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Ethernet automatic protection switching method

An automatic protection switching, Ethernet technology, applied in data exchange network, data exchange through path configuration, digital transmission system, etc., can solve problems such as network oscillation, achieve the effect of increasing stability and preventing network topology oscillation

Inactive Publication Date: 2008-02-20
HUAWEI TECH CO LTD
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Problems solved by technology

[0014] The present invention proposes an Ethernet automatic protection switching method in order to solve the problem that the prior art may cause network shock

Method used

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Embodiment Construction

[0027] As shown in Figure 2, the EAPS protection of this scheme also uses the polling and alarm mechanism to check the connectivity of the Ethernet ring and quickly detect any faults. It mainly includes the following steps:

[0028] A. Judging whether the ring quality detection frame timeout in the polling process is detected, or the "LINKDOWN" signal sent by other transmission nodes in the alarm process is detected, and whether the slave port link of the master node is disconnected or the physical port is faulty; B. When the slave port link of the master node is disconnected or the physical port fails, the master node suppresses the EAPS protection action; when the slave port link and the physical port of the master node are in a normal state, it detects whether the ring is good or bad in the polling process When the frame times out or detects the "LINKDOWN" signal sent by other transmission nodes during the alarm process, the master node starts the EAPS protection action.

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Abstract

The utility model relates to an Ethernet automatic protection switching method, comprising at least an alarm process or a polling process. The method comprises the following steps: A. judging whether the loop good and bad detection frame in the polling process is detected overtime, or the LINKDOWN signal sent by other transmission nodes in the alarm process is detected, and judging whether the secondary port link of the main node is dropped or the physical port is failed; B. when the secondary port link of the main node is dropped or the physical port is failed, the main node restrains EAPS protection action; when the physical port and the secondary port link of the main node is in normal operation, and the loop good and bad detection frame in the polling process is detected overtime, or the LINKDOWN signal sent by other transmission nodes in the alarm process is detected, then the main node starts EAPS protection action. Since the unsuitable protection action is restrained, the method prevents network topology oscillation and improves the stability of EAPS protection when the secondary port of the main node fails or the link interconnected with the secondary port of the main node fails in EAPS protection domain.

Description

technical field [0001] The invention relates to an Ethernet automatic protection switching method (EAPS-Ethernet Automatic Protection Switching). Background technique [0002] With the rapid increase of data service requirements, traditional Ethernet (LAN) is evolving to carrier-class Ethernet. Among them, the Metro Ethernet Forum (MEF) gave five basic requirements for carrier-class Ethernet: (1) scalability, (2) reliability, 50ms protection switching, (3) support for QOS policies, (4) support for TDM emulation services , (5) Operation-Management-Maintenance and Assignment (OAM&P) of Ethernet. [0003] It can be seen that the MEF requires a protection switching of less than 50 ms in the protection switching requirement of the carrier-class Ethernet service proposed by the Ethernet protection. [0004] Metro Ethernet Standard (MEF2, full name "Ethernet Service Protection Requirements and Framework in Metro Ethernet Networks") was officially released in February 2004. From t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/437H04L12/423H04L12/24H04L12/26H04L1/22H04L12/28
Inventor 谭国斌
Owner HUAWEI TECH CO LTD
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