signals from GPON ONT(LOSi)

l

0x2e11a00a The loss of acknowledgement PLOAM message with ONTi (LOAi) occurs

Step 2

Check for the possible causes on the OLT and troubleshoot the faults accordingly. If the ONU

still fails to go online after that, proceed to

Step 3

.

Possible Cause

Judgment Criterion

Troubleshooting Method

The SN configured on

the OLT is different from

the actual SN of the

ONU; hence, the ONU

fails to pass

authentication and to go

online.

Run the

display ont info

command to query the ONU

information. It is found that the

SN in the result is different

from the actual ONU SN.

Run the

ont add

command to

re-add an ONU and specify the

correct ONU SN and password.

NOTE

The ONU with a different SN is

regarded as a new one and is

founded by the OLT.

The actual distance

between the ONU and

OLT exceeds the ranging

compensation distance

configured on the OLT.

Run the

display port info

command to query the

minimum logical reach (

Min

distance

) and maximum

logical reach (

Max distance

)

configured for the GPON port.

It is found that the actual

distance between the ONU and

OLT exceeds the ranging

compensation distance.

For example, the actual length

of the optical fiber between the

ONU and OLT is about 25 km,

which exceeds the ranging

compensation distance of 0-20

km.

Run the

port range

command

to adjust the minimum logical

reach and maximum logical

reach so that the actual distance

between the ONU and OLT is

within the ranging

compensation distance.

NOTE

l

By default, the ranging

compensation distance of a

GPON port is from 0 km to 20

km.

l

According to Class B+, the

maximum logical reach of a

GPON port must not exceed

60 km, and the difference

between the minimum logical

reach and maximum logical

reach must not exceed 20 km.

The OLT deactivates the

ONU.

Run the

display ont info

command to query the ONU

information. It is found that

Control flag

is displayed as

deactive

.

Run the

ont activate

command

to activate an ONU.

NOTE

When an ONU is activated, its

optical module only receives

optical signals but does not

transmit optical signals.

The laser on the PON

port is disabled.

Run the

display port info

command to query the

information about the PON

port. It is found that

Laser

switch

is in the

Off

state.

Run the

port laser-switch

command to enable the laser on

the PON port.

NOTE

By default, the laser on a GPON

port is enabled.

EchoLife HG8010/HG8240B/HG8245T/HG8247T GPON

Terminal

Service Manual

5 Maintenance and Troubleshooting

Issue 01 (2011-10-18)

Huawei Proprietary and Confidential

352

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