Method, system and equipment for protecting ring network link

A technology of equipment and ring network, which is applied in the field of IP network and can solve problems such as communication loops

Active Publication Date: 2007-07-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Embodiments of the present invention provide a ring network link protection method, system, and equipment to solve the problem of communicati

Method used

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  • Method, system and equipment for protecting ring network link
  • Method, system and equipment for protecting ring network link
  • Method, system and equipment for protecting ring network link

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Embodiment 1

[0048] Referring to FIG. 3A, in this embodiment, in a ring network in a normal state composed of four switches, node 1, node 2, node 3, and node 4, each switch is enabled with RRPP, and node 1 is set as the master Node, P is the primary port of the primary node, S is the secondary port of the primary node, and the secondary port is closed to prevent loops;

[0049] As shown in FIG. 3B , assuming that node 4 fails, the link from node 3 to node 4 is blocked, and the link from node 4 to node 3 is a path. When the master node detects that the ring network is in a fault state, in order to distinguish whether the fault is a single-pass fault, it first judges whether the primary port and the secondary port have not received protocol packets within a certain period of time. Since the link from node 4 to node 3 is a path, there is a one-way path from node 4->node 3->node 2->node 1 in the ring network. At this time, the primary port can receive the protocol message sent by the secondary...

Embodiment 2

[0051] Referring to Fig. 3A, in the present embodiment, in the normal ring network composed of four switches, node 1, node 2, node 3 and node 4, each switch has enabled RRPP, and node 1 is set as Primary node, P is the primary port of the primary node, S is the secondary port of the primary node, and the secondary port is closed to prevent loops;

[0052] As shown in FIG. 4A , it is assumed that nodes 3 and 4 fail, causing the links from node 3 to node 4 and from node 4 to node 3 to be unreachable. When the master node detects that the ring network is in a fault state, in order to distinguish whether the fault is a single-pass fault, it first judges whether the primary port and the secondary port have not received protocol packets within a certain period of time. Since the links from node 3 to node 4 and from node 4 to node 3 are unreachable, there is no one-way path in the ring network. At this time, neither the primary port nor the secondary port can receive protocol packets...

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Abstract

This invention discloses a method for protecting ring network links including a main node and more than one transmission nodes, in which, said main node includes a primary port and a sub-port, and the method includes said main node transmits protocol messages to the transmission nodes from the main and sub-ports, if they have not received the messages in a certain period of time, said main node opens said sub-port. This invention also discloses a system and a device for ring link protection.

Description

technical field [0001] The invention relates to the technical field of IP networks, in particular to a ring network link protection method, system and equipment. Background technique [0002] Rapid Ring Protection Protocol (RRPP) is a link layer protocol specially applied to the Ethernet ring. Communication paths between nodes. [0003] An Ethernet ring using the RRPP protocol is mainly composed of multiple nodes, one of which is the master node, and the other nodes are transit nodes. The two ports of the master node on the ring are divided into a master port and a slave port. In order to avoid loops in the ring network, the secondary port of the master node is usually closed. The secondary port cannot send and receive service packets, but can send and receive protocol packets. [0004] In order to detect link failures in the ring network, the master node periodically sends the ring protocol (HELLO) message from the master port. HELLO message, so that the master node thin...

Claims

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Application Information

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IPC IPC(8): H04L12/437H04L29/06H04L1/22H04L12/56H04L12/24
CPCH04L12/437
Inventor 向海洲李彬轩蔡成贵
Owner HUAWEI TECH CO LTD
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