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.

What Is the Relationship Between the LOF and LOS Alarms?

How to detect LOF and LOS alarms and what is the relationship between these two alarms? What alarm is generated if optical fibers are removed when the Huawei MA5606T or MA5652G serves as an Huawei ONU?

LOF indicates loss of frame. When such an alarm is generated, the ONU can receive optical signals. LOS indicates loss of signal. When such an alarm is generated, the ONU fails to receive optical signals. The mechanisms of detecting LOFi and LOSi alarms are as follows:

• LOFi: If four consecutive frames of an OLT fail to locate an upstream frame of an ONU, the LOFi alarm is generated and the ONU goes offline.
• LOSi: If four consecutive frames of an OLT MA5600T fail to receive an upstream optical signal of an ONU, the LOFi alarm is generated and the ONU goes offline.

The relationship between the LOF and LOS alarms is as follows:

• Use an optical attenuator to test the ATM 155/622 Mbit/s optical port and increase the attenuation gradually. It is found that the alarm status changes as follows: normal -> SD -> LOF -> LOS. This indicates that after LOF is generated, if the attenuation is increased further, no optical signal is received and LOS is generated. If an optical fiber is removed, LOF may be generated first and then LOS, which is related to the alarm detection mechanism. The LOSi, LOFi, and LCDGi alarms are detected in the time window mode. In the first several detections, if the time window detects the threshold for frame losing, the LOFi alarm will be generated.
• If the PON line generates an LOF alarm, LOS will not be generated. This is because the PON port uses the time division system. If an LOF alarm is generated, the ONT goes offline and then the OLT does not assign the timeslot (bandwidth) to the ONU. Therefore, the OLT does not detect whether the ONT transmits upstream optical signals and an LOS alarm is not generated.
• If LOS is generated, LOF/SD will be suppressed. This is because LOS is the alarm of the highest severity.

When the MA5606T and MA5652G serve as an ONU MA5628 and the optical patch is normal, LOS is generated when an optical fiber is removed.

Problems to install N2000 clients in windows Vista

Issue Description

When you are in the process to install the software client N2000 V200R010 in a PC with the operating system Windows Vista the installation was stopped in the 80% of the installation process and the program don't respond. 

Alarm Information

The process of installation is stopped and the program doesn't respond.

Handling Process

To solve this problem was necessary go to internet and from the SUN web page download the jre-6u3-windows-i586-p-s.exe version of Virtual machine with this version the compatibility with windows vista and n2000 V200R010 client works normally.

Root Cause

When you are working with windows vista the java virtual machine that comes installed in the operating system is not compatible with the client software of the N2000 V200R010.

More Related:

iManager U2000 Single-Server System Software Installation Guide

Huawei Low-end Switches Upgrade The APP System

S5720-36C-EI-28S-AC

S5720-50X-EI-46S-AC

Huawei MA5800 Alarms and Events Handling

FAQs of Document Use When Handling Huawei MA5800 Alarms and Events 

This alarm and reference document, if used flexibly, can help you to rectify the faults quickly, thus improving maintenance efficiency and facilitating the management of alarms and events in the system.

Q1: How to enter the special CLI mode

A1: The following considers the FAN mode as an example to describe how to enter the FAN mode:

1. Click a command in the steps.
   
   
2. In the interface that is displayed, you can see the mode of the command. The User Guide describes how to enter this mode.

Q2: Why is the recovery alarm not displayed after the fault is rectified

A2: The following situations may occur:

• This alarm is an ADMC alarm caused by an ADMC fault. After the ADMC fault is rectified, the system does not generate a recovery alarm. Therefore, manual operations are needed. You can run the alarm active clear command to clear the alarms that are not recovered in the system.
• The system checks the faults periodically. The system generates a recovery alarm only after detecting that the faults are rectified.

Q3: How to search for an alarm or event in the document

A3: You can follow one of the following two methods to search for an alarm or event.

• Search for an alarm or event according to the alarm ID or the event ID.
• Search for an alarm or event according to the name of the alarm or event.

More related:

MA5600T Backup Redundant of Configuration Smart Link

P2P Access: Configuring FTTH Service

8-port GPON OLT Interface board H805GPBD

H805GPBD is a 8-port GPON OLT MA5603T MA5600T MA5608T Interface Board. It works with the optical network terminal (ONT) to provide GPON access service.


Working Principle

The basic working principle of the H805GPBD board is as follows:
The control module loads the board software, controls the running of the board, and
manages the board.
The switching module aggregates the signals from eight GPON ports.
The interface module converts between GPON signals and Ethernet packets.
The power module supplies power to other functional modules of the board.
The clock module provides the working clock for other functional modules of the board.

Huawei HG8010H an Intelligent bridging-type ONT

Huawei EchoLife HG8010H optical network terminal (ONT) is a indoor optical network terminal in Huawei FTTx solution. By using GPON technology, ultra-broadband access is provided for home and SOHO users. The HG8010H provides one 10/100/1000M Base-T Ethernet port for connecting to a home gateway. The home gateway then can be connected to a PC, Mobile Terminal, STB, or Video phone to provide high-speed data, video services and WiFi.

Huawei HG8010H Interface Parameters

GPON Port

Class B+

Receiver sensitivity: -27dBm

Wavelength blocking filter (WBF)

Flexible mapping between GEM Port and TCONT

GPON: consistent with the SN or password authentication defined in G.984.3

Bi-direcetional FEC

SR-DBA and NSR-DBA

Ethernet port

Ethernet port-based VLAN tags and tag removal

1:1 VLAN, N:1 VLAN, or VLAN transparent transmission

QinQ VLAN

Limit on the number of learned MAC address

MAC address learning

Transparent transmission of IPv6 packets at Layer 2

Huawei DWDM Flexible Bandwidth Utilization Based on ODUflex

Huawei OptiX OSN 8800 supports the optical data unit flexible (ODUflex) feature. This feature enables the OptiX OSN 8800 to adapt itself to various services, such as video, storage, and data services as well as future IP services.

Transport of Generic CBR Signals

ODUflex can be used to transmit constant bit rate (CBR) services on an optical transport network (OTN). The services whose CBRs are higher than 2.48832 Gbit/s are mapped to an ODUflex (CBR) container in bit synchronization mode. Functions such as end-to-end performance monitoring and protection switching are feasible on the ODUflex (CBR) container. The overheads and monitoring management modes of ODUflex services and traditional ODUk are the same.

below shows how ODUflex is used to transport generic CBR signals. An FC400 service occupies four ODTUk timeslots and is mapped to an ODUflex container. A 3G-SDI service occupies three ODTUk timeslots and is mapped to an ODUflex container. Each ODTUk timeslots provides 1.25 Gbit/s bandwidth. The FC400 and 3G-SDI services share the same OTU2 wavelength.

ODU2 is used to transport generic CBR signals. The FC400 and 3G-SDI services are mapped to different ODU2 containers. Therefore they occupy different OTU2 wavelengths.

Transport of VBR Packet Services

ODUflex can also be used to transport variable bit rate (VBR) packet services to address the requirements of transporting packet services running at VBRs. Since packet services run at VBRs, ITU-T has defined ODUflex(GFP) signals for transporting packet services over an OTN network. The ODUflex(GFP) signals are mapped differently from CBR client signals and use different bit rates as the ODUflex(CBR) signals. The ODUflex(GFP) signals are mapped using the GFP-F method and the bit rate for the signals is defined to about N x 1.25 Gbit/s, where N represents the number of the ODTUk timeslots.

In this application, ODUflex ensures that resilient packet services are correctly transmitted over Huawei OTN network. For example, ODUflex can be used in a 3G backhaul bearer network or an enterprise/bank packet quality private line application. ODUflex(GFP) can flexibly resize the bandwidth based on the bandwidth required by packet services and therefore adapts to flexible changes in service bandwidth and ensures high-quality service transmission.

Huawei S6700 Series Switch Applications

Data Centers
Huawei S6700 can be used in Huawei's sustainable data center solution, which offers four major advantages: evolution, availability, pooling, and visualization.

As shown in the following figure, the S9700 Terabit routing switches function as core switches in a data center and use firewall and load balancer boards to ensure security and load balancing. The S6700 functions as an access switch and provides high-density 10GE ports to connect to 10G servers.

Campus Networks
The S6700 like S6700-48-EI can function as a core switch on a campus network and provide high-density line-speed 10GE ports, rich service features, and comprehensive security mechanisms. This makes Huawei S6700 a cost-effective option.

Huawei OSN3500 Cross-Connect Boards SXCSA

Application

The SXCSA is a super cross-connect and synchronous timing board apply to Huawei MSTP OSN3500. The SXCSA provides service grooming and clock input/output functions in the OptiX OSN system.

The cross-connect and synchronous timing board provides the other boards in the system with the timing information, converges and grooms services, communicates with the other boards in the system, and performs the configuration and management functions for the other boards in the system.

Position of the cross-connect and synchronous timing board in the system 

Working Principle and Signal Flow

Huawei SXCSA consists of the synchronous timing module, cross-connect module, communication and control module, and power module.

Functional block diagram of the SXCSA 

Synchronous Timing Module

The synchronous timing module uses the centralized timing allocation mode as the clock mode. The synchronous timing module also selects one clock source from reference clock sources as the reference clock for the timing module. The reference clock sources are from the line board, the tributary board, or the external synchronous clock source. The synchronous clock source and 2 Mbit/s or 2 MHz external synchronous clock source are then generated.

The precise 38 MHz oscillator ensures that the reference clock complies with ITU-T standards in free-run mode.

The SDH clock (SETS) can work in the following modes:

• Lock mode
• Hold-over mode
• Free-run mode

When working in lock mode, the SETS extracts the clock from three types of timing signals:

• Timing signal (T1) from the STM-N line
• Timing signal (T2) from the PDH line
• Reference signal (T3) from the external synchronous clock source (2 MHz or 2 Mbit/s)

The timing module outputs the following timing signals:

• T0, system clock
• T4, external timing output signal (2 Mbit/s or 2 MHz)

Cross-Connect Module

The cross-connect module consists of two parts:

• SNCP module, which tests relative alarms and reports the alarms to the software to trigger the protection switching such as the SNCP switching and MSP switching.
• Higher order and lower order cross-connect module, which performs the functions of higher order and lower order cross-connect units.

Communication and Control Module

The communication and control module is a sub-system provided by the pinch board. It consists of the CPU, register, Ethernet port, HDLC controller, FPGA loading controller, and bus driver. This module is connected to external circuits through buses to manage and configure other units of the boards.

Power Module

It converts the –48 V/–60 V power supply into the DC voltages that the modules of the board require.

How to Install the Patch of iManager U2000 V100R002C01CP5002 fails?

Issue Description

Customer need to install the patch V100R002C01CP5002 to his U2000 single-server System which is already upgraded to V100R002C01SPC100 , Huawei Engineer follow the installation guide and check all Precautions and the Preparations but when the engineer reach the upgrade step described as below :
12. Run the following commands to install the MSuite patch:
#cd /opt/nmspatch/patch
#chmod 755 *.sh
#./pre_patch.sh
he got the below error message and could not continue the installation
Installing the MSuite patch. Please wait...
Traceback (most recent call last):
File "patch/pre_patch.py", line 446, in ?
_patchNMSApp(curPatchPath)
File "patch/pre_patch.py", line 233, in _patchNMSApp
_copyFile(vcfcfgPath + "/process/process_std", nmsappPath + "/flag/nonCritic
alProcessList")
File "patch/pre_patch.py", line 57, in _copyFile

shutil.copyfile(fromFile, toFile)
File "/opt/U2000/server/3rdTools/python/lib/python2.4/shutil.py", line 49, in
copyfile
fdst = open(dst, 'wb')
IOError: [Errno 2] No such file or directory: '/opt/NMSApp/flag/nonCriticalProce
ssList'
#
please check attached Fig-1.

Alarm Information

None.

Handling Process

WE have check each of previous reason to find the root cause as below
1. NMS process has been already ended as the below commands does not display ( imap_sysmonitor -cmd start )
# ps -ef | grep imap 
2. Sybase database has been already ended as the below commands display no result.
#su - sybase
$cd /opt/sybase/ASE*/install
$ ./showserver|grep DBSVR

3. Msuite process has been already ended as the below commands does not display ( /opt/HWNMSJRE/jre_sol/bin/java -server)
#ps -ef | grep java.
4. UEasy check have been made and it shows no item with [No Go].
we contact RND for support, the reply was to check that No such file or directory: '/opt/NMSApp/flag/nonCriticalProcessList'
when we check we find that '/opt/NMSApp' directory exists, but the flag directory is not exists under that directory as shown in Fig-2,3
The RND reply again to confirm if this is Single Server or HA system , we confirm that it is Single Server system.
Thus the RND find the solution and reply to delete that directory '/opt/NMSApp' . After we delete it, the problem solved and installation complete
as shown in Fig-4.
 

Root Cause

Cause -1- \ the NMS processes have not been ended.
Cause -2- \ the Sybase database is still running and should be ended.
Cause -3- \ the MSuite server process has not been ended.
Cause -4- \ May need to Run UEasy check and send the Output report to ask for support.

Suggestions

It was found that this server has been used for HA before, then it has been modified to be used as single server , this is explain why the folder /opt/NMSApp was exists.
Thus in any case you are going to install that patch on Single-Server system check that this folder is not exists.

More related: 

U2000V100R006C02SPC301 Installation Introduction_Part 1

U2000V100R006C02SPC301 Installation Introduction_Part 2

Installing the U2000 Client on Windows

Troubleshooting the FTTx GPON Service

How to Configurethe GPON FTTH Voice Service?

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.

When the ODUK SPRING Protection Switching Is Performed by Running External Commands, If the OTN Tributary Board Is Not in Position, the Switching May Fail

Issue Description

When the ODUK SPRING protection switching is performed by running external commands, if the OTN Tributary board is not in position, the switching may fail. 

Alarm Information

Null 

Handling Process

If the OTN board for the westward or eastward services of the ODUK SPRING protection is not in position, performing the switching by running external commands is nonsense. If you really intend to perform the switching by running external commands, you must ensure that the OTN board for services in that direction is in position.  

Root Cause

In the network shown in the following figure, NE6 is the management node, and services are 
configured between NE2 and NE6. In addition, the OTN board of NE2 is not in position. 

Under normal conditions, the service flow, indicated by the red real line, is as shown in the figure. When NE6 starts a westward forced switching, NE2 switches from the IDLE page to the eastward switching page. The service flow, indicated by the blue dashed line, is as shown in the figure.
In the process of the switching, if the tributary board of NE2 is in position, the Huawei OTN signal on the protection link is stable and there are no abnormal alarms on the protection channel. But if the tributary board of NE2 is not in position, the OTN signal on the protection link needs to be regenerated by an NS2(OTN board according to certain Recommendations). The regeneration operation requires a certain period of time. The protection channel may detect abnormal alarms before the OTN signal regeneration is completed and immediately reports an SF alarm, which results in the failure of the forced switching.

Suggestions

Null 

Huawei Transponder board LSX Working Principle and Signal Flow Read

Huawei LSX board consists of the client-side optical module, WDM-side optical module, signal processing module, control and communication module, and power supply module.

Functional modules and signal flow of the LSX board



Only the TN12LSX/TN13LSX/TN14LSX board supports FC encapsulation and mapping module.

Signal Flow

In the signal flow of the LSX board, the transmit and the receive directions are defined. The transmit direction is defined as the direction from the client side of the LSX to the WDM side of the LSX, and the receive direction is defined as the reverse direction.

• Transmit direction
  The client-side optical module receives one channel of the optical signals from client equipment through the RX optical interface, and performs O/E conversion.
  After O/E conversion, the electrical signals are sent to the signal processing module. OTU2/OTU2e signals are sent to the client-side OTN processing module for performance monitoring. Other types of signals are sent to different encapsulation and mapping modules for encapsulation and mapping. In the end, operations such as the OTN framing and FEC encoding are performed. Then, the module outputs one channel of OTU2/OTU2e electrical signals.
  The OTU2/OTU2e signals are sent to the WDM-side optical module. After performing E/O conversion, the module sends out OTU2/OTU2e optical signals at DWDM wavelengths that comply with ITU-T G.694.1 through the OUT optical interface.
• Receive direction
  The WDM-side optical module receives one channel of OTU2/OTU2e optical signals at DWDM wavelengths that comply with ITU-T G.694.1 through the IN optical interface. Then, the module performs O/E conversion.
  After O/E conversion, the OTU2/OTU2e signals are sent to the signal processing module. The module performs operations such as OTU2/OTU2e framing, FEC decoding, demapping, and decapsulation processing. Then, the module outputs one channel of OC-192/STM-64/10GE LAN/10GE WAN/OTU2/OTU2e/FC1200 electrical signals.
  The client-side optical module performs E/O conversion of OC-192/STM-64/10GE LAN/10GE WAN/OTU2/OTU2e/FC1200 electrical signals, and then outputs client-side optical signals through the TX optical interface.

Module Function

• Client-side optical module
  The module consists of a client-side receiver and a client-side transmitter.
  • Client-side receiver: Performs O/E conversion of OC-192/STM-64/10GE LAN/10GE WAN/OTU2/OTU2e/FC1200 optical signals.
  • Client-side transmitter: Performs E/O conversion from the internal electrical signals to OC-192/STM-64/10GE LAN/10GE WAN/OTU2/OTU2e/FC1200 optical signals.
  • Reports the performance of the client-side optical interface.
  • Reports the working state of the client-side laser.
• WDM-side optical module
  The module consists of a WDM-side receiver and a WDM-side transmitter.
  • WDM-side receiver: Performs O/E conversion of OTU2/OTU2e optical signals.
  • WDM-side transmitter: Performs E/O conversion from the internal electrical signals to OTU2/OTU2e optical signals.
  • Reports the performance of the WDM-side optical interface.
  • Reports the working state of the WDM-side laser.
• Signal processing module
  The module consists of the SDH/SONET encapsulation and mapping module, 10GE LAN encapsulation and mapping module, client-side OTN processing module, FC encapsulation and mapping module, and OTN processing module.
  • SDH/SONET encapsulation and mapping module
    Encapsulates one channel of SDH/SONET signals and maps the signals into the OTU2/OTU2e payload area. The module also performs the reverse process and has the SDH/SONET performance monitoring function.
  • 10GE LAN encapsulation and mapping module
    Encapsulates one channel of 10GE LAN signals and maps the signals into the OTU2/OTU2e payload area. The module also performs the reverse process and has the 10GE LAN performance monitoring function.
  • FC encapsulation and mapping module
    Encapsulates one channel of FC signals and maps the signals into the OTU2/OTU2e payload area. The module also performs the reverse process and has the FC performance monitoring function.
  • Client-side OTN processing module
    Implements the OTN OSN6800 performance monitoring function.
  • OTN processing module
    Frames OTU2/OTU2e signals, processes overheads in OTU2/OTU2e signals, and performs the FEC encoding and decoding.
• Control and communication module
  • Controls operations on the board.
  • Controls operations on each module of the board according to CPU instructions.
  • Collects information about alarms, performance events, working states and voltage detection from each functional module on the board.
  • Communicates with the system control and communication board.
• Power supply module
  • Converts the DC power supplied by the backplane into the power required by each module on the board.