Redundant protection method and system for RPR bridge

Abstract

The invention discloses an elastic grouping ring RPR bridge redundant protection method and a system. The kernel of the method is characterized in that in a protective group which consists of at east two RPR bridge nodes simultaneously on two RPR bridge rings, the MAC address of a master node in the protective group has a change, the changed MAC address is notified to a spare node; a topologic relation converges, and after the topologic relation converges, the master node continues to be responsible for transmitting a transannular message according to the changed MAC address, the spare node continues to act as the spare of the master node; thus only one master node transmits the transannular message, the invention avoids the circumstance that two transannular nodes simultaneously transmit the transannular message, thereby avoiding the broadcasting storm which can occur in a short time.

Description

technical field [0001] The invention relates to the communication field, in particular to the RPR bridge redundancy protection technology. Background technique [0002] RPR technology is a new technology designed to meet the requirements of packet-based MAN. Its network architecture is as follows: figure 1 As shown in the figure, the two RPR bridge devices on the left, RPR cross-ring bridge device 1 and RPR cross-ring bridge device 2 form an RPR single ring; the two RPR bridge devices on the right, RPR cross-ring bridge device 1 and RPR span The ring bridge device 2 forms an RPR single ring, and two RPR single rings intersect to form a spanning ring. RPR cross-ring bridge device 1 and RPR cross-ring bridge device 2 are located on two RPR single rings at the same time. [0003] The RPR bridge device carries Layer 2 Ethernet packets through Ethernet over RPR, and uses RPR extended frames to forward them on the RPR single ring. Since RPR carries Layer 2 Ethernet packets, if ...

AI Technical Summary

Problems solved by technology

However, when the MAC address of the node changes, it will trigger a topology change, and the topology will be re-stabilized within 50ms. After the MAC address of the node changes and before the topology is re-stabilized, the active node does not The MAC address of the backup node is notified to the backup device, but the backup node finds that the MAC address corresponding to the active node cannot be found on a ring by comparing the topology database. Responsible for the forwarding of cross-ring messages. At this time, since the original active node and the standby node, the two RPR cross-ring bridge nodes, both forward cross-ring messages, a short-term broadcast storm will be caused at this time.

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