Common Maintenance Operations

This topic provides a full view of common WDM NE maintenance operations and describes related functions and scenarios.

Function	Maintenance Operation	Usage	Application Scenario
Network Data Maintenance	Backing Up and Restoring the NE Data	This operation can save important NE configuration data to keep the data secure.	If service interruption or NE faults occur and result in database file corruption or loss during NE upgrades or downgrades, NE data can be restored from the backup. Therefore, the data backup and restore function ensures the security and integrity of NE data.
Network Data Maintenance	Keeping Data Consistency Between the Web LCT and NEs	If data is inconsistent between the Web LCT and NEs, users may make incorrect decisions or perform incorrect operations. Keeping data consistent between the Web LCT and NEs is the basis of appropriate NE management on the Web LCT.	Users need to check data consistency between the Web LCT and NEs during NE data synchronization, upload, download, consistency check, and copying.
Communication Maintenance	General Operations in the DCC View	The data communications channel (DCC) view makes NE communication status and communication links visible to engineers, which facilitates deployment and maintenance.	Network data changes during site deployment, site expansion, and DCC subnet division. By synchronizing the network-wide DCC view, users can obtain the latest DCC subnet data and learn recent data changes.
Communication Maintenance	Checking the Network Communication Status	Network communication status reflects the communication condition between the Web LCT and NEs.	The data communication network (DCN) between the Web LCT server and clients is unstable sometimes. In such situations, the Web LCT reports transient network interruption and cannot manage some NEs. At this time, users can perform this operation.
Clock Maintenance	Viewing Clock Synchronization Status	This operation is performed to monitor the synchronization status of clocks on networks.	If clocks are not synchronized between NEs, the NEs may encounter pointer justification, bit errors, or even service interruption. To prevent such problems, users can monitor NE clocks on the Web LCT.
	Viewing the Clock Tracing Status	This operation is performed to monitor the clock tracing status of each site.	Based on clock tracing status, users can learn clock tracing relationships and ensure network-wide clock synchronization.
	Configuring Switching Conditions for Clock Sources	This operation is performed to configure clock source switching conditions and reduce impact on services.	Switching conditions can be configured for line clock sources to switch clock sources quickly and reduce impact on services after clock sources fail.
	Switching a Clock Source	Manual clock source switching prevents services from being interrupted due to clock deterioration.	When a clock source deteriorates, downstream NEs may not be able to switch to another clock source immediately. To prevent impact on services, users need to manually switch the clock source on the NEs.
NE Status Configuration and Maintenance	Configuring NE Data	NE data configuration includes uploading NE data, manually configuring NE data, copying NE data, and configuring service capacity.	NEs are in the unconfigured state after being successfully created on the Web LCT. The Web LCT can manage these NEs only after the NE data is configured.
	Configuring Boards and Ports	Board and port configuration includes adding boards, adding subboards, deleting subboards, configuring service mapping, adding ports, and modifying ports.	Users can add boards on the NE Panel and set port attributes for boards.
	Creating Links	Link creation can be complete in the following ways: data synchronization, file import, GUI creation, batch creation between wavelength transponder units and multiplexer/demultiplexer boards, and automatic creation.	Links are physical or logical connections between objects in the Main Topology. To achieve network configuration and management on the Web LCT, links need to be created between different objects in a suitable way.
Optical Power Management	Customizing the Optical Power Management Template	Optical power templates make it convenient to query and set optical power parameters for objects.	Maintenance engineers often need to know certain parameters for optical power management.
	Querying Optical Power of a Board	This operation helps prevent services from being affected by abnormal optical power.	Optical power changes during signal transmission. The change affects the intensity and sensitivity of optical signals. If the optical power is higher or lower than expected, service-affecting consequences, such as damage to optical components and bit errors, may occur. Periodic query of board optical power is a common maintenance method.
	Adjusting Attenuation Ratio of a Board	This operation helps keep optical power normal and stable.	If the input or output optical power of a board is abnormal, users need to adjust attenuation rates to keep optical power normal and stable.
	Querying Laser Spectrum Analysis Data	The operation is performed to query laser spectrum data and send the data to control boards and the Web LCT for analysis.	This operation needs to be performed after a network is configured or when optical power is abnormal.
	Guaranteeing Laser Performance	Laser performance must be ensured to keep the transmission system running stably.	Input optical power and output optical power of ports are important indicators for measuring laser performance. Users must control input optical power, output optical power, and the upper and lower threshold of input optical power within the acceptable range. Rectification or alert must be given against abnormal optical power.
Power Consumption Management	Querying the Power Consumption of an NE	This operation is performed to query the power consumption of NEs.	If the power consumption of an NE exceeds the threshold, users need to configure energy conservation for the NE in a timely manner.
	Querying the Power Consumption of a Board	This operation is performed to query the power consumption of boards.	When high power consumption occurs on an NE, users need to perform this operation to identify the boards that cause the high power consumption.
	Configuring Energy Conservation for an NE	After energy conservation is configured for NEs, power consumption can be dynamically adjusted for the NEs to achieve environment protection and energy conservation.	NE energy conservation can be configured if the NE power consumption is too high.
	Setting the NE Power Consumption Threshold	If the power consumption of an NE exceeds the preset threshold, the Web LCT informs users of timely adjustment so that the NE will not be damaged.	NE power consumption thresholds protect NEs from being damaged by excessive power consumption.
	Viewing the Network-wide NE Power Consumption Report	By viewing the network-wide power consumption report, users can learn the network-wide power consumption statistics, annually conserved energy, and other information.	The network-wide power consumption report contains the power consumption data of all NEs.
Service Maintenance	Converting Between SNCP and non-protection WDM Services	By configuring WDM services in the NE Explorer, you can convert unprotected services into SNCP services and SNCP services into unprotected services.	During network expansion or migration, users may need to change the types of protection subnets or the protection types of services. This function supports quick in-service conversion between SNCP services and unprotected services.
	Converting Between SNCP and Non-Protection SDH Services	By configuring SDH services in the NE Explorer, you can convert unprotected services into SNCP services and SNCP services into unprotected services.	During network expansion or migration, users may need to change the types of protection subnets or the protection types of services. This function supports quick in-service conversion between SNCP services and unprotected services.
	Conversion Between Normal Ethernet Services and VLAN SNCP Services	Ethernet and VLAN SNCP services can be mutually converted.	Common EPL services and VLAN SNCP services can be mutually converted on the Web LCT.
Fault Diagnosis	Performing a Loopback Setting a Loopback for an OTU Setting a Loopback for an Ethernet Interface Setting a Loopback for a VC4 Path	Configuring OTU, Ethernet interface, and VC4 channel loopback helps diagnose device faults.	By configuring board or channel loopback, users can determine whether the following items are proper: interfaces, fibers/cables, service processing boards, and cross-connect boards.
	Configuring PRBS (SDH Network) Configuring the PRBS Test in the Line Direction Initiated by the Line Board Configuring the PRBS Test in the Line Direction Initiated by the Cross-Connect Board Configuring PRBS (WDM Network) Configuring PRBS Test on the Meter Board Configuring the PRBS Test Status of the Auxiliary Board	Pseudo random binary sequence (PRBS) is a meter-like function module that receives its own unframed services. which helps users analyze the condition of the entire network.	PRBS configuration enables meter boards to transmit PRBS signals and auxiliary boards to transparently transmit PRBS signals on the client and WDM sides. Bit error tests are conducted on links in a meter-free manner.
	Configuring Ethernet Services Testing Ethernet Service Paths Diagnosing Ethernet Protocol Faults	If Ethernet service channels and protocols become faulty, services will be affected. This function ensures proper work of Ethernet service channels and protocols.	This operation can be performed when Ethernet services encounter faults.
	Configuring Ethernet Service OAM Navigation path for a packet network: In the NE Explorer, choose Configuration > Packet Configuration > Ethernet OAM Management > Ethernet Service OAM Management from the navigation tree. Navigation path for a WDM network: In the NE Explorer, select a board and choose Configuration > Ethernet Maintenance > Ethernet Service OAM from the navigation tree.	This function achieves E2E maintenance of Ethernet services.	Operation, administration and management (OAM) tests for Ethernet services can check the connectivity of services for locating and rectifying faults.
	Configuring Ethernet Port OAM Navigation path for a packet network: In the NE Explorer, choose Configuration > Packet Configuration > Ethernet OAM Management > Ethernet Port OAM Management from the navigation tree. Navigation path for a WDM network: In the NE Explorer, select a board and choose Configuration > Ethernet Maintenance > Ethernet Port OAM from the navigation tree.	This function achieves maintenance of P2P Ethernet links.	The Ethernet port OAM is mainly used to automatically check the connectivity and performance and diagnose the faults of the physical links at the MAC or lower layer. This function applies to the scenario where physical Ethernet ports are directly connected.
	Configuring MPLS OAM	MPLS OAM provides complete fault detection and diagnose and performance monitoring for MPLS networks at the tunnel layer.	Users need to detect and diagnose faults and monitor performance at the tunnel layer.
	IP Ping Navigation Path: In the NE Explorer, choose Configuration > IP Ping Test> from the navigation tree.	Only the packet subrack of OptiX OSN 1800 and OptiX OSN 1800 V support this function. Refer to GUI Reference(MSTP/WDM/RTN) > NE Explorer(MSTP/WDM/RTN/Marine/PTN) > NE-Level Function > Configuration > IP Ping Test (MSTP/RTN/WDM) in the Online Help.	IP ping tests are configured for testing network connectivity between wireless devices.
	Data Service Performance Test Navigation Path: In the NE Explorer, select an NE and choose Diagnosis&Maintenance > Data Service Performance Test from the Function Tree.	Only the packet subrack of OptiX OSN 1800 supports this function. Refer to GUI Reference(MSTP/WDM/RTN) > NE Explorer(MSTP/WDM/RTN/Marine/PTN) > NE-Level Function > Diagnosis&Maintenance > Data Service Performance Test of the Online Help.	The Web LCT provides various indicators for E-Line services, such as the throughput and latency, which addresses the cost and efficiency issues brought by site visits.
	Loopback Navigation Path: In the NE Explorer, click the NE and choose Configuration > Packet Configuration > Ethernet Service Management > E-LAN Service. Then click the Loopback tab.	Only the packet subrack of OptiX OSN 1800 and OptiX OSN 1800 V support this function. Refer to GUI Reference(MSTP/WDM/RTN) > NE Explorer(MSTP/WDM/RTN/Marine/PTN) > NE-Level Function > Configuration > Ethernet Service Management (MSTP/RTN/WDM) > E-LAN Service > Loopback of the Online Help.	VLAN ID-based loopback detection helps detect looped E-LAN services.