Ethernet OAM link discovery method

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 ...

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

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