Method to refresh forwarding database in Ethernet ring protection

Abstract

The invention provides a method for refreshing the transmitting data base in an Ethernet single ring protection. Only when the node of the Ethernet single ring is open and the topology of a blocking interface ring is changed, the refreshing operation of transmitting data base is initiated. When the refreshing of all node data base of the ring is finished by order, the refreshing information is ended. The method of the invention can reduce unwanted flood of a data frame in the ring.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method for forwarding database refresh (FDB Flush) in Ethernet ring network protection. Background technique [0002] As a metropolitan Ethernet technology, the Ethernet ring network's self-healing protection technology can solve the problems of weak protection capability and long recovery time of traditional data networks. Under normal circumstances, the RPLOwner (Ring Protection Link Owner, master node of the ring protection link) in the Ethernet ring network will block the ports in one direction on the ring to avoid the generation of broadcast storms. Generally speaking, if you want to open a blocked port in an Ethernet ring, at least one other port must be blocked. That is, at least one port on the ring is blocked at any time. Each node on the ring has two ports, and these two ports are respectively connected to two directions of the ring. [0003] When a link or a node...

AI Technical Summary

Problems solved by technology

The forwarding database refresh (FDB Flush) operation should be performed at a reasonable time. However, in the prior art, the FDB Flush operation may be triggered when an alarm occurs on the link on the ring

And this operation of triggering FDB Flush according to whether an alarm is generated may cause some unnecessary MAC address table updates. If this operation is performed too much, unnecessary flooding of data frames will occur in the ring, reducing bandwidth utilization.

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