Network topology collecting method for tree shaped network and network equipment

Abstract

The invention relates to the communication technique, which provides a topological information acquisition method and a network device of tree-shaped network, and avoids network topology and the limitation of VLAN or three-layer network equipment in the process of discovering. The method comprises using a topological collecting device as a start node, downwards discovering layer by layer through sending out topological request messages to a lower link interface, and then sending out topological information response messages to an upper link, contracting topology layer by layer, since topological information response messages and topological refresh messages received by each network equipment are from the lower link equipment, the topological information refresh messages can not be limited by the VLAN or the three-layer network equipment in the network through the layer by layer delivery, and the messages are finally sent to the topological collecting device, and topological acquisition work is finished when topology is found. Furthermore, when topology of network is changed, the topological collecting device can timely and reliably refresh topological information of integral network, and keeps the synchronization of network topology and an actual network structure.

Description

technical field [0001] The invention relates to communication technology, in particular to a method and device for discovering and collecting network topology based on Ethernet equipment. Background technique [0002] With the continuous development of the Internet, the scale of the network is constantly expanding, and the complexity of the network is also increasing. Under this trend, it is extremely important to strengthen the management of the network and establish and maintain a safe and stable network environment. Among them, how to establish an effective network topology model and timely discover the topology changes in the network is especially important for network management. The main purpose of network topology discovery is to obtain the basic information of network devices and the connection relationship information between them, and draw the entire network topology map on this basis. Network managers can quickly locate faulty nodes on the basis of topology diagr...

AI Technical Summary

Problems solved by technology

There are many methods currently implemented at this stage, but most technical solutions do not take into account two aspects: one is that the devices that cross VLANs in the network are not handled well enough; the other is that the topology changes in the network are not handled well enough.

[0011] In this prior art, when a network device receives a topology information request message, it constructs a response message whose destination address is the unicast MAC address of the topology collection device. In this case, if the network device and the topology collection device are not When there are three-layer network devices in the same VLAN or in the middle, the constructed response message may not reach the topology collection device, so that the complete topology cannot be collected

This greatly limits the networking model and cannot adapt to the more complex network topology in the current network, which has certain limitations

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