Ethernet loop network protection method and transmission node

Abstract

The invention provides a method for Ethernet ring protection and transmission node of Ethernet ring. When fault occurs in the ring, the transmission node of the Ethernet ring which senses the fault generates message of Ethernet ring fault and sends the message of Ethernet ring fault in the ring and refreshes its own media access control item, or, a delay timer is started at the same time when the message of Ethernet ring fault is being sent. When the delay timer reaches the timing time-period, its own media access control item is refreshed. When other transmission nodes receive the message of Ethernet ring fault, the transmission nodes send the message of Ethernet ring fault and determine that fault really occurs in the ring according to the message of Ethernet ring fault. When fault really occurs in the ring, its own media access control item is refreshed, or, the delay timer is started at the same time when the message of Ethernet ring fault is being sent, when the delay timer reaches the timing time-period, its own media access control item is refreshed. Therefore, operation interrupt time caused by the untimely refreshment of the MAC item by the transmission nodes can be reduced.

Description

technical field [0001] The invention relates to network communication technology, in particular to an Ethernet ring network protection method and a transmission node. Background technique [0002] The Ethernet automatic protection switching method is applied to the Ethernet ring network. There is one master node in an Ethernet ring network, and other network nodes are transmission nodes. Fig. 1 is a schematic structural diagram of an Ethernet ring network in the prior art, in which S1 is the master node, and other S2 to S6 are transmission nodes, wherein, one of the two ports connected to the Ethernet ring network by the master node is the master node port (P1 in Figure 1), and the other is a secondary port (P2 in Figure 1). If the ring network is not faulty, the secondary port of the master node is blocked; if the ring network is faulty, the master node opens the secondary port to forward data packets to maintain the connectivity of the ring network. [0003] The protecti...

AI Technical Summary

Problems solved by technology

[0004] However, in this method of the prior art, other transit nodes except S4 and S5 in FIG. If the message is lost during sending, the transmission node that does not receive the RING_DOWN_FLUSH_FDB message needs to wait for the natural aging of the MAC entry, that is, refresh its own MAC entry after reaching the aging time of the MAC entry; if the master node on the ring network If a fault occurs, the RING_DOWN_FLUSH_FDB message cannot be sent on the ring network, and each transmission node also needs to wait for the natural aging of the MAC entry before refreshing its own MAC entry

However, the aging time of MAC entries is long, usually at the level of minutes. If the transmission node cannot refresh the MAC entries in time within this aging time, the ring network will be disconnected for a long time, and the business will not be able to proceed normally.

Images