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Huawei OSN 1500 adopts a "dual-core" architecture, which can be used as both packet equipment and TDM equipment. Together with other Huawei devices, the OptiX OSN 1500 supports differentNetworking applications: pure packet mode applications, hybrid networking applications (packet mode), and TDM applications (packet mode).
(stacked packet mode and TDM mode), and pure TDM mode applications, realizing optimal processing of data services and traditional SDH services.
Scenarios
Huawei OSN1500 has three independent subnets, which are not connected to each other by optical fiber, but the ECC is interoperable. After checking, the OSI communication protocol is turned on by default, which leads to the automatic establishment of routes, and if you want the subnets to be independent of each other, you need to turn off the OSI communication protocol.
DCN Failure
Phenomenon Description
The network consists of OptiX OSN 3500 devices that form three independent rings: the North Ring, the Southeast Ring, and the Southwest Ring, and there is no fiber connection between the three rings. The three devices belonging to different rings in the server room each have a network cable connected to a HUB, and this HUB is connected to the network management computer. Problems are found when querying ECC routing, such as logging into a network element on the north ring to query ECC routing, and being able to connect to devices on the other rings, there is no fiber optic connection between the network elements, as mentioned earlier. The same situation was found with the other ring network elements. The extended ECC for the gateway network elements on the three rings is off, and under normal circumstances the network elements on these three rings cannot log in to each other.
Cause Analysis
Due to the installation problems of the engineering and construction personnel. Resulting in the storage of patch fibers into cross fibers, resulting in the emergence of fiber optic connections and gateway network element communication protocols, need to be checked one by one.
Operation steps
- Check whether the fiber connection is incorrect. First, unplug the network cable from the Southwest Ring gateway network element to the HUB, log in to the North Ring network element to check the ECC route, at this time, you cannot connect to the network element on the Southwest Ring. Then unplug the network cable from the gateway network element of the Southeast Ring to the HUB, at this time, only the gateway network element of the North Ring accesses the network management on the HUB, log in to the North Ring network element to check the ECC route, at this time, it can not be connected to the network elements of the Southwest Ring and the Southeast Ring, so exclude the fault of the fiber optic connection.
- Check whether the extended ECC is configured.
- Check the OSI protocol status of the gateway network element. Since the OSN device supports the OSI communication protocol, which is currently turned on by default on the gateway, routes are established when the device is connected through the HUB. After turning off the OSI protocol on the gateway network element, the inter-subnet ECC cannot interoperate, and all network elements can only log in to this subnetwork element.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to call!
