Method for monitoring ring network on basis of link layer discovery protocol and device

Abstract

The invention discloses a method for monitoring a ring network on the basis of a link layer discovery protocol. The method comprises the following steps of: receiving a link layer discovery protocol LLDP message, and judging an action to be executed to the LLDP message according to the message characteristic of the LLDP message; when judging the forward action is to be executed to the LLDP message, judging whether the LLDP causes ring network storm, if so, discarding the LLDP message, and if not, forwarding the LLDP message; and when judging the report action is executed to the LLDP message, sending the LLDP message to a processor, and processing a neighbor item of link neighbor equipment of the ring network corresponding to the LLDP in a neighbor list. The invention also discloses a corresponding device. By the scheme disclosed by the invention, the monitoring and management of the ring network are more convenient, and the ring network storm can not be caused, so that the requirement for reliability of the ring network can be met.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for monitoring a ring network based on a link layer discovery protocol. Background technique [0002] With the rapid development of IP services and the widespread application of Ethernet in MANs, the scale of Layer 2 networks is getting bigger and bigger, which makes the performance and reliability of Ethernet more and more concerned. In a switched network, the main means to improve network reliability is to deploy some redundant links and build an Ethernet ring network, such as figure 1 As shown, in this way, the redundant link can be used when the primary link fails. The ring network storm is the fatal factor of the ring topology. The ring network usually uses the spanning tree protocol to automatically set the disabled ports on the ring link, logically remove the ring, and avoid the storm. It should be noted that accidental ring formation without p...

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Problems solved by technology

However, since spanning tree disabled ports only allow BPDU (BridgeProtocolDataUnit, Bridge Protocol Data Unit) packets in the spanning tree protocol to enter and exit, it is impossible to discover neighbors on redundant links through LLDP packets. At this time, the network management system The output network topology is only a logical topology (main link topology), which cannot reflect the real physical connection of the network, nor can it be distinguished from a physically non-loop topology, which is not conducive to discovering loops, and the network monitoring effect is not ideal

In addition, even in the ring network, LLDP packets are allowed to enter and exit the disabled port to discover redundant links, there will still be a problem of LLDP packet ring network storm, which cannot meet the high reliability requirements of the ring network

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