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Ethernet OAM link discovery method

A link discovery, Ethernet technology, applied in the field of Ethernet OAM link discovery, can solve the problems of disorder and inability to complete the discovery process, and achieve the effect of high security

Active Publication Date: 2009-07-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method protects the normal operation of the Ethernet OAM link discovery by introducing RxRmtTd, avoiding that in a point-to-multipoint environment that does not support MPCP or a point-to-point environment with illegal access equipment due to the fact that Ethernet OAM does not care about the point-to-point device, Discover problems such as process disorder or inability to complete

Method used

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  • Ethernet OAM link discovery method
  • Ethernet OAM link discovery method
  • Ethernet OAM link discovery method

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Embodiment Construction

[0022] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] see figure 1 , the switching devices switch1 and switch2 are known devices, and perform Ethernet OAM discovery through the shared link, and another unknown device Unknown subsequently accesses the shared link, and also enables the Ethernet OAM discovery function.

[0024] see figure 2 , the switching devices switch1 and switch2 use the protected Ethernet OAM discovery process, which is completed first when the discovery process is started figure 2 The initialization process shown is to cover the dynamic and static methods of the present invention. Taking MAC as the unique identifier of the device as an example, it is respectively explained that switch1 adopts a dynamic MAC learning method and switch2 adopts a user-configured static MAC method. The initialization steps are as follows...

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Abstract

The invention discloses a method for discovering an Ethernet operation and maintenance (OAM) link, which comprises the following steps: introducing an RxRmtId filter field in a resolution state machine for checking legal OAM protocol data unit (OAMPDU) frame; when the identification information of the OAMPDU frame and the counter point switching equipment identifier of the RxRmtId are not same, checking the existence of the counter point switching equipment identifier of the RxRmtId, in the case of existence, initializing; otherwise, judging that the counter point switching equipment identifier of the RxRmtId is a dynamic identifier or a stationary identifier, in the case of a stationary identifier, generating an occupation failure log or alarm and discarding the OAMPDU frame participating in occupation; and in the case of a dynamic identifier, searching whether the daemon timer is effective. The method can reliably realize point-to-point Ethernet OAM discovery in a point-to-multipoint environment which does not support multi-point control protocol (MPCP) or a point-to-point environment with illegally accessed equipment, so as to improve the security and robustness of Ethernet OAM discovery.

Description

technical field [0001] The invention belongs to the field of link detection, and in particular relates to an Ethernet OAM (Operation Administration Maintenance, operation management and maintenance) link discovery method. Background technique [0002] With the development of IP networks in the direction of multi-service and broadband, traditional Ethernet has no carrier-level management capabilities, and cannot detect, notify, or isolate Layer 2 network faults, let alone detect the end-to-end connection performance and status of user services. When a network failure occurs, there is no effective way to discover and isolate it. Among them, Ethernet OAM based on IEEE 802.3ah defines a link management and maintenance method at the data link layer, which provides network administrators with the ability to monitor the connection status between point-to-point points in the network, discover and quickly locate link faults in time . Ethernet OAM has link discovery capability, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/06
Inventor 姜鹏
Owner ZTE CORP
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