A master-standby switchover method for an eaps ethernet ring network

Abstract

The invention discloses a master-standby switchover method of an EAPS Ethernet ring network. An RPL protection link configuration is added in the EAPS Ethernet ring network, and the transmission node directly connected to the Master main port is configured as a Master-owner through commands, and the The transmission node directly connected to the secondary port of the Master is configured as a Master-neighbor through commands, and the secondary ports of the Master-neighbor and Master-owner are directly connected to the Master. The present invention adopts a high-reliability active-standby switching technology in the EAPS ring network, and configures the designated transmission node as a backup master node. Once the master node is abnormal, the configured backup master node becomes the new master node, ensuring ring protection. The network protocol can still continue to operate, which effectively guarantees the stability and availability of the industrial network.

Description

technical field [0001] The invention relates to an active / standby switching method of an EAPS Ethernet ring network, belonging to the technical field of communication. Background technique [0002] EAPS is an automatic protection switching technology for an Ethernet ring network defined by IETF in RFC3619. When a link on the Ethernet ring network is disconnected, a backup link can be activated quickly to restore communication between nodes on the ring network. Compared with the STP protocol, EAPS has the characteristics of fast topology convergence (less than 50ms) and the convergence time has nothing to do with the number of nodes on the ring network. Taking a single ring as an example, all protocol packets are transmitted in the control plane of vlan5, and all data packets are forwarded in the data plane of other vlans. The specific implementation scheme is as follows: S1, under normal circumstances, the master node periodically Send a health message from the primary port...

AI Technical Summary

Problems solved by technology

This may lead to the following consequences: 1) The control plane of the master node crashes, and the data plane works normally. If the secondary port is in the forwarding state at this time, and there are no other link failures on the ring network, a loop will be formed, causing a broadcast storm

Conversely, if the secondary port is in the blocking state at this time, although there will be no more loops on the ring network, if other links on the ring network fail or recover, the master node cannot control all transmission nodes on the ring network to clear the FDB address table. As a result, data switching on the ring is very slow

2) Both the control plane and the data plane of the master node collapse. At this time, if other links of the ring network fail, the transmission nodes at both ends of the faulty link with the master node as the demarcation point will be completely isolated and cannot communicate data traffic; if The ring network failure link is restored, and the master node cannot control other transmission nodes to clear the FDB table, which will also cause very slow ring network data switching

3) If the master node is normal, but its primary and secondary ports are all link down, it will eventually lead to very slow ring network data switching

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