How to Configure the Fast Path Mode for the VDSL Line Profile of an Huawei DSLAM MA5616?

Our company just purchased an Huawei DSLAM MA5616 from oversea, how to configure the fast path mode for the VDSL line profile of an MA5616?

The mode of a VDSL line profile, interleaving path mode or fast path mode, is determined based on the values of the interleaving delay and impulse noise protection (INP). Therefore, configure the following parameters to determine the fast path mode:

• Set Maximum interleaving delay downstream/upstream to 0.
• Set Maximum INP on downstream/upstream direction to 1, which indicates that no protection is enabled.
• Set Minimum rtxratio/rsoverhead in downstream/upstream to 0.

The commands are as follows:

What is the All-in-one Highlight of Huawei OLT MA5600T?

The integrated fiber-copper access platform and the access-aggregation integration capability of Huawei MA5600T/MA5603T/MA5608T effectively ensure the smooth evolution of the access network.

Huawei MA5600T/MA5603T/MA5608T supports integrated fiber-copper access and access-aggregation integration

MA5600T/MA5603T/MA5608T of the all in one platform 

Fiber-Copper Integration

The MA5600T/MA5603T/MA5608T enables optical fibers and copper lines to be integrated in one platform, which ensures that the access network can smoothly evolve from copper line access to optical fiber access.

• Optical fiber access: The MA5600T/MA5603T/MA5608T supports GPON, 10G GPON, and P2P optical fiber access, satisfying the requirements of the FTTH, FTTB, FTTC, FTTO, FTTM, and FTTW scenarios.
• Copper line access: The MA5600T/MA5603T/MA5608T supports ADSL2+ (compatible with ADSL), VDSL2 (compatible with ADSL2+), SHDSL, and POTS voice services. The MA5600T/MA5603T/MA5608T supports multiple copper line access modes and makes full use of existing copper line resources to provide users with rich and flexible network services. In addition, the MA5600T/MA5603T/MA5608T can function as a DLSAM to be used in copper access only, or as an MSAN to be used in integrated fiber-copper access.

Access-Aggregation Integration

The MA5600T/MA5603T can implement FTTH/DSLAM access and FTTB/FTTC/DSLAM Ethernet aggregation in the same subrack to provide a unified traffic aggregation point on the FTTH/FTTC/FTTB/FTTD network, thereby achieving aggregation of different network construction modes, eliminating the need to construct an independent access-aggregation network layer, and simplifying the network architecture.

• The MA5600T supports a maximum non-aggregation forwarding capability of 40 Gbit/s x 16 GE.
• The MA5600T and MA5603T support the 48-port high-density aggregation board and provide access for a maximum of 768 GE ports.
• The OLT supports Layer 3 functions and can be used as an aggregation edge device. It possesses powerful Layer 3 service processing capabilities, such as 40G switching capability and 60 Mpps Layer 3 forwarding capability in the 8 x 10 GE upstream load-sharing mode. With these capabilities, the OLT can:
  • Reduce upper-layer service traffic and shorten network transmission delay. Specifically, the OLT can perform Layer 3 switching for local traffic, thereby lowering the traffic pressure of the upper-layer network and pressure of network traffic expansion.
  • Simplify the network architecture. Specifically, Layer 2 aggregation switches do not need to be deployed, thereby streamlining the network layers.
  • Improve network security. Specifically, the upper network does not learn the user-side MAC addresses, thereby eliminating the risks of MAC spoofing and broadcast storms.
• The MA5600T and MA5603T support the mature all-service MPLS solution.
• Huawei MA5600T and MA5603T support service transmission over ATM PWE3, TDM PWE3, ETH PWE3, VPLS, and L2VPN.
• The MA5600T and MA5603T feature high service performance. Specifically, they support quick E2E service protection (service switching time: ≤ 200 ms).
• The MA5600T and MA5603T do not have limitations on service authentication and terminal VLAN planning, simplifying network design and maintenance.

Huawei DSLAM MA5616 Power Distribution Principle and Working Principles

Power Distribution Principle

Huawei MA5616 can be powered by a DC or AC power source through a DC or AC power board. The power board outputs -48 V DC, +3.3 V DC, and +12 V DC power to the backplane. Then the backplane provides the -48 V DC and +3.3 V DC power for the service board and control board, and provides the +12 V DC power for the fan monitoring board.

Power distribution principle of the MA5616 chassis(DC-powered H831PDIA /H832PDIA /H832PDVA/ H832PDVAA) 

Power distribution principle of the MA5616 chassis (AC-powered by H831PAIA/H831PAIC) 

Power distribution principle of the MA5616 chassis (AC-powered with power backup by H831PAIB) 

Working Principles

Huawei MA5616 supports GPON, 10G GPON or GE upstream CCUE transmission by using its control board and provides broadband and narrowband access services by using different service boards.

Working principles of the MA5616 chassis 

The working principles of Huawei DSLAM MA5616 chassis are as follows:

• The control board transmits services upstream and subtends device through subboards and manages service boards.
• The power board outputs DC power to the backplane and then the backplane transmits the power to the fan tray, service boards, and control board.
• The broadband or narrowband service board is connected to a user-side device by using a subscriber cable, and then the control board puts the user-side device through to the IP network. In this way, broadband or narrowband access service is provisioned to the user-side device.
• The fan monitoring board monitors the fan tray and transmits the monitoring signal to the control board through the backplane.

Do you know Huawei small-size DSLAM MA5616 and the Highlights? (1)

Huawei DSLAM SmartAX MA5616 Multi-service Access Module (MA5616 for short) is a 2-U high and 19-inch wide board-inserted device. It provides four service slots for flexible board configurations.

The MA5616 applies in fiber to the building (FTTB) and fiber to the curb (FTTC) scenarios. It can also function as a mini-digital subscriber line access multiplexer (DSLAM) or multiservice access node (MSAN). The MA5616 can be installed in corridors or cabinets (indoor or outdoor).

Each MA5616 provides user-to-network interfaces (UNIs), such as ADSL2+, VDSL2, SHDSL, POTS, FE, P2P, ISDN, or combo ports, and two network-to-network interfaces (NNIs) that support autonegotiation among GPON, EPON

Product Display

The following figure shows the appearance of the MA5616 equipped with a CCUE control board and PAIC power board.

CCUE control board

Hardware Structure

Commissioning serial port/Environment monitoring port

For the CON port: supports local and remote maintenance, which allows users to configure the MA5616 using software, such as HyperTerminal, through CLI. The default baud rate is 9600 bit/s.

For the ESC port: connects to an environment monitoring unit (EMU), which sends monitored environment monitoring parameters to the MA5616.

Uplink optical port

Supports auto-negotiation among GPON, EPON, and GE. Provides GPON, EPON, and GE upstream transmission or GE cascading. When this uplink optical port is used as a GE port, it is an alternative to the GE electrical (RJ45) port.

Maintenance network port

A 100M Base-T commissioning network port, which is a front-access-cabled FE port and supports 100 Mbit/s full-duplex in auto-negotiation mode.

Clock port

Outputs 2 MHz clock pulse signals.

Environment parameter monitoring port

Can be connected to a sensor to monitor environment parameters.

GE electrical port

Supports 1000 Mbit/s full-duplex upstream transmission or cascading in auto-negotiation mode. It is an alternative to the uplink optical (SFP) port.

Do you know Huawei small-size DSLAM MA5616 and the Highlights? (2)

Huawei MA5616 Highlights

High-Speed Vectoring
The MA5616 supports vectoring, which is used to increase VDSL2 line rates. With this technology, users can access the Internet at a higher rate and experience more and better VDSL2 services.

Crosstalk cancellation in the downstream direction

Crosstalk cancellation in the upstream direction

IPv6

 The IPv6 feature relieves IP address shortages and is simple to deploy, facilitating smooth service migration from IPv4 networks to IPv6 networks. In addition, IPv6 networks are compatible with IPv4 networks.

Combo Board Design

The combo board design reduces wiring space on the main distribution frame (MDF) and improves deployment efficiency, thereby reducing carriers' construction and maintenance costs

Comprehensive QoS

• User port-based rate limitation in both downstream and upstream directions
• Traffic shaping for port-level queue groups
• Weighted random early detection (WRED) profile and the binding of a WRED profile to a queue
• Access control list (ACL)-based priority marking
• Mapping downstream or upstream services to different priority queues for scheduling based on priorities
• Three scheduling modes: priority queuing (PQ), weighted round robin (WRR), and PQ+WRR

High Efficiency Maintenance and Management

Is plug and play and supports service pre-deployment.

MA 5616 Supports remote fault locating, troubleshooting, and batch upgrades.

Carrier-Class Reliability Design

• Complies with carrier-class reliability specifications.
• Passes the electrostatic discharge (ESD) test.
• Provides surge protection and anti-interference functions.
• Protects user ports and power ports.
• Uses an anticorrosion design and fewer lines routed across the surface of a board to achieve a proper heat dissipation effect (producing a temperature difference to prevent condensation).

Energy Conservation

The power-conservation design ensures the lowest power consumption and noises and the optimal heat dissipation, thereby reducing environment pollution and operation costs.

Do you know the features of Huawei DSLAM MA5616?

10G GPON Upstream Transmission

• 10G GPON provides a higher bandwidth to meet service requirements.
• The 10G GPON transmission complies with ITU-T Recommendation G.987 and ITU-T Recommendation G.988, and provides asymmetric transmission rates of 2.5 Gbit/s in the upstream direction and 10 Gbit/s in the downstream direction.
• 10G GPON networks can coexist with the current GPON networks to fully use the existing optical distribution network (ODN) resources.

Vectoring Broadband Service Speedup

Huawei MA5616 supports the vectoring technology to increase the very-high-speed digital subscriber line 2 (VDSL2) line rate.

VDSL2 is a mainstream mode for last kilometer access and shows increasing importance in bandwidth usage. VDSL2 uses high frequency bands and therefore the inter-line crosstalk has an evident impact on line quality. The bandwidth in multi-pair access scenario is much lower than the bandwidth in single-pair access scenario. Crosstalk becomes a major factor affecting the VDSL2 performance.

The MA5616 supports the vectoring technology, which uses vectoring groups to jointly transmit signals in the downstream direction and receive signals in the upstream direction of a VDSL2 line. This function of the MA5616 helps cancel the far-end crosstalk (FEXT) and improve VDSL2 line performance.

The vectoring function brings the following values for carriers:

• Increases the bandwidth over a single cable within 500 m by 50% to 90%, reaching 95% of the theoretical value (without crosstalk).
• After rate increasing, carriers can provide higher rates and more types of services for users, such as high-definition video.

NOTE:

Only when the system uses the CCUE control board, the MA5616 supports vectoring broadband service speedup.

Flexible Configurations

The MA5616 supports concurrent working of multiple types of service boards. Numbers of various ports are configured flexibly according to actual requirements, increasing the loading rate and meeting diversified customer demands. For details about the flexible configuration supported by the MA5616

Combo Boards and P2P Board

The MA5616 has a combo board design for supporting a high subscriber density. Combo boards save carriers' construction expenditure, require less deployment space, wiring workload, and time occupancy of the main distribution frame (MDF). Briefly, combo boards reduce carriers' maintenance costs.

• The CALE board has a 32-port built-in splitter and supports service access of 32 asymmetric digital subscriber line 2 plus ADSL2+ ports and 32 plain old telephone service (POTS) ports.
• The CVLC board has a 32-port built-in splitter and supports service access of 32 VDSL2 ports and 32 POTS ports.

The MA5616 provides the following point-to-point (P2P) boards to meet the requirements of P2P access for enterprises and VIP users.

• The EIUD board provides four GE (optical or electrical) ports and four FE optical ports.

Various Services

• Supports Internet Group Management Protocol (IGMP) v2 and v3 to provide IPTV, high definition TV, and video conference services.
• Supports basic voice services such as call, fax, and modem services, and supplementary voice services such as three-way calling, call waiting, call transfer, calling line identification presentation, and calling number restriction services.

IPv6

• Supports IPv6. Compared with IPv4, IPv6 features simplified packet header format, sufficient IP addresses, hierarchical IP address structure, flexible extension header, and enhanced neighbor discovery mechanism.
• Supports IPv6 address management and allocation, IPv6 routing, quality of service (QoS) and security, Layer 2 transparent transmission, and multicast services.

One-Site Deployment and Plug-and-Play

• Is free of software commissioning on site.
• Supports offline deployment and plug-and-play when the device transmits services upstream through a passive optical network (PON) port.
• Automatically obtains configuration data from the iManager U2000 network management system (U2000) and reports its status to the U2000 after going online. The configuration data automatically takes effect.

Zero Touch Routine Maintenance

• Supports fault location through an xPoA command.
• Supports remote fault location and troubleshooting.
• Supports remote acceptance.
• Supports remote upgrade and patch installation.

Carrier-Class Reliability Design

• Complies with carrier-class reliability specifications.
• Passes the electrostatic discharge (ESD) test.
• Be able to start at a -25°C temperature and to work properly for extended periods of time at a temperature as low as -40°C.
• Be able to work properly at a temperature as high as 65°C (temperature at the air intake vent of the cabinet) for extended periods of time.
• Provides surge protection and anti-interference functions.
• Supports user port protection as follows:
  • Digital subscriber line (DSL)/POTS/integrated services digital network (ISDN) ports: complying with K21, 4 kV in common mode and in differential mode
• Supports power protection as follows:
  • DC power: 5 kV in common mode and 3 kV in differential mode
  • AC power: 6 kV
• Uses an anticorrosion design, reduces the wires routed across the surface of the board, and optimizes the heat design by producing a temperature difference to prevent condensation.

How to Query Traffic of a Port on Huawei MA5616?

How to Query Traffic of a Port on Huawei MA5616?

On current ONUs, you can query packet statistics of a port but cannot directly query traffic of a port. To obtain traffic of a port, you can collect the number of frames received or transmitted by the port in a period of time as follows:

1. Query the number of frames received or transmitted by a port at two different time points by running the following commands for different scenarios:
   • On a GPON uplink port, run the interface gponnni command to enter the GPONNNI mode, and then run the display gpon-port statistics command to query the number of frames received or transmitted by a port.
   • On other ports, run the display interface [ interface-type [ interface-number ] ] command to query the number of received or transmitted by the ports.
2. Use the following formula to calculate the number of frames received or transmitted by a port between two time points: Number of frames collected the second time - Number of frames collected the first time.
3. Use the following formula to calculate the traffic on the port: Number of frames x Bytes per frame.

For example, the number of frames on a port are collected at two time points within 30s, and the number of frames between the two time points is 85734 (786687061 - 786601327). Assume that the length of a frame is about 1500 bytes. The traffic on the port within 30s is 981 Mbits (85734 x 1500 x 8= 1,028,808,000 bits), or 122.6 Mbytes.

What Is P2P Optical Access?

Definition
Point-to-point (P2P) Ethernet optical access is a mode in which P2P Ethernet optical access boards provide GE, 10GE and FE ports and coordinate with downstream devices to implement various optical access solutions for users. The solutions include FTTC/FTTB, FTTH, FTTO, FTTM and D-CCAP.

Purpose

• P2P Ethernet optical access is specially applicable to residential communities with optical fibers routed. It provides a more flexible FTTx solution, especially integrated services, including video, voice, and data for users. This feature has the following advantages:
• Higher bandwidth. The FTTH solution implemented through P2P optical access can provide a higher bandwidth for users, meeting the requirements of high-end users.

• Lower costs. P2P Ethernet optical access boards support more cascaded DSLAMs, reducing FTTC/FTTB networking costs.
• Higher reliability. P2P optical access allows a higher reliability in the DSLAM cascading scenario through features such as inter-board aggregation, smart link, and ring check.
• More flexible scenarios. The P2P Ethernet optical access boards coordinate with a variety of downstream devices (such as the DSLAM, ONT, SBU, and CBU) to implement FTTC/FTTB, FTTH, FTTO, FTTM and D-CCAP. Huawei MA5800 configured with the P2P Ethernet optical access board can not only be directly connected to access terminals but also cascade Huawei DSLAMs in order to converge a large number of users.

Why is the Link Status on N2000 NMS Displayed as Normal When the Status of the GE Port of the MA5600 Device is Offline?

Issue Description

Q: 

Why is the link status on N2000 NMS displayed as normal when the status of the GE port of the MA5600 device is offline?

Alarm Information

Null

Handling Process

A:

The query result from the Ethernet port window of the NMS complies with the result displayed on the host. Operation status indicates whether the port is activated; the green icon means the port has been activated; Online status shows whether the physical connection of the port to the external device is normal or not. The display on the NMS interface is consistent with the host. The engineer in charge of the host confirms that the normal connection of the port to the external device is not necessary for the port activation.

The color setting policy for the connection lines between the MA5300 devices is applicable to the connection lines between Huawei MA5600 devices in the NMS. If the port is activated, the connection line is green; if the port is not activated, the connection line is gray. Therefore, even though the physical connection is disconnected, the connection line is still green on the NMS. Thus the problem occurs.

We have two solutions to the above-mentioned problem:

1. Make corresponding modifications on the NMS side. Thus the color for the connection between the NMS devices depends on the connection status of the host.

2. .Modifications of the host Huawei MA5600 is the same as the modification of the network card and Huawei DSLAM MA5300. The port can be activated only when the network line is correctly connected to it.

After discussion, the engineers determine that the problem can be resolved by making corresponding modifications on the NMS side. Thus the color for the connection between the NMS devices depends on the connection status of the host. The problem can be resolved by the patch V200R006B02D030SP10.

Root Cause

Null

Suggestions

Null

Contact information:

Telephone: 852-30623083

Email: Sales@Thunder-Link.com

           Supports@Thunder-link.com            

Website: http://www.thunder-link.com

More related:

Different VLAN with the same IP address segment communicate through the layer three switches
MA5600T Series Maintenance Feature Glance
MA5600T&MA5603T&MA5608T 10G GPON Feature Glance

How to Configure the H.248-based Voice Service?
How to Login Huawei Equipment Through the Local Serial Port

How to adding an ONU to an OLT?

Services can be configured for an ONU only after the ONU is successfully added to an OLT.
Context
When an ONU is added, desired profiles, including the dynamic bandwidth allocation
(DBA) profile, line profile, and alarm profile, must be bound to the ONU. For details
about functions and configuration methods for these profiles
Procedure

Step 1 Configure GPON ONU profiles.
1. Configure a DBA profile.
2. Configure an ONU line profile.
a. Add GPON ONU line profile 10 fttb(c).
b. In the line profile mode, bind the T-CONT to the DBA profile.
c. In the line profile mode, create a GEM port for each T-CONT.
d. Configure mapping between the GEM port and the ONU-side service.
e. After the configuration is completed, run the commit command to make the configured parameters take effect.
3. (Optional) Add an alarm profile.
– The ID of the default Huawei GPON alarm profile is 1. The thresholds for all the alarm parameters in the default alarm profile are 0, which indicates that no alarm is generated.
– In this example, the default alarm profile is used and therefore the configuration of the alarm profile is not required.

Step 2 Add an Huawei ONU to an Huawei OLT.
Assume that the ID of GPON port 0/2/1 is 1, SN is 32303131B39FD641, management mode
is SNMP, and the bound line profile is fttb(c). Connect the ONU to such a GPON port through
the optical splitter.
There are two modes to add an ONT: add an ONT offline and confirm an automatically
discovered ONU.

• Add an ONU offline.
• Confirm an automatically discovered ONU.

1. (Optional) Bind the alarm profile to the ONU.
By default, alarm profile 1 automatically bound to an ONU. A non-default alarm profile
is bound manually only when the default one does not meet the requirement.
In this example, default alarm profile 1 is used and therefore the configuration of the
alarm profile is not required.

Step 3 Check the ONU status.

After Huawei ONU is added, run the display ont info command to query the current status of the
ONU. Ensure that Config flag of the ONU is active, Run State is online, and Config state is

normal.
Follow-up Procedure
When Config state is failed, Run state is offline, or Match state is mismatch:
If Control flag is deactive, run the ont active command in GPON mode to activate the
ONU.
If Run state is offline, a physical line may be broken or the optical module may be
damaged. Check the line and the optical module.
lIf Config state is failed, the configured ONU capability exceeds the actual ONU
capability. In this case, run the display ont failed-configuration command in the
diagnose mode to check the failed configuration item and the failure cause. Then, rectify
the fault accordingly.
If the ONU does not match (Match state is mismatch), the port types and number of
ports do not match the actual port types and number of ports supported by the ONU. In
this case, run the display ont capability command to query the actual capability of the
ONU, and then select one of the following modes to modify the ONU configuration:
– Create a proper ONU profile according to the actual capability of the ONU, and
then run the ont modify command to modify the configuration data of the ONU.
– Modify the ONU profile according to the actual capability of the ONU and save the
modification. Then, the ONU automatically recovers the configuration successfully.

Data Plan Principles for IP Addresses

Data Plan Principles for IP Addresses

Terminal Type:

1, Bridging+Voice ONT
Internet access:A PC obtains an IP address through PPPoE dialup. The ONT transparently transmits the packets.
VoIP:The ONT functions as a DHCP client and obtains an IP address from the DHCP server, or the NMS issues a static IP address to Huawei ONT using the configuration file. Voice signaling and media streams at multiple POTS ports share one IP address. Media streams are distinguished by port.
IPTV:The set top box (STB) obtains an IP address from the DHCP server for ordering programs. The ONT transparently transmits the packets.

2, Bridging ONT+HGW
Internet access:The HGW functions as a PPPoE client and obtains an IP address through PPPoE dialup. At the same time, the HGW functions as a DHCP server and allocates IP addresses to
PCs through the network cable and wireless fidelity (Wi-Fi) access. The ONT transparently transmits the packets.
VoIP:The HGW functions as a DHCP client and obtains an IP address from the DHCP server, or the application control server (ACS) issues a static IP address to the HGW using
TR069. Voice signaling and media streams at multiple Huawei POTS ports share one IP address. Media streams are distinguished by port. The ONT transparently transmits the packets.
IPTV:The HGW is configured with a bridging WAN port. The STB obtains an IP address from the DHCP server. The,HGW transparently transmits packets. The ONT also transparently transmits the packets.

3, Gateway ONT
Internet access:The HGW functions as a PPPoE client and obtains an IP address through PPPoE dialup. The ONT functions as a DHCP server and allocates IP addresses to PCs through the
network cable.
Wi-Fi access:l Layer 3 bridge Wi-Fi access service: A mobile equipment (ME) searches the SSID. After the ME is authenticated, the DHCP server assigns this ME the IP
address by IPoE. l Layer 3 route Wi-Fi access service: An ME searches the SSID. After the ME is authenticated, the DHCP address pool of an ONT assigns this ME the IP address and then
PPPoE dialup is automatically performed on the ONT such as Huawei HG8546M.
VoIP:The ONT functions as a DHCP client and obtains an IP address from the DHCP server, or the NMS issues a static IP address to the ONT using the configuration file. Voice signaling and media streams at multiple POTS ports share one IP address. Media streams are distinguished by port.
IPTV:The ONT functions as a DHCP client and obtains an IP from the DHCP server. At the same time, the ONT functions as a DHCP server and allocates IP addresses to STBs.

The Service port Cannot Display Normally When Double-clicking the MA5600 Network Element to Enter the Board

Issue Description

Q: 

In the NMS topology, the serviceport cannot display normally when double-clicking the network element to enter the board.

Alarm Information

Null

Handling Process

A:

The status of Huawei MA5600 serviceport is the status of the traffic. Only when the single end PVC, the state machine of the traffic and the ADSL port are all  in Up status, the status of the serviceport is Up. Click the Synchronize Network Element in the Serviceport in the Serviceport Plane.

If the board is in position, generally the status of the single end PVC is Up.

The status of the ADSL port is Up after connecting to the modem.

The status of the service port is Up, indicating the normal condition.

Root Cause

1. The MA5600 database is full and the data space and the log space are normal.

2. MA5600 process is abnormal and no boot record. 

3. Other ports of Huawei MA5600 are normal. Only the service port is abnormal.

4. The MA5600 version is matched with the NMS version.

Suggestions

Null

MA5600 Series: Troubleshooting Frequent Interruptions in Internet Service

SmartAX MA5600T/MA5603T Multi-service Access Module Troubleshooting:

This section describes how to troubleshoot frequent interruptions in Internet service for MA5600 series when x digital subscriber line (xDSL) users on fiber to the building (FTTB) and fiber to the curb (FTTC) networks are accessing the Internet.

Use the following guidelines to locate the fault.

Procedure

Step 1 Check the user terminal.

1. Replace the user’s PC and then check whether Internet service is restored.

l If the service is restored, the fault is on the user’s PC. Check whether the NIC in the

user’s PC is faulty or whether the user’s PC is infected with viruses. Then, go to Step

l If the service is not restored, go to Step 1.2.

2. Check the indicator status on the modem to determine whether the modem is being activated

and deactivated frequently.

l If the modem is being activated and deactivated frequently, go to Step 1.3.

l If the modem is not being activated and deactivated frequently, go to Step 2.

3. Replace the modem and then check whether the modem would still be activated and

deactivated frequently.

l If the modem would still be activated and deactivated frequently, go to Step 2.

l If the modem would not be activated and deactivated frequently, go to Step 1.4.

4. Check whether the service recovers to normal.

l If the service is restored, go to Step 6.

l If the service is not restored, go to Step 2.

Step 2 Check the quality of the line between the ONU and the user terminal.

1. Check whether cyclic redundancy code (CRC) loss occurs on the subscriber line.

l If CRC loss occurs on the subscriber line, go to Step 2.2.

l If CRC loss does not occur on the subscriber line, go to Step 3.

NOTE

Query the performance statistics of the faulty port multiple times (recommended: 10 times) and then compare the statistics to check whether packet loss occurs on the subscriber line. The query interval is 20s.

1 Run the display xdsl statistics performance frameid/slotid/portid line-showtime co ever-before command on the ONU to query all the performance statistics of the subscriber line after the subscriber line is initialized. Then, check whether the Count of errored seconds and Count of severely errored seconds increase. If the two numbers increase, packet loss is occurring on the subscriber line.

2. Check the quality of the physical line between the ONU and the modem to determine

whether the line is not connected properly or the line is old. Reconnect the line properly or

replace the old line as needed to ensure good line quality. Then, check whether the modem can be activated.

l If the modem can be activated, go to Step 2.3.

l If the modem cannot be activated, go to Step 2.4.

3. Check whether the service recovers to normal.

l If the service is restored, go to Step 6.

l If the service is not restored, go to Step 2.4.

4. Check whether there is a strong source of interference, such as a wireless base station or a high-frequency switch power system, around the user.

l If there is a strong source of interference around the user, it may be the cause of the

fault. Contact the relevant department to handle it. Then, go to Step 6.

l If there is no strong source of interference around the user, go to Step 2.5.

5. Change a port for the user and configure the necessary data on the ONU. Then, check

whether service is restored.

l If the service is restored, the user port is faulty. Change a port for the user and reconfigure the data. Then, go to Step 6.

l If the service is not restored, go to Step 3.

Step 3 Check whether the user’s MAC address has drifted from one ONU port to another.

1. In global config mode, run the display location mac-addr command to check multiple

times (more than three times is recommended) whether the user’s MAC address has drifted on the port that has learned the user’s MAC address.

l If the MAC address drift occurred, go to Step 3.2.

l If no MAC address drift occurred, go to Step 4.

NOTE

l The mac-addr parameter in the command indicates the user’s MAC address. For modem dialup, the user’s MAC address is the MAC address of the modem. For PC dialup, the user’s MAC address is the MAC address of the PC.

l The F/S/P parameter in the query result indicates the service port that learned the user’s MAC address. Generally, the port displayed in the query result should be the service port of the user. If the displayed port is not the service port of the user, the user’s MAC address has drifted.

2. Check whether a loop has formed or there are user attacks on the port that the user’s MAC address has drifted to. If a loop has formed, disconnect it. If the port that the MAC address has drifted to is being attacked, deactivate the port initiating the attacks. Then, check whether the service is restored.

l If the service is restored, go to Step 6.

l If the service is not restored, go to Step 4.

Step 4 Check whether the BRAS’s MAC address has drifted on the ONU.

1. Run the display location mac-addr command to check multiple times (more than three

times is recommended) whether the BRAS’s MAC address has drifted on the port that has

learned the BRAS’s MAC address.

l If the BRAS’s MAC address has drifted, go to Step 4.2.

l If the BRAS’s MAC address has not drifted, go to Step 5.

SmartAX MA5600T/MA5603T Multi-service Access Module

NOTE

l The mac-addr parameter in the command indicates the BRAS’s MAC address.

l The F/S/P parameter in the query result indicates the uplink port that learned the BRAS’s MAC address. Generally, the port displayed in the query result should be the uplink port on the ONU connected to the BRAS. If the displayed port is not the uplink port, the BRAS’s MAC address has drifted.

2. Check whether a loop has formed or whether there are user attacks on the port where the user’s MAC address has drifted. If such a problem occurs, disconnect the loop or deactivate the port where the user attacks are initiated. Then, perform another dialup check. Then, check whether the service is restored.

l If the service is restored, go to Step 6.

l If the service is not restored, go to Step 5.

Step 5 Record the results of the preceding steps in the form for reporting a fault, fill in the form completely, and then submit the form to Huawei for technical support.

Step 6 The fault is rectified.

—-End

Contact information:

Telephone: 852-30623083

Email: Sales@Thunder-Link.com

           Supports@Thunder-link.com            

Website: http://www.thunder-link.com

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