ZXMW NR8120A&8120D (V2.04.02) Maintenance Guide

ZXMW NR8120A/8120D Digital Microwave Transmission System

Maintenance Guide Version: V2.04.02

ZTE CORPORATION No. 55, Hi-tech Road South, ShenZhen, P.R.China Postcode: 518057 Tel: +86-755-26771900 Fax: +86-755-26770801 URL: http://support.zte.com.cn E-mail: [email protected]

LEGAL INFORMATION Copyright © 2016 ZTE CORPORATION. The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited.

Additionally, the contents of this document are protected by

contractual confidentiality obligations. All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATION or of their respective owners. This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein. ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter herein. ZTE CORPORATION reserves the right to upgrade or make technical change to this product without further notice. Users may visit the ZTE technical support website http://support.zte.com.cn to inquire for related information. The ultimate right to interpret this product resides in ZTE CORPORATION.

Revision History Revision No.

Revision Date

Revision Reason

R1.0

2015-09-17

First edition

Serial Number: SJ-20150804150350-006 Publishing Date: 2015-09-17 (R1.0)

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Contents About This Manual ......................................................................................... I Chapter 1 Routine Maintenance................................................................ 1-1 1.1 Daily Maintenance.............................................................................................. 1-1 1.1.1 Checking the Status of Boards .................................................................. 1-1 1.1.2 Checking the Current 24-Hour Performance Data....................................... 1-2 1.1.3 Checking Performance Data of the Past 10 Days ....................................... 1-2 1.1.4 Checking Alarms ...................................................................................... 1-3 1.1.5 Checking Device Events ........................................................................... 1-4 1.1.6 Checking the Status of Indicators .............................................................. 1-5 1.2 Monthly Maintenance ......................................................................................... 1-5 1.2.1 Checking Power Supply............................................................................ 1-5 1.2.2 Cleaning the Equipment............................................................................ 1-5 1.2.3 Maintaining the Equipment Room Environment .......................................... 1-6 1.3 Quarterly Maintenance ....................................................................................... 1-7 1.3.1 Checking the Receive Level...................................................................... 1-7 1.3.2 Checking the ODU Installation .................................................................. 1-8 1.3.3 Checking the Combiner Installation ........................................................... 1-9 1.3.4 Checking the Antenna Installation ............................................................. 1-9 1.3.5 Checking the IF Cable ............................................................................ 1-10

Chapter 2 Troubleshooting........................................................................ 2-1 2.1 Application Faults............................................................................................... 2-2 2.1.1 A PC Connected to the LMT Interface Cannot Ping Equipment ................... 2-2 2.1.2 A PC Connected to the NMS Interface Cannot Ping the Equipment ............. 2-2 2.2 Radio Link Faults ............................................................................................... 2-3 2.2.1 The Receive Level Does Not Reach the Theoretical Value .......................... 2-3 2.2.2 Error Codes Are Generated on the Radio Link ........................................... 2-4 2.2.3 Radio Link Is Disconnected....................................................................... 2-4 2.2.4 Instantaneous Link Break.......................................................................... 2-5 2.2.5 The MU Loses Lock ................................................................................. 2-5 2.2.6 Air Interface Performance Is Zero .............................................................. 2-5 2.3 TDM Service Faults ............................................................................................ 2-6 2.4 Ethernet Service Faults ...................................................................................... 2-6 2.5 Network Management......................................................................................... 2-7

I SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

2.5.1 Network Management Services Are Disconnected...................................... 2-7 2.5.2 NEs Are Out of Control ............................................................................. 2-7

Chapter 3 Fault Locating Methods............................................................ 3-1 3.1 Performing the Loopback Test ............................................................................. 3-1 3.2 Checking the Ethernet OAM Function .................................................................. 3-3 3.2.1 Checking CFM ......................................................................................... 3-5 3.2.2 Checking EFM ....................................................................................... 3-13 3.3 Performing the MSTP Single-Step Operation ..................................................... 3-16

Chapter 4 Indicators................................................................................... 4-1 Glossary .......................................................................................................... I

II SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

About This Manual Purpose This manual provides information about the routine maintenance methods for the ZXMW NR8120A/8120D Digital Microwave Transmission System. The routine maintenance items and methods are described in accordance with the maintenance period, including day, month, and quarter. The troubleshooting flow, common fault analysis, and fault locating method are also provided for reference in this manual.

Intended Audience This manual is intended for maintenance engineers who work with the ZXMW NR8120A/8120D.

What Is in This Manual This manual contains the following chapters and appendix. Chapter 1, Routine Maintenance

Describes the daily maintenance, monthly maintenance, and quarterly maintenance for the ZXMW NR8120A/8120D.

Chapter 2, Troubleshooting

Describes the common fault analysis, including application fault, radio link fault, TDM service fault, Ethernet service fault, and network management fault.

Chapter 3, Fault Locating

Describes the common fault locating method including loopback

Methods

test, Ethernet OAM test, and MSTP single-step operation.

Chapter 4, Indicators

Describes the indicators of the ZXMW NR8120A/8120D system.

Conventions This manual uses the following typographical conventions: Italics

Variables in commands. It may also refer to other related manuals and documents.

Bold

Menus, menu options, function names, input fields, option button names, check boxes, drop-down lists, dialog box names, window names, parameters, and commands.

Constant width

Text that you type, program codes, filenames, directory names, and function names.

[]

Optional parameters.

{}

Mandatory parameters.

|

Separates individual parameters in a series of parameters.

I SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Danger: indicates an imminently hazardous situation. Failure to comply can result in death or serious injury, equipment damage, or site breakdown. Warning: indicates a potentially hazardous situation. Failure to comply can result in serious injury, equipment damage, or interruption of major services. Caution: indicates a potentially hazardous situation. Failure to comply can result in moderate injury, equipment damage, or interruption of minor services. Note: provides additional information about a certain topic.

II SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1

Routine Maintenance Routine maintenance includes daily maintenance, monthly maintenance, and quarterly maintenance.

Table of Contents Daily Maintenance......................................................................................................1-1 Monthly Maintenance .................................................................................................1-5 Quarterly Maintenance ...............................................................................................1-7

1.1 Daily Maintenance 1.1.1 Checking the Status of Boards This procedure describes how to check the status of boards. By checking the status of boards, maintenance personnel can detect and resolve board faults in a timely manner.

Steps 1. Log in to the WEB LMT system, In the left navigation tree, select Home > Home. The board status information is displayed in the right pane, see Figure 1-1. Figure 1-1 Board Status Information

2. (Optional) If the running indicator of a board is lit red, troubleshoot the board fault immediately. For detailed information, refer to the "ZXMW NR8120AD Digital Microwave Transmission System Alarm and Notification Handling Reference". – End of Steps – 1-1 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

1.1.2 Checking the Current 24-Hour Performance Data This procedure describes how to check the current 24-hour performance data, using the procedure of checking the current 24-hour Ethernet performance data as an example.

Steps 1. Log in to the WEB LMT system, In the left navigation tree, select Performance > ETH > RMON&QoS 15 Min, set Slot No. and Port No. that the service corresponds to, and click the Query button. The 15-minute Ethernet performance data is displayed in the right pane, see Figure 1-2. Figure 1-2 15-Minute Ethernet Performance Statistics Data

2. Check the performance indexes of the current 15 minutes, and verify that the performance indexes are normal. For detailed information of each performance index, refer to the "ZXMW NR8120AD Digital Microwave Transmission System KPI Reference". – End of Steps –

1.1.3 Checking Performance Data of the Past 10 Days This procedure describes how to check the radio link performance data of the past 10 days.

Steps 1. Log in to the WEB LMT system, In the left navigation tree, select Performance > Radio Link > 24 Hour, set Slot No. that the service corresponds to, and click the Query button. The 24-hour radio link performance data is displayed in the right pane, see Figure 1-3.

1-2 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1 Routine Maintenance

Figure 1-3 Radio Link 24-Hour Performance Statistics Data

2. Check the performance indexes of the past 24 hours of the radio link, and verify that the performance indexes are normal. For detailed information of each performance index, refer to the "ZXMW NR8120AD Digital Microwave Transmission System KPI Reference". – End of Steps –

1.1.4 Checking Alarms This procedure describes how to check alarms.

Context In the alarm management window, maintenance personnel can observe and analyze the alarm information reported from each Network Element (NE), including the current alarms, historical alarms, and notifications. It helps detect and resolve the faults or potential faults during network operation in a timely manner.

Note: Here, the process of checking the current alarms is used as an example to describe how to check alarms.

Steps 1. Log in to the WEB LMT system, In the left navigation tree, select Alarm > Current. The shelf diagram is displayed in the right pane. 2. Set Position and Alarm Level, and click the Query button. information is displayed, see Figure 1-4.

The current alarm

1-3 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Figure 1-4 Current Alarm Information

Note: Users can export the alarm query result to an Excel file or a Word file for further analysis and processing.

3. If there is any critical alarm, locate, isolate, and resolve the fault as soon as possible. For detailed information, refer to the "ZXMW NR8120AD Digital Microwave Transmission System Alarm and Notification Handling Reference". – End of Steps –

1.1.5 Checking Device Events This procedure describes how to check device events. By checking device events in the alarm management window, maintenance personnel can detect and resolve the faults or potential faults during network operation in a timely manner.

Steps 1. Log in to the WEB LMT system, In the left navigation tree, select Alarm > Event. The device event information is displayed in the right pane, see Figure 1-5. Figure 1-5 Device Event Information

1-4 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1 Routine Maintenance

2. Verify that there are no abnormal device events. If there is any, locate the system faults and resolve them in a timely manner. – End of Steps –

1.1.6 Checking the Status of Indicators Analyzing the status of indicators is a common method used when a fault is detected. Maintenance personnel can locate and resolve the faults by observing the status of indicators on each board panel. For detailed information of the status of indicators, refer to "Chapter 4 Indicators".

1.2 Monthly Maintenance 1.2.1 Checking Power Supply This procedure describes how to check the equipment's power supply to ensure that the equipment can operate properly.

Steps 1. Verify that the status of the power cabinet (Uninterruptible Power Supply (UPS)) is normal. 2. Verify that the air break switch power supply of the portal frame is normal. 3. Verify that the rack, antenna feeder, IDU, ODU, and lightning protector are well grounded. 4. Verify that the power indicators of the following boards of the IDU are in normal status: The OPWER indicators of the Radio Core Cross Modem Unit A (RCMUA) and Radio Modem Expansion A (RMEA) board. – End of Steps –

1.2.2 Cleaning the Equipment This procedure describes how to clean the equipment. Communication equipment is likely to be contaminated after operating for a long time. Cleaning the equipment regularly can reduce Bit Error Rate (BER), fault rate, and board failure rate by improving the heat dissipation capability of the equipment.

Steps 1. If possible, power off the equipment, detach the circuit boards and components from the equipment in accordance with the specified procedure, and then fully clean each part of the equipment. 1-5 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

2. If it is not allowed to power off the equipment, clean the power-on equipment with one of the following methods whenever applicable: l Spray-wash the equipment first, and then wash it with a water gun. This method is applicable when a lot of dust covers the equipment. Operation procedure: Spray the cleaner on the equipment, wait until the cleaner infiltrates the dirt to insulate the dirt particles and the floating dust deposits, and then, wash the equipment with a water gun. l

Clean the equipment from top to bottom. This method is applicable when the equipment contamination is not serious.

l

Clean the equipment from bottom to top. This method is applicable when the equipment contamination is serious. prevents dirt accumulation on the equipment.

l

It

Collect the dirt between layers and at the bottom. This method is applicable during the entire procedure of cleaning the power-on equipment. Operation procedure: Insert antistatic papers between each shelf and above the cabinet bottom, clean the equipment layer by layer, and extract all the papers.

l

Clean narrow gaps. This method is used to clean a board that has a 3-5 mm gap from other boards or the equipment. Operation procedure: Insert the extension pipe of a special spray gun or a hand-held pressure sprayer into the gap, and spray-wash the board sides.

l

Clean boards without gaps. This method is used to clean boards that do not have gaps from other boards or the equipment. Operation procedure: Insert the extension pipe of a special spray gun into the gap between shelves, and spray-wash the board sides.

l

Clean the fan. Operation procedure: Take out the Radio Fan Asset (RFA) board of the Indoor Unit (IDU) rack, and clean the dirt, to ensure the fan to operate properly.

– End of Steps –

1.2.3 Maintaining the Equipment Room Environment This procedure describes how to maintain the equipment room environment. The equipment room environment includes all the conditions that influence the equipment operation in the equipment room, such as temperature, humidity, and dust. Equipment room environment maintenance protects the equipment from adverse environmental factors. 1-6 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1 Routine Maintenance

Steps 1. Keep a vacuum cleaner in the equipment and clean dust in the equipment periodically. Operation procedure: Use a blower to blow away the dust on the equipment surface, and use absolute alcohol to wash the equipment surface. It is recommended to put a thin layer of heat-conductive silicon oil on the components exposed in the air. 2. Take antistatic measures to protect the equipment. Operation procedure: Keep a certain humidity inside the equipment room, prevent the accumulation of static electricity, and keep good contact between the grounding cable and the equipment. 3. Verify that the air conditioner in the equipment room is operating properly, and keep the temperature inside the equipment room within the range from 15 °C to 35 °C. 4. Keep the humidity inside the equipment room within the range from 20% to 80%, and take waterproof and dampproof measures for the equipment in the rainy season. – End of Steps –

1.3 Quarterly Maintenance 1.3.1 Checking the Receive Level This procedure describes how to check the receive level and the handling methods in case that the receive level is out of the planned range.

Steps 1. Verify that the ODU receive level is within the planned range. a. Log in to the NetNumen U31 client. b. Select Performance > History Performance Data Query. The Add History Performance Data Query window is displayed. c.

Click the Counter Selection tab, set NE Type to ZXMW NR8120A/8120D, set MO Type to NR8120A/8120D ODU, and click OK. The ODU performance statistics data is displayed.

2. Perform relevant operations in accordance with the check result. Check Result

Handling Suggestion

The receive level is lower than

Refer to "2.2.1 The Receive Level Does Not Reach the

the designed value.

Theoretical Value".

1-7 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Check Result

Handling Suggestion

The receive level fluctuates.

l

If frequency interference exists, perform the frequency sweep test to get the interference frequency and adjust the frequency points of the microwave link.

l

If the level attenuation is caused by bad weather like rain, à

Modify the polarization mode to be a lower one, or enable the Adaptive Coding and Modulation (ACM) function.

à

Frequency resources permitting, use a low-band ODU (< 11 GHz).

à

Increase the transmit power, use a large-aperture antenna, and enable the Automatic Transmitter Power Control (ATPC) function.

l

If the receive fault is caused by multipath attenuation, à

Modify the equipment protection mode to space diversity mode to eliminate the multipath effect.

à

Adjust the antenna height.

à

Increase the antenna aperture.

– End of Steps –

1.3.2 Checking the ODU Installation The procedure describes how to check the Outdoor Unit (ODU) installation, to ensure that the ODU can operate properly and well cooperate with other devices.

Steps 1. Verify that the installation position and direction of the ODU's adapter meet the engineering design requirement. 2. Verify that the ODU's adapter is firmly fixed on the pole, meeting the wind resistance requirement. 3. If the ODU is installed in separate mode, verify that the interface of the flexible waveguide flange is firmly and reliably connected to the ODU's adapter, and ensure that the bending radius of the flexible waveguide does not exceed 90°. 4. Verify that the ODU is within the protection range of the lightning rod.

1-8 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1 Routine Maintenance

Note: The protection angle of the antenna's lightning rod must be less than 45°. In areas with high mountains or frequent thunderstorm, the protection angle of the antenna's lightning rod must be less than 30°.

5. Verify that the ODU's grounding cable is properly connected. 6. Verify that the waterproof clay and tape between the Intermediate Frequency (IF) cable and the ODU are reliably sealed. – End of Steps –

1.3.3 Checking the Combiner Installation This procedure describes how to check the combiner installation, to ensure that the combiner can operate properly and well cooperate with other devices.

Steps 1. Verify that the combiner is fastened to the antenna firmly and the four screws are secured. 2. Verify that the combiner is within the protection range of the lightning rod.

Note: The protection angle of the antenna's lightning rod must be less than 45°. In areas with high mountains or frequent thunderstorm, the protection angle of the antenna's lightning rod must be less than 30°.

3. Verify that the combiner does not have water leakage. – End of Steps –

1.3.4 Checking the Antenna Installation This procedure describes how to check the antenna installation, to ensure that the antenna can operate properly and well cooperate with other devices.

Steps 1. Verify that the installation position and direction of the antenna meet the engineering design requirement. 1-9 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

2. Verify that the antenna bracket is firmly and reliably fixed on the pole, meeting the wind resistance requirement. 3. Verify that the antenna is within the protection range of the lightning rod.

Note: The protection angle of the antenna's lightning rod must be less than 45°. In areas with high mountains or frequent thunderstorm, the protection angle of the antenna's lightning rod must be less than 30°.

– End of Steps –

1.3.5 Checking the IF Cable This procedure describes how to check the IF cable, to ensure that the IF cable is properly connected.

Steps 1. Verify that the outdoor connector and grounding clip of the IF cable are well sealed. 2. Verify that the connectors of the IF cable are fastened. 3. Verify that the IF cable is not broken or twisted and its shielding layer is not exposed. 4. Verify that the bending radius of the IF cable is greater than 30 cm. 5. Verify that the grounding points of the IF cable comply with the specification. The IF cable should be more than 60 m in length and is grounded in the three-point grounding mode. If the IF cable is shorter than 60 m, it is recommended to ground the cable in the two-point grounding mode. Waterproofing measures should be made at the grounding points. 6. To satisfy the antenna height adjustment requirement in future, reserve 5-10 m of the IF cable to make a ring and fix it on the metal tower, see Figure 1-6. Figure 1-6 Reserving Certain Length of the IF Cable

1-10 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 1 Routine Maintenance

7. Bind the indoor IF cable and the power cable separately, and fix the IF cable with cable ties. 8. Fix the outdoor IF cable with cable ties every one meter.

Note: At the position where the IF cable is led from outdoors to indoors, if the outdoor IF cable is higher than the feeder window bottom, make a waterproof bend near the feeder window; otherwise, there is no need to make a waterproof bend. For operation details, refer to the "ZXMW NR8120AD Digital Microwave Transmission System Hardware Installation Guide".

– End of Steps –

1-11 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

This page intentionally left blank.

1-12 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 2

Troubleshooting This procedure shows an example when the air interface uses 1+1 configuration. The following principles should be observed for troubleshooting: l l l l

Troubleshoot indoor problems before troubleshooting outdoor problems. Troubleshoot power problems before troubleshooting equipment problems. Troubleshoot local problems before troubleshooting remote problems. Troubleshoot problems below towers before troubleshooting problems above towers.

Figure 2-1 displays the troubleshooting flow. Figure 2-1 Troubleshooting Flow

Table of Contents Application Faults .......................................................................................................2-2 Radio Link Faults .......................................................................................................2-3 TDM Service Faults....................................................................................................2-6 Ethernet Service Faults ..............................................................................................2-6 Network Management ................................................................................................2-7 2-1 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

2.1 Application Faults 2.1.1 A PC Connected to the LMT Interface Cannot Ping Equipment Perform the following troubleshooting steps: 1. Check the IP configuration of the Personal Computer (PC). To access the equipment through the LMT interface, the IP address of the PC must be configured within the same network segment of the default LMT debug IP address. 2. Verify that the FTP process can be accessed. 3. Verify that the PC is configured with only one network adapter. If the PC is configured with two network adapters, it cannot access the equipment sometimes. In this case, disable one network adapter. After that, the PC can access the equipment successfully. 4. Verify that the firewall function is not enabled on the PC. Normally, the firewall function will prohibit some programs to access the network. It is recommended to disable the firewall function or add the ports to be accessed in the firewall configuration. 5. Check the RUN indicator of the Radio Core Cross Modem Unit A (RCMUC) or RCMUD board to verify that the RCMUC or RCMUD board is operating properly. l If the RUN indicator is lit red for five seconds, the RCMUC or RCMUD board is being started. l If the RUN indicator is lit green, the RCMUC or RCMUD board is operating properly. l If the RUN indicator is not lit green after the RCMUC or RCMUD board is started, the RCMUC or RCMUD board may be faulty. 6. If the problem still exists after the previous operations, replace the PC.

2.1.2 A PC Connected to the NMS Interface Cannot Ping the Equipment Perform the following troubleshooting steps: 1. Check the IP configuration of the PC. To access the equipment through the NMS interface, the IP address of the PC and that of the NMS interface must be configured in the same network segment. If the two IP addresses are not configured in the same network segment, reconfigure them, and access the equipment again. 2. Check the port mode and VLAN configuration of the NMS interface. To enable the PC to access equipment, enable the NMS interface, set the port mode of the NMS interface to Access, and set PVID to the NMS VLAN ID. 3. Verify that the PC is configured with only one network adapter. 2-2 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 2 Troubleshooting

If the PC is configured with two network adapters, it cannot access the equipment sometimes. In this case, disable one network adapter. After that, the PC can access the equipment successfully. 4. Verify that the firewall function is not enabled on the PC. Normally, the firewall function will prohibit some programs to access the network. It is recommended to disable the firewall function or add the ports to be accessed in the firewall configuration. 5. Check the RUN indicator of the RCMUC or RCMUD board to verify that the RCMUC or RCMUD board is operating properly. l If the RUN indicator is lit red for five seconds, the RCMUC or RCMUD board is being started. l If the RUN indicator is lit green, the RCMUC or RCMUD board is operating properly. l If the RUN indicator is not lit green after the RCMUC or RCMUD board is started, the RCMUC or RCMUD board may be faulty. 6. If the problem still exists after the previous operations, replace the PC.

2.2 Radio Link Faults 2.2.1 The Receive Level Does Not Reach the Theoretical Value Perform the following troubleshooting steps: 1. Adjust the remote transmitting power within the allowed transmitting power range, and verify that the local Received Signal Level (RSL) is within the normal range. 2. Verify that the antenna direction is aligned with the main lobe direction, see Figure 2-2. Figure 2-2 Antenna Adjustment Diagram

l

If the antenna is not aligned with the main lobe direction, adjust the antenna direction with the main lobe direction. 2-3

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

3. 4.

5.

6.

l If the antenna is aligned with the main lobe direction, go to the next step. Verify that the two ends of the link have consistent antenna polarization, and the ODU and antenna have consistent polarization. Draw the cross section diagram in accordance with the map, and verify that there is no obstacle. If there is any obstacle, modify the mounting height of the antenna or change the route direction. Verify that the feeders and connectors do not have water leakage or are not moist. The connectors include those between the antenna and combiner, between the combiner and ODU, and between the ODU and feeder. If the receive level drops due to water leakage, resolve the water leakage problem or replace the ODU. Verify that the antenna and ODU are in good condition. l Verify that the ODU power does not decrease. If the power is insufficient, replace the ODU. l In areas with serious salt corrosion, verify that the equipment does not rust. If the receive level drops due to antenna rust, use the antenna that provides salt corrosion prevention.

2.2.2 Error Codes Are Generated on the Radio Link Perform the following troubleshooting steps: 1. Verify that the actual operating power and transmitting power of the ODUs at the two ends of the radio link are normal. In the LMT system, if the displayed operating frequency is consistent with the designed value and the difference between the actual transmitting power and the designed value does not exceed ±2 dBm, the radio link is considered normal; otherwise, the radio link is abnormal. 2. Verify that the receive levels of the ODUs are normal. For operation details, refer to "1.3.1 Checking the Receive Level". 3. Verify that the MSE value is normal. If the MSE value is normal, the error code problem is caused by interference. 4. Verify that the IF cables connected to the ODUs are normal. For operation details, refer to "1.3.5 Checking the IF Cable".

2.2.3 Radio Link Is Disconnected Perform the following troubleshooting steps: 1. Adjust the remote transmitting power within the allowed transmitting power range, and verify that the local RSL is within the normal range. 2. Verify that the ODU frequencies at the two ends of the radio link are matched. 3. Verify that the bandwidths and modulation modes of ODUs at the two ends of the radio link are consistent. 4. Verify that the IF interface of the IDU has rated DC voltage. If the IF interface does not have rated DC voltage, replace the IDU. 2-4 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 2 Troubleshooting

5. 6. 7. 8.

Verify that the feeders and feeder connectors are in good condition. Verify that the polarization of the antenna and the ODU are installed properly. Verify that the antenna azimuth does not deviate from the designed azimuth. Verify that there is no obstacle in the radio link.

2.2.4 Instantaneous Link Break Perform the following troubleshooting steps: 1. Verify that the equipment is operating properly. 2. Use the network management software or a level recorder to verify that the instantaneous break is due to signal attenuation. For detailed information, refer to "1.3.1 Checking the Receive Level". 3. Verify that the configured frequency interval is within the allowed range and there is no external frequency interference. If interference exists, find the interference source frequency and modify the equipment frequency. 4. Adjust the mounting height of the antenna.

2.2.5 The MU Loses Lock Perform the following troubleshooting steps: 1. Check incorrect hardware installation and verify that the equipment and antenna feeders are installed properly. 2. Check link loop problem due to incorrect protection configuration and modify the 1+1 protection mode to 1+0 no-protection mode. 3. Check link losing lock due to that the receive level is lower than the threshold value of the high modulation mode and set the working mode to 7M/QPSK. 4. Check logic or software problems and restart the equipment. 5. Check frequency interference and modify the frequency points to another pair of frequency points.

2.2.6 Air Interface Performance Is Zero Perform the following troubleshooting steps: 1. Verify that the weather keeps normal and there is no thunderstorm. 2. Verify that there is no external interference (co-channel interference, and adjacent channel interference) in this duration and no obstacles on the transmission path. 3. Verify that the ODU is properly connected to the antenna. 4. Verify that the configuration is correct. For example, both directions of an antenna must be in the same LAG group or PLA group.

2-5 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

2.3 TDM Service Faults E1 Services Are Disconnected Perform the following troubleshooting steps: 1. Verify that the radio link is operating properly. For operation details, refer to "2.2.3 Radio Link Is Disconnected". 2. Verify that the E1 link status indicator of the RTEA board is in normal status. l If the indicator is lit green, the E1 link is operating properly. l If the indicator is flashing slowly or not lit, some E1 signals or all E1 signals are lost. 3. In the LMT system, verify that the working mode and cross connection of the service boards are configured correctly. 4. Verify that the connectors of E1 signal cables are well made and are connected properly. 5. Verify that the transceiving connections at the equipment side and at the Digital Distribution Frame (DDF) side are connected properly. 6. Find out the E1 impedance (balanced 120 Ω or non-balanced 75 Ω). In the LMT system, verify that the impedance type configured matches the E1 impedance type. 7. Perform the loopback test.

2.4 Ethernet Service Faults Ethernet Services Are Disconnected Perform the following troubleshooting steps: 1. Verify that the radio link is operating properly. For detailed information, refer to "2.2.3 Radio Link Is Disconnected". 2. Verify that Jumbo and HC/PLA are enabled or disables as what they should be. 3. Verify that the GbE interface status indicator of the RCMUA board is in normal status. l If the indicator is lit green or flashing, the link is operating properly. Verify that the Ethernet parameters of the microwave equipment and the port parameters of the network device (such as a switch) connected to the microwave equipment are configured correctly. These parameters include duplex mode, rate, learning mode, self-negotiation mode, flow control and rate setting, default port priority, VLAN setting (VLAN ID, port type, egress policy, and PVID), xSTP setting, LAG setting, and QoS setting. l

If the indicator is not lit, the link signal is lost. à

In the LMT system, verify that the Ethernet port is enabled.

à

If the Ethernet port is electrical port, verify that the Ethernet cable is well made, the crystal connectors are in good condition, the line sequence is correct, and the cable is connected reliably. 2-6

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 2 Troubleshooting à

If the Ethernet port is optical port, verify that the optical fiber is connected properly, the optical module is operating properly, and the working modes are matched.

2.5 Network Management 2.5.1 Network Management Services Are Disconnected Perform the following troubleshooting steps: 1. Verify that the radio link is operating properly. For detailed information, refer to "2.2.3 Radio Link Is Disconnected". 2. Verify that the Ethernet service is operating properly. For detailed information, refer to "2.4 Ethernet Service Faults". 3. Verify that the VLAN ID parameter and the Bandwidth parameter are set correctly. 4. Verify that the equipment's IP address is set correctly. l If the equipment is working in the layer-2 switching mode, verify that all IP addresses satisfying the layer-2 switching protocol are in the same subnetwork. l If the equipment is working in the layer-3 routing mode, verify that the Open Shortest Path First (OSPF) configuration is correct, and verify that the following cases do not exist: à

There are network management routes missed.

à

Network management services are disconnected due to the equipment's crossing network segments.

Users can add routes for the equipment in accordance with the actual condition. 5. Verify that the transmission channel between the equipment and the Network Management Server (NMS) is normal.

2.5.2 NEs Are Out of Control Perform the following troubleshooting steps: 1. Verify that the Ethernet cables are connected properly. 2. Ping the EMS server from the NEs respectively. Verify that the IP configurations of the NEs are the same with the design. 3. Check the MAC addresses of the NEs and verify that the NEs are configured with different MAC address.

2-7 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

This page intentionally left blank.

2-8 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3

Fault Locating Methods Table of Contents Performing the Loopback Test ....................................................................................3-1 Checking the Ethernet OAM Function.........................................................................3-3 Performing the MSTP Single-Step Operation ...........................................................3-16

3.1 Performing the Loopback Test This procedure describes how to perform the loopback test. Loopback is the process of an NE's transmitting a signal from its transmit port and receiving the signal from its receive port. The loopback test helps detect the transmission link problems. Through the loopback operation, maintenance personnel can locate NE faults along the communication link section by section. It helps check the operating status of each node and the transmission link, and rapidly locates the faulty NEs and faulty boards, which facilitates equipment commissioning and debugging. In the NR8000 Series WEB LMT system, users can set radio link loopbacks (including modulation/demodulation loopback and IF loopback), Time Division Multiplexing (TDM) loopback, and Ethernet loopback.

Radio Link Loopback Radio link loopback helps check whether the E1 service is operating properly.

Note: The Ethernet service will be interrupted when the radio link loopback test is being implemented.

The following describes the radio link loopback test procedure: 1. Connect the device to an error bit tester. 2. Log in to the WEB LMT system, In the left navigation tree, select Maintenance > Radio Port. The radio link loopback setting pane is displayed on the right, see Figure 3-1.

3-1 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Figure 3-1 Radio Link Loopback Setting Pane

3. Select Loopback Enable for the corresponding loopback items such as MF Loopback and IF Loopback, enter the corresponding Loopback Time, click the Apply button, and verify that the Bit Error Rate (BER) is zero. l If the BER is zero, the E1 service between the local error bit tester and the local RCMUC/RMEA is normal. l If the BER is not zero, the E1 service between the local error bit tester and the local RCMUC/RMEA is abnormal, and the fault exists between the local error bit tester and the local RCMUC/RMEA.

TDM Loopback The following describes the TDM loopback test procedure: 1. Connect the equipment to an error bit tester. 2. Log in to the WEB LMT system, In the left navigation tree, select TDM > Port Configuration, and set the Port Status of the corresponding port to Port Enable. 3. In the left navigation tree, select Maintenance > TDM Port Loopback. The TDM loopback setting pane is displayed on the right, see Figure 3-2.

3-2 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

Figure 3-2 TDM Loopback Setting Pane

4. Select a slot number, set Loopback Time and Loopback Type. For detailed information of the loopback types supported by TDM ports, refer to Table 3-1. Table 3-1 Loopback Types Supported by TDM Ports Port Type

Loopback Type

Description

E1 electrical

l

Loopback off

Inner Loopback: The loopback test is implemented at

port

l

Inner loopback

the remote electrical port. This loopback type is used

l

Outer loopback

to check whether the E1 service towards the remote service board is normal. It also helps check whether the cables connected to the remote service board are normal. Outer Loopback: The loopback test is implemented at the local electrical port. This loopback type is used to check whether the E1 service entering the local service board is normal. It also helps check whether the cables connected to the local service board are normal.

5. Click the Apply button, and verify that the BER is zero.

3.2 Checking the Ethernet OAM Function Ethernet Operation, Administration and Maintenance (OAM) involves fault management and performance management. When a fault occurs in the network, OAM helps maintenance personnel rapidly locate the fault and find out the fault cause. Performance

3-3 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

management of OAM helps maintenance personnel monitor real-time network operations, including frame loss rate, frame delay, and jitter. This section uses the procedure of checking link connectivity as an example to describe how to check the Ethernet OAM function. In this example, the equipment reports the Continuity Check Message (CCM) loss alarm. Figure 3-3 shows the troubleshooting flow. Figure 3-3 Troubleshooting Link Connectivity Problems

The following describes the troubleshooting procedure: 1. In the MP configuration window, find the Medium Access Control (MAC) address of the Remote Maintenance association End Point (RMEP) corresponding to the Local Maintenance association End Point (LMEP) that reports the CCM loss alarm, and initiates the Loopback (LB) function towards the MAC address to check the network connectivity. l If the Loopback Reply (LBR) message is returned, the link is connected. l If no LBR message is returned, the link is faulty. 2. Initiate the Link Trace (LT) function towards the MAC address found in step 1 to locate the link problem. Based on the LT result, find the equipment that last responds the Link Trace Reply (LTR) message, and check the RMEP MAC address configured for the faulty link on the equipment, to find out the faulty point-to-point link. 3. Troubleshoot equipment faults at the two ends of the link. 4. Troubleshoot connection media faults between the two ends of the link.

3-4 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

3.2.1 Checking CFM This procedure describes how to check the Connectivity Fault Management (CFM) function. CFM reports alarms and locates faults for layer-2 links.

Prerequisite Users have logged in to the NR8000 Series WEB LMT system, and performed global and Maintenance Domain (MD) configuration, Maintenance Association (MA) configuration, and Maintenance Point (MP) configuration related to CFM.

Steps 1. In the left navigation tree, select ETH > OAM_CFM > Performance Test. Performance Test pane is displayed on the right.

The

2. Set the parameters, and click the Apply button. The performance test function is enabled, see Figure 3-4. Figure 3-4 Performance Test Pane

For a description of the parameters, refer to the following table. Parameter

Description

MD Name

Select an MD name from the configured MD list.

MA Name

Select an MA name from the configured MA list.

LMEP ID

Sets the local MEP ID configured for the port.

Operation Type

Sets the testing function type, including Single-ended LM, One-way DM, Two-way DM, Test Transmission, and Test Reception. 3-5

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Parameter

Description

Interval

Sets the interval between sending functional packets. If Operator Type is set to Test Transmission or Test Reception, this parameter becomes unavailable.

Transmit Type

Sets the packet transmit type to be Unicast or Multicast.

Performance Test

Sets whether the function is enabled.

RMEP ID

Sets the remote MEP ID.

Require Times

Sets the number of times that a functional packet is transmitted. If Operator Type is set to Test Transmission or Test Reception, this parameter becomes unavailable.

TST Transmit Rate

Sets the packet transmitting rate. This parameter is valid only when the Operator Type parameter is set to Test Transmission or Test Reception.

TST Packet Length

Sets the packet length. This parameter is valid only when the Operator Type parameter is set to Test Transmission or Test Reception.

TST Test Time

Sets the test duration. This parameter is valid only when the Operator Type parameter is set to Test Transmission or Test Reception.

3. In the left navigation tree, select ETH > OAM_CFM > Loopback. The CFM Loopback pane is displayed on the right. 4. Set the parameters, and click the Apply button. The CFM loopback function is enabled, see Figure 3-5. Figure 3-5 CFM Loopback Pane

For a description of the parameters, refer to the following table.

3-6 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

Parameter

Description

MD Name

Select an MD name from the configured MD list.

MA Name

Select an MA name from the configured MA list.

MPID Primary Key

Sets the local MEP ID configured for the port.

Loopback

Sets whether the function is enabled.

Repeat Count

Sets the number of times that an LBM packet is sent by the local end.

Data Length

Sets the length of a packet sent by the LB function.

TimeOut Time

Sets the timeout value for the remote end to send the LBR packet.

Transmit Type

Sets the packet transmit type to be Unicast or Multicast.

Destination MAC

Sets the MAC address of the remote end.

5. In the left navigation tree, select ETH > OAM_CFM > Link Trace. The Link Trace pane is displayed on the right. 6. Set the parameters, and click the Apply button. The CFM link trace function is enabled, see Figure 3-6. Figure 3-6 CFM Link Trace Pane

For a description of the parameters, refer to the following table. Parameter

Description

MD Name

Select an MD name from the configured MD list.

MA Name

Select an MA name from the configured MA list.

MPID Primary Key

Sets the local MEP ID configured for the port.

Link Trace

Sets whether the function is enabled.

Destination MAC

Sets the MAC address of the remote end.

3-7 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Parameter

Description

TTL

Sets the TTL of an LT packet.

TimeOut Time

Sets the timeout value for the remote end to send the LBR packet.

7. In the left navigation tree, select ETH > OAM_CFM > Operation Result Info. The Operation Result Info pane is displayed on the right, including the functions of test, LM, unidirectional DM, bidirectional DM, loopback test, and link trace.

Note: For functions except unidirectional DM, the query result can be displayed until the functions are implemented completely. Each query only displays the result of the latest operation, and historical operation results will not be displayed.

a. Select an MP record, which records the CFM operations of the MP, and click the TEST button. The query result is displayed, see Figure 3-7. Figure 3-7 CFM Function Result Pane - TEST Button

For a description of the query result, refer to the following table. Parameter Valid Result

Description 1 indicates that the result is valid while 0 indicates that the result is invalid. An invalid result indicates that unknown errors occur during the calculation process, causing the result invalid. Normally, the displayed query result is valid.

Source MP ID

Displays the MP ID configured for the end where the Test Transmission function is initiated.

Destination MAC

Displays the MAC address configured for the end where the Test Reception function is initiated.

Bandwidth

Obtained through the CFM protocol packet test.

Throughput

Obtained through the CFM protocol packet test.

Number of Loss Packet

Displays the number of lost CFM protocol packets that are used for the TEST function whose Operator Type is set to Test Transmission or Test Reception. 3-8

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

Parameter

Description

Start Time

Displays the starting time of the test.

End Time

Displays the ending time of the test.

b. Select an MP record, and click the LM button. The query result is displayed, see Figure 3-8. Figure 3-8 CFM Function Result Pane - LM Button

For a description of the query result, refer to the following table. Parameter

Description

Valid Result

1 indicates that the result is valid while 0 indicates that the result is invalid. An invalid result indicates that unknown errors occur during the calculation process, causing the result invalid. Normally, the displayed query result is valid.

Source MP ID

Displays the MP ID configured for the end where the LM transmit function is initiated.

Destination MP ID

Displays the MP ID of the destination end of the test.

Local Last Loss Rate of

After the LM function is enabled, the system calculates the packet loss

Packet

rate every an interval that is set when the function is enabled. This parameter indicates the packet loss rate within the last interval while Local indicates that the packet loss rate is calculated in the direction from the destination end to the local end.

Local Average Loss Rate

Indicates the average value of the local packet loss rates within all the

of Packet

intervals of the test.

Remote Last Loss Rate of

After the LM function is enabled, the system calculates the packet loss

Packet

rate every an interval that is set when the function is enabled. This parameter indicates the packet loss rate within the last interval while Remote indicates that the packet loss rate is calculated in the direction from the local end to the destination end.

Remote Average Loss

Indicates the average value of the remote packet loss rates within all the

Rate of Packet

intervals of the test.

Start Time

Displays the starting time of the test.

End Time

Displays the ending time of the test. 3-9

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

c.

Select an MP record, and click the Two-way DM button. The query result is displayed, see Figure 3-9. Figure 3-9 CFM Function Result Pane - Two-way DM Button

For a description of the query result, refer to the following table. Parameter

Description

Valid Result

1 indicates that the result is valid while 0 indicates that the result is invalid. An invalid result indicates that unknown errors occur during the calculation process, causing the result invalid. Normally, the displayed query result is valid.

Source MP ID

Displays the MP ID configured for the end where the bidirectional DM transmit function is initiated.

Destination MP ID

Displays the MP ID of the destination end of the test.

Last Two-way Delay

Displays the bidirectional delay calculated within the last interval.

Average Two-way Delay

Displays the average delay of all the calculated delays of the test.

Average Delay Vibration

Displays the average value of all the calculated delay jitters of the test.

Start Time

Displays the starting time of the test.

End Time

Displays the ending time of the test.

l l

Note: The One-way DM function is similar to the Two-way DM function. The result of the One-way DM test must be queried at the destination end.

d. Select an MP record, and click the Loopback button. displayed, see Figure 3-10.

The query result is

Figure 3-10 CFM Function Result Pane - Loopback Button

3-10 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

For a description of the query result, refer to the following table. Parameter

Description

Valid Result

1 indicates that the result is valid while 0 indicates that the result is invalid. An invalid result indicates that unknown errors occur during the calculation process, causing the result invalid. Normally, the displayed query result is valid.

Source MP ID

Displays the MP ID configured for the end where the loopback test transmit function is initiated.

Destination MAC

Displays the MAC address configured for the end where the loopback test receive function is initiated.

Number of Sending LBM

Displays the total number of LBM packets sent in the test.

Number of Receiving LBR

Displays the total number of LBM packets received in the test. Normally, the destination end returns an LBR packet to the source end every time it receives an LBM packet. According to Number of Sending LBM and Number of Receiving LBR, users can determine whether the link between the source end and the destination end is normal.

Start Time

Displays the starting time of the test.

End Time

Displays the ending time of the test.

e. Select an MP record, and click the Linktrace button. After an MP in the link receives the LTM packet, it will return the LTR packet to the transmit end. The query result of this function displays the information of each LTR received at the local end, and at most 20 records can be displayed. Figure 3-11 shows an example of the query result that one LTR packet is received. Figure 3-11 CFM Function Result Pane - Linktrace Button

For a description of the query result, refer to the following table.

3-11 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Parameter

Description

Valid Result

1 indicates that the result is valid while 0 indicates that the result is invalid. An invalid result indicates that unknown errors occur during the calculation process, causing the result invalid. Normally, the displayed query result is valid.

Source MP ID

Displays the MP ID configured for the end where the link trace transmit function is initiated.

Destination MAC

Displays the MAC address configured for the end where the link trace receive function is initiated.

TTL

Displays the number of hops that the LTM packet can be transmitted after the transmit end of the LTR packet receives the LTM packet. If TTL is 0, it indicates that the LTM packet will not be transmitted any more.

Node MAC

Displays the MAC address of the end where the MP that sends the LTR is located.

Hit Flag

Indicates whether the LTM packet reaches the destination end. If it is 1, the LTM reaches the destination end. If it is 2, the LTM does not reach the destination end. If Hit Flag of all the records is 1 and TTL is larger than 0 (the number of records displayed is less than 20), users can determine that the link fault is located after the source end of the last LTR.

Start Time

Displays the starting time of the test.

End Time

Displays the ending time of the test.

8. Select ETH > OAM_CFM > AIS&LCK Info from the left navigation tree. The AIS and LCK Information pane is displayed on the right. 9. Set MD Name, MA Name, and MP ID Primary Key, and click the AIS Query button or the LCK Query button. The query result is displayed, indicating whether there is any AIS packet or LCK packet received, see Figure 3-12. Figure 3-12 AIS and LCK Information Pane

3-12 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

Note: If there is any AIS packet or LCK packet received, the system displays the transmit interval of the packet.

– End of Steps –

3.2.2 Checking EFM This procedure describes how to check the Ethernet in the First Mile (EFM) function. EFM involves link-level management. It monitors point-to-point (or virtual point-to-point) Ethernet links in the network and troubleshoot problems if there is any.

Steps 1. Select ETH > OAM_EFM > Global Configuration from the left navigation tree. The EFM Global Configuration pane is displayed on the right. 2. Set the parameters, and click the Apply button, see Figure 3-13. Figure 3-13 EFM Global Configuration Example

For a description of the parameters, refer to the following table. Parameter

Description

EFM Global Configuration

Indicates the global switch of the EFM protocol.

Loopback Timeout

Sets the timeout threshold of waiting for the response of the opposite end when EFM is performing the loopback operation.

Link Monitor

Indicates the gobal switch of the link event monitoring function of EFM.

Loopback

Sets whether EFM supports the loopback function. 3-13

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Parameter

Description

OUI Information

Provides the unique identification information of EFM. Users can enter at most three English characters in the text box.

Vendor Information

Indicates the information customized by the vendor, and is an integer ranging from 0 to 255.

3. Select ETH > OAM_EFM > Port Configuration. The EFM Interface Configuration pane is displayed on the right, see Figure 3-14. Figure 3-14 EFM Interface Configuration Pane

4. Click the Add button. The EFM Interface Modification pane is displayed, see Figure 3-15. Figure 3-15 EFM Interface Configuration Example

For a description of the parameters, refer to the following table. Parameter

Description

Port

select a port from the drop-down list box, which contains the added Ethernet ports.

Status

sets whether to enable the EFM protocol. 3-14

SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 3 Fault Locating Methods

Parameter

Description

Interface EFM Mode

Sets the operating mode of EFM at the port. The value range is Active and Passive.

Lost Link Threshold

Sets the timeout threshold in EFM's judging whether the port is disconnected from the opposite-end link.

Link Monitor Function

Sets whether EFM monitors the link of the port.

Errored Symbol Threshold

Sets the threshold of the number of error symbols for EFM's judging whether an error symbol event occurs at the port.

Errored Symbol Window

Sets the size of the statistics window for EFM's judging whether an error symbol event occurs at the port.

Errored Frame Threshold

Sets the threshold for EFM's judging whether an error frame event occurs at the port.

Errored Frame Window

Sets the size of the statistics window for EFM's judging whether an error frame event occurs at the port.

Errored Frame Period

Sets the threshold for EFM's judging whether an error frame period

Threshold

event occurs at the port.

Errored Frame Period Window

Sets the size of the statistics window for EFM's judging whether an error frame period event occurs at the port.

Errored Frame Seconds

Sets the threshold for EFM's judging whether an error frame

Summary Threshold

seconds summary event occurs at the port

Errored Frame Seconds

Sets the size of the statistics window for EFM's judging whether an

Summary Window

error frame seconds summary event occurs at the port.

5. Set the parameters, and click the Apply button. 6. Select ETH > OAM_EFM > Loopback from the left navigation tree. Loopback pane is displayed on the right.

The EFM

7. Click the Start Loopback button. The loopback test function is started. 8. After the required loopback test duration is reached, click the Stop Loopback button. The loopback operation is stopped. 9. Click the Result Query button. The system displays the information of Send Packet statistics and Receive Packet statistics, which helps users find out the link status, see Figure 3-16. Figure 3-16 EFM Loopback Pane

3-15 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Note: The more approximate Send Packet statistics and Receive Packet statistics are, the better the link performance is.

10. Select ETH > OAM_EFM > Protocol Info from the left navigation tree. The EFM Protocol Status Query pane is displayed on the right. 11. Select a relevant Ethernet interface, and click the Query button. The system displays the state machines of EFM, see Figure 3-17. Figure 3-17 EFM Protocol Status Query

– End of Steps –

3.3 Performing the MSTP Single-Step Operation In the Spanning Tree Protocol (STP) global configuration window (operation path: ETH > XSTP > Global Configuration), if Force Version of a device is set to MSTP or RSTP and the device is connected to an STP device, the connected port will automatically migrate to the STP mode. When the device on which STP is operating is removed, the port cannot automatically migrate to the MSTP/RSTP mode. In this case, users can perform the M_Check operation to forcedly make the port migrate to Multiple Spanning Tree Protocol (MSTP) mode or Rapid Spanning Tree Protocol (RSTP) mode.

Steps 1. Select ETH > XSTP > Migrate Check from the left navigation tree. The Migrate Check pane is displayed on the right, see Figure 3-18. Figure 3-18 M_Check Example

2. Set Port, and click the mCheck button. – End of Steps –

3-16 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 4

Indicators RCMUC Board Indicators Name

Color

Description

Status

ALM

Red

Board alarm indicator

l

Steady on for 5 s: When the device is started or reset, this indicator is on for 5 s, and then goes off. This indicates that the system is restarted.

RUN

Green

Board status indicator

l

Flashing fast: severe alarm.

l

Flashing slowly: major alarm.

l

Steady on: minor alarm.

l

Off: no alarm.

l

Flashing fast in green: The board is being powered on and initialized in the boot stage.

l

Flashing slowly in green: The board is operating properly in the software running stage.

l

Steady on in green: The CPU is out of control in the software running stage.

PS

LINK

Green

Green

–48 V power indicator

Wireless link status

l

Steady on: The –48 V power input is normal.

l

Off: no power input or out of the input range.

l

Steady on: The wireless link is in

indicator

synchronization status. l

Flashing fast: The wireless link is in capture status.

OPWR

Green

ODU power indicator

l

Off: The wireless link is out of synchronization.

l

Steady on: The ODU is operating properly.

l

Not lit: The -48 V power supply for the ODU is unavailable.

USB

Green

l

USB interface operational status

WiFi is being started. l

indicator

Flashing slowly: USB insertion is detected. Steady on: USB WiFi is operating properly.

l

Off: USB insertion is not detected.

l

Flashing fast: in USB site commissioning and self-detection.

4-1 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

Name

Color

Description

Status

GbE1

Green

GE interface status

l

indicator

GbE2

Steady on: The Ethernet connection is normal.

GbE3

l

Flashing fast: Data is being transferred.

l

Off: The link is disconnected.

GbE4

RCMUD Board Indicators Name

Color

Description

Status

ALM

Red

Board alarm indicator

l

Steady on for 5 s: When the device is started or reset, this indicator is on for 5 s, and then goes off. This indicates that the system is restarted.

RUN

Green

Board status indicator

l

Flashing fast: severe alarm.

l

Flashing slowly: major alarm.

l

Steady on: minor alarm.

l

Off: no alarm.

l

Flashing fast in green: The board is being powered on and initialized in the boot stage.

l

Flashing slowly in green: The board is operating properly in the software running stage.

l

Steady on in green: The CPU is out of control in the software running stage.

PS

LINK

Green

Green

–48 V power indicator

Wireless link status

l

Steady on: The –48 V power input is normal.

l

Off: no power input or out of the input range.

l

Steady on: The wireless link is in

indicator

synchronization status. l

Flashing fast: The wireless link is in capture status.

OPWR

Green

ODU power indicator

l

Off: The wireless link is out of synchronization.

l

Steady on: The ODU is operating properly.

l

Not lit: The -48 V power supply for the ODU is unavailable.

USB

Green

l

USB interface operational status indicator

Flashing slowly: USB insertion is detected. WiFi is being started.

l

Steady on: USB WiFi is operating properly.

l

Off: USB insertion is not detected.

l

Flashing fast: in USB site commissioning and self-detection.

4-2 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Chapter 4 Indicators

Name

Color

Description

Status

GbE1

Green

GE interface status

l

indicator

GbE2

Steady on: The Ethernet connection is normal.

GbE3

l

Flashing fast: Data is being transferred.

l

Off: The link is disconnected.

GbE4

RTEA Board Indicators Name

Color

Description

Status

E1

Green

The 16 E1 links status

l

Lit: All the 16 E1s are operating properly.

indicator

l

Not lit: All signals of the 16 E1s are lost.

l

Flashing at 1 Hz: Some E1s are operating properly while the other E1s lose signal.

RTEB Board Indicators Name

Color

Description

Status

E1

Green

The 16-channel E1 link

l

Lit: All the 16 E1 lines are normal..

status

l

Not lit: All the 16 E1 lines lose signals.

l

Flashing at 1 Hz: Some E1 signals are normal and the others are lost.

RFAD Board Indicators Name

Color

Description

Status

RUN

Green

Operating status

l

indicator

Lit: The board is powered on and is in the non-controlled status.

l

Flashing at 1 Hz: The fan is operating

l

Not lit: The board is not powered on or the

properly and is in the controlled status. self-test fails. ALM

Red

Fan alarm indicator

l

Not lit: There is no alarm.

l

Flashing at 5 Hz: critical or major alarm

l

Flashing at 1 Hz: minor alarm or warning

4-3 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

This page intentionally left blank.

4-4 SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

Glossary ACM - Adaptive Coding and Modulation ATPC - Automatic Transmit Power Control BER - Bit Error Rate CCM - Continuity Check Message CFM - Connectivity Fault Management DDF - Digital Distribution Frame EFM - Ethernet in the First Mile IDU - Indoor Unit IF - intermediate Frequency LB - Loopback LBR - Loopback Reply LMEP - Local Maintenance association End Point LT - Link Trace LTR - Link Trace Reply MA - Maintenance Association MAC - Media Access Control MD - Maintenance Domain I SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential

ZXMW NR8120A/8120D Maintenance Guide

MP - Maintenance Point MSTP - Multiple Spanning Tree Protocol NE - Network Element NMS - Network Management System OAM - Operation, Administration and Maintenance ODU - Outdoor Unit OSPF - Open Shortest Path First PC - Personal Computer RCMUA - Radio Core Cross Modem Unit A RFA - Radio Fan Asset RMEA - Radio Modem Expansion A RMEP - Remote Maintenance association End Point RSL - Received Signal Level RSTP - Rapid Spanning Tree Protocol STP - Spanning Tree Protocol TDM - Time Division Multiplexing UPS - Uninterruptible Power Supply

II SJ-20150804150350-006|2015-09-17 (R1.0)

ZTE Proprietary and Confidential