Huawei SmartAX MA5612 Maintenance Manual page 34

SmartAX MA5612 Multi-service Access Module
Maintenance Guide
To use the exclusive method, maintenance engineers must know stages where the fault may
occur, and use applicable methods (such as loopback and configuration data analysis) to locate
the fault. Therefore, maintenance engineers must be familiar with the following information:
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Protocol Analysis
Protocol analysis locates and troubleshoots a fault when the MA5612 is improperly
interconnected with the upper layer device.
Protocol analysis indicates the method for analyzing a fault by tracing the signaling. To use the
protocol analysis method, maintenance engineers must be familiar with the related protocols and
the exchange process for packets so that they can locate the fault based on the obtained packets.
For example, a user fails to order multicast programs. After the packets are captured and
analyzed, it is found that the BRAS discards the Internet Group Management Protocol (IGMP)
packets sent from the user.
Meter Test
Meter test method locates and troubleshoots a fault by comparing the actual values of
performance parameters tested by various instruments and meters with the correct values.
Instruments and meters directly indicate the running status of the device through visual and
quantitative data.
The following instruments and meters are frequently used for troubleshooting:
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Performance Analysis
Performance analysis uses the performance statistics provided by the MA5612 to analyze the
performance indexes of the faulty service to locate the fault.
Maintenance engineers must query different performance statistics to locate different faults and
therefore they must be familiar with the following information:
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Issue 01 (2012-07-25)
System structure and working principles of the MA5612
Stages where the fault may occur
Fault diagnosis operations, such as loopback and configuration data analysis
Usage of testers
NOTE
The exclusive method involves all the stages on the entire network. It is recommended that maintenance
engineers exclude normal stages in the following principle: remote end first and local end, major cause
first and the minor cause, simpleness first and then complication. This reduces troubleshooting cost and
improves troubleshooting efficiency.
Multimeter
Line tester
Optical power meter
Optical attenuator
System structure and operation mechanism
Statistics provided by the system
Method of querying and analyzing the statistics
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