Communication Maintenance Operations

The U2000 Web LCT provides many communication monitoring, diagnosis, and maintenance functions. If network storms occur, NEs become unreachable, or communication is interrupted, you can use these functions to quickly locate and diagnose faults.

Classification	Operation	Function	Scenario
Network communication monitoring	Performing NE ID-based Ping Tests	From the test result, you can learn the packet loss rate and delay that reflect the network status.	You can perform an NE ID-based ping (ECC ping) test on NEs to check the communication between two NEs.
	Performing NE ID-based Traceroute Test	From the test result, you can learn transit nodes and the communication status between the two NEs.	You can perform an NE ID-based traceroute (ECC traceroute) test on NEs to check the communication between two NEs, find the transit NEs between them, and locate a fault.
	Performing IP Address-based Ping Tests	From the test result, you can learn the packet loss rate and delay that reflect the network status.	IP address ping tests can check the connection between a Huawei NE and a third-party NE.
	Performing IP Address-based Traceroute Tests	From the test result, you can learn transit nodes and the communication status between the two NEs.	IP address traceroute tests can check the connection between a Huawei NE and a third-party NE, find the NEs between them, and locate fault points.
Diagnosing a network communication fault	Setting a Loopback NOTICE: As a loopback interrupts services, it is only used for fault location and must be released after the fault is removed.	The loopback is a common and effective way to locate equipment faults. Loopback include: IF interface loopback ODU interface loopback SDH interface loopback PDH interface loopback Ethernet interface loopback ATM interface loopback VC4 path loopback VC3 path loopback Loopback for lower order services in a VC4 path Lower order service loopback NE loopback Microwave link loopback	If a microwave link is faulty, microwave link loopback can locate specific fault points.
	Checking Path Loopback Status	You can view all optical or electrical ports for which you configure loopback in the network and view the loopback status.	You can cancel the loopback to avoid impact on services due to a loopback that should not be performed.
	Checking Cross-Connection Loopback Status	You can view all paths for which you configure cross-connection loopback in the network and view the loopback status.	You can cancel the loopback to avoid impact on services due to a loopback that should not be performed.
	Checking Port Laser Status	You can view all lasers that are in the off state in the network.	You can modify their status to avoid impact on services due to misconfiguration.
	Checking Path Loading Status	You can view all paths that are set to the non-loaded state in the network.	You can modify the loading status to avoid impact on services due to misconfiguration.
	Checking Path Alarm Reversion Status	You can view all paths for which you configure alarm reversion in the network.	You can modify the alarm reversion status to avoid impact on services due to misconfiguration.
	Checking Path Alarm Suppression Status	You can view all alarms for which you configure alarm suppression in the network.	You can restore the suppression status of an alarm to the default value, so that the alarm monitoring of the service is not affected by improper settings.
	Checking Path Alarm Insertion Status	You can view all paths for which you configure alarm insertion in the network.	You can modify the alarm insertion status to avoid impact on services due to misconfiguration.
	Checking the DCC Enabling Status	You can view all ports where DCC is in the shutdown state in the network.	You can modify the DCC enabling status for the ports.
	Resetting Boards	Reset is a protection scheme for applications and data files on the equipment. Reset is of two types: warm reset and cold reset.	When a board is not running properly, you can reset the board so that it returns to the normal state.
	Testing the Connectivity of IF Cables	IF cable hardware tests can locate hardware faults.	If services are abnormal while ODU and IF boards are working properly, perform an IF cable hardware test to check whether IF cables are faulty.
Modifying network communication parameters	Modifying NE Attributes	Modifying the existing NE communication data, including: Modifying the NE ID Changing the GNE for NEs Deleting NEs	You can modify the existing NE communication data that needs adjustment.
	Modifying the Fiber Configuration Data	Modifying the existing fiber communication data, including: Modifying Fiber/Cable Information Deleting DCN Communication Cables	You can modify the existing fiber communication data that needs adjustment.
	Access control	Common access control means include: Access control DCC access control Serial port and Ethernet port access control USB access control Navigation path: In the NE Explorer, choose Communication > Access Control from the navigation tree.	This function controls communication between NEs and the U2000 Web LCT or between NEs and gateway NEs. It is also used to transmit U2000 Web LCT information.
	SNMP Communication Parameters	You can set SNMP parameters for NEs. Navigation path: In the NE Explorer, choose Communication > SNMP Communication Parameters from the navigation tree.	SNMP parameters need to be set for NEs if you want to manage the NEs on a third-party NMS.
	Communication Parameters	Navigation path: In the NE Explorer, choose Communication > Communication Parameters from the navigation tree.	NE communication parameters need to be set to ensure successful communication between the U2000 Web LCT and NEs.
	Automatic discovery and server parameters	Navigation path: In the NE Explorer, choose Communication > NMS Server from the navigation tree.	Automatic discovery and server parameters need to be set on gateway NEs if you want non-gateway NEs to be automatically discovered on the U2000 Web LCT.