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Network node and fault recovery method of Ethernet ring network therein

A fault recovery and network node technology, applied in the link layer switching technology and the ring network field, can solve problems such as data packet forwarding interruption, achieve the effect of smooth fault recovery process, avoid traffic oscillation, and avoid broadcast storms

Active Publication Date: 2008-03-12
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] What the present invention aims to solve is the problem of interrupting the forwarding of all data messages when the ring network fails to recover in the prior art

Method used

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  • Network node and fault recovery method of Ethernet ring network therein
  • Network node and fault recovery method of Ethernet ring network therein
  • Network node and fault recovery method of Ethernet ring network therein

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Embodiment Construction

[0047] In the process of ring network failure recovery, when the node connected to the original failure point detects that the failure is eliminated, it will temporarily block the ring port connected to the original failure point, that is, filter all data packets passing through the port on the ring. The forwarding path of the message remains the same as when the ring network fails.

[0048] For a ring network working in a stable state, at this time, each node forwards the received unicast data message according to the outgoing port of the message destination address in the forwarding table of the node, and according to the data when the ring network fails The message forwarding path forwards the message to a node whose outgoing port is a non-on-ring port, and the node forwards the message down the ring; for received multicast data messages and broadcast data messages, it is usually required At the end of the forwarding path, nodes with blocked ports will be discarded. It can be see...

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Abstract

The present invention discloses an Ethernet network fault recovery method. The present invention comprises that when the elimination of the ring network fault is detected, a master node forwards out a unicast data packet of which the access is from a port, and the other nodes recover the packet forwarding; according to the forwarding path of the data packet after a sub part is blocked, the forwarding table information of the node is synchronized; and sub part is blocked by the master node. The present invention realizes the uninterrupted forwarding of the unicast data packet in the process of recovering the ring network fault, and avoids the possible broadcasting turmoil; meanwhile, the synchronization mechanism of a forwarding table avoids the flow oscillation caused by the ring network because of the refreshing and forwarding of all the nodes, thereby the fault recovery process is smoother.

Description

Technical field [0001] The present invention relates to link layer switching technology and ring network technology, in particular to a fault recovery method of a link layer Ethernet ring network and a network node applied thereto. Background technique [0002] With the development of Ethernet technology in the field of metropolitan area networks and access networks, Ethernet ring networks have been increasingly used. An Ethernet ring network usually refers to a link layer network with a redundant structure, with failover and failover functions. [0003] Extreme Company proposed a single ring network failover and recovery method in the US patent US6766482, and extended it to a scheme that can realize the failover and recovery of multiple intersecting ring networks in the European patent application EP1575221, named EAPS (Ethernet Automatic Protection Switching, Ethernet automatic protection switching); the applicant disclosed another single ring network and multiple intersecting ...

Claims

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Application Information

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IPC IPC(8): H04L12/437H04L12/56H04L29/06H04L45/28
Inventor 宁军
Owner NEW H3C TECH CO LTD
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